Provided are an electrolytic cathode that is excellent in reverse current resistance and able to maintain catalytic activity while reducing the amount of a platinum group element used for a catalyst layer, and a method for producing the electrolytic cathode. The electrolytic cathode comprises a catalyst layer provided on a conductive base material made of nickel, the catalyst layer containing ruthenium, praseodymium, neodymium, and iron. The catalyst layer comprises a first catalyst layer provided along the surface of the base material, and a second catalyst layer provided on the first catalyst layer along the surface of the first catalyst layer. The second catalyst layer contains more neodymium and iron than the first catalyst layer.
C25B 11/053 - Electrodes comprising one or more electrocatalytic coatings on a substrate characterised by multilayer electrocatalytic coatings
B01J 23/89 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the iron group metals or copper combined with noble metals
B01J 37/02 - Impregnation, coating or precipitation
C25B 11/081 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of a single catalytic element or catalytic compound the element being a noble metal
C25B 11/093 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds at least one noble metal or noble metal oxide and at least one non-noble metal oxide
The present invention relates to an electrode, preferably a gas evolution electrode, comprising a substrate, a porous interlayer and a catalytic layer, wherein the porous interlayer comprises nickel and have a surface area of at least 0. 1 m2 /g measured by BET, wherein the catalytic layer comprises at least one catalytically active metal, wherein said porous interlayer has an inner porous surface and an outer surface, wherein the at least one catalytically active metal is a transition metal, a rare earth element or a combination thereof, wherein at least 80% of said at least one catalytically active metal is deposited on the outer surface of said porous interlayer measured by cross-sectional SEM EDAX image analysis, wherein at most 20% of said at least one catalytically active metal is deposited in the inner porous surface measured by cross-sectional SEM EDAX image analysis.
C25B 1/04 - Hydrogen or oxygen by electrolysis of water
C25B 1/46 - Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis in diaphragm cells
The Present invention relates to a gas diffusion electrode (GDE), preferably oxygen-depolarized cathode (ODC), comprising an inert conductive substrate and a catalytic coating, wherein the catalytic coating comprises ruthenium-rhodium sulphides, wherein rhodium sulphide content is comprised between 30% and 70% by weight referred to metals with respect to the total weight of said ruthenium-rhodium sulphides, wherein ruthenium sulphide content is comprised between 30% and 70% by weight referred to metals with respect to the total weight of said ruthenium-rhodium sulphides. The present invention also relates to the use of the aforementioned oxygen-depolarized cathode (ODC) in a hydrochloric acid electrolysis cell (HCl-ODC).
C25B 11/075 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of a single catalytic element or catalytic compound
4.
METHOD FOR MAKING METAL OXIDE ELECTRODE AND ELECTRODE OBTAINED THEREOF
The present invention relates to a method for making metal oxide electrode, the method comprising the subsequent steps of: a- dissolving one or more metal salts in a solution, b- adding silica powder to said solution, c- applying said solution comprising said silica powder and said dissolved one or more metal salts on a conductive substrate thus forming a coated substrate, d- thermally decomposing the one or more salts by curing said coated substrate at a temperature comprised between 350oC and 950oC thus obtaining a cured substrate, e- optionally, repeating steps c- and d- to arrive to a predefined thickness and/or metal-load, f- treating said cured substrate with a strong basic aqueous solution adapted to remove silica from said substrate.
C25B 1/04 - Hydrogen or oxygen by electrolysis of water
C25B 11/075 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of a single catalytic element or catalytic compound
C25B 11/077 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of a single catalytic element or catalytic compound the compound being a non-noble metal oxide
C23C 18/12 - Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coatingContact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
An electrode for gas evolution in electrolytic processes comprising a catalytic coating containing oxides of tin, ruthenium, titanium and one or more elements selected from the group consisting of niobium, tantalum and tungsten applied to a metallic substrate, and a method for its preparation.
C25B 11/093 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds at least one noble metal or noble metal oxide and at least one non-noble metal oxide
C25B 1/46 - Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis in diaphragm cells
The present invention concerns a gas diffusion electrode for electrochemical processes comprising an electrically conductive porous gas diffusion layer; at least one porous catalyst layer arranged adjacent to said gas diffusion layer, wherein said catalyst layer being obtained from a precursor material which does not contain any ionomer; and an ionomer layer arranged adjacent to said at least one porous catalyst layer, said catalyst layer being obtained from a precursor material which does not contain any ionomer. The invention also concerns an electrochemical cell comprising such a gas diffusion electrode and a method for manufacturing such a gas diffusion electrode.
C25B 11/052 - Electrodes comprising one or more electrocatalytic coatings on a substrate
C25B 11/053 - Electrodes comprising one or more electrocatalytic coatings on a substrate characterised by multilayer electrocatalytic coatings
C25B 11/056 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material consisting of textile or non-woven fabric
C25B 11/077 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of a single catalytic element or catalytic compound the compound being a non-noble metal oxide
C25B 11/093 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds at least one noble metal or noble metal oxide and at least one non-noble metal oxide
The present invention concerns a gas diffusion electrode for the electrochemical reduction of carbon dioxide comprising an electrically conductive porous gas diffusion layer; at least one porous catalyst layer arranged adjacent to said gas diffusion layer, said at least one porous catalyst layer comprising a first porous catalyst layer comprising a copper-based first catalyst material, wherein said first porous catalyst layer comprises a mixture of said copper-based first catalyst material and a hydrophobic material, said porous catalyst layer being obtained from a precursor material which does not contain any ionomer; and an ionomer layer arranged adjacent to said at least one porous catalyst layer, said ionomer layer being obtained from a precursor material which does not contain any catalyst. The invention also concerns an electrochemical cell comprising such a gas diffusion electrode and a method for manufacturing such a gas diffusion electrode.
C25B 11/052 - Electrodes comprising one or more electrocatalytic coatings on a substrate
C25B 11/053 - Electrodes comprising one or more electrocatalytic coatings on a substrate characterised by multilayer electrocatalytic coatings
C25B 11/056 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material consisting of textile or non-woven fabric
C25B 11/077 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of a single catalytic element or catalytic compound the compound being a non-noble metal oxide
C25B 11/093 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds at least one noble metal or noble metal oxide and at least one non-noble metal oxide
An electrolysis unit A fluid manifold system is feeding electrolytic solution into the electrolytic cells and discharging the electrolytic solution out of the electrolytic cells. The cavity of an expandable closing device is pressurized so that its shell expands and the volume of the cavity increases. The expandable closing device is arranged within the fluid manifold system, so that the fluid manifold system is open for the passage of electrolytic solution if the expandable closing device is in a depressurized state and the fluid manifold system is closed for the passage of electrolytic solution if the expandable closing device is in a pressurized state.
C25B 9/23 - Cells comprising dimensionally-stable non-movable electrodesAssemblies of constructional parts thereof with diaphragms comprising ion-exchange membranes in or on which electrode material is embedded
C25B 9/77 - Assemblies comprising two or more cells of the filter-press type having diaphragms
C25B 15/08 - Supplying or removing reactants or electrolytesRegeneration of electrolytes
09 - Scientific and electric apparatus and instruments
11 - Environmental control apparatus
Goods & Services
(1) Machines and equipment for the chemical and electrochemical industry.
(2) Scientific and control apparatus and instruments, especially electrolyzer, electrodes, fuel cells; batteries.
(3) Water treatment apparatus and equipment, water treatment filters, water treatment units, ultraviolet sterilization equipment, ozone generators for disinfection and water treatment.
09 - Scientific and electric apparatus and instruments
11 - Environmental control apparatus
Goods & Services
Machines and plants for the chemical and electrochemical industry. Scientific apparatus and instruments and control apparatus and instruments, in particular Electrolysers, Electrodes, Fuel batteries; Batteries. Apparatus and installations, all for use in the treatment of water, Water treatment filters, Water conditioning units, Ultraviolet sterilisation plants, ozonisers for water disinfection and treatment.
The present invention refers to an electrolyser (1) for the production of hydrogen from an alkaline electrolyte. The electrolyser (1) comprises a first header (2) and a second header (3) between which a plurality of elementary cells (4) and a plurality of bipolar plates (5) are stacked. Each bipolar plate (5) separates two adjacent elementary cells. The electrolyser (1) further comprises a plurality of clamping elements (20) that mechanically connect said headers (2, 3). Each of the elementary cells (4) comprises a frame (6) defining a chamber (6A), having an anodic section and a cathodic section, in which an anodic electrode (7) and a cathodic electrode (8) are at least in part housed. Each of the elementary cells (4) further comprise a separator element (10) that separates the anodic section from the cathodic section. According to the invention, each of the frames (6) comprises first through holes (61) and each of the bipolar plates (5) comprises second through holes (51), wherein each of said first through holes (61) of one frame (6) is mutually aligned with a corresponding first through holes (61) of each of the another frames (6) and with one of said second through holes (51) of each bipolar plate (5), wherein each one of said clamping means (20) extends through said through holes (51, 61) mutually aligned.
An electrolyzer (1) for electrolyzing saline water comprising: a housing (10) extending along a longitudinal direction (X-X) between a first end portion (11) and an opposed second end portion (12) and having a feed fluid inlet (13) and a product fluid outlet (14); two or more electrolytic cells (20) connected fluidically between the feed fluid inlet (13) and the product fluid outlet (14) and configured to electrolyze saline water entering the housing (10) to produce an electrolyzed fluid comprising hydrogen, hypochlorite and saline water; each electrolytic cell (20) comprising an anode (21) and a cathode (22); the housing (10) comprises: an inner wall (30) extending from the first end portion (11) towards the second end portion (12) along the longitudinal direction (X-X) and dividing at least a portion of the housing (10) in an inlet channel (15) and an outlet channel (16) respectively associated to the feed fluid inlet (13) and to the product fluid outlet (14); a diverting channel (40) at the second end portion (12) configured to divert the electrolyzed fluid from the inlet channel (15) to the outlet channel (16), the two or more electrolytic cells (20) being arranged along the inlet channel (15), the outlet channel (16) and the diverting channel (40)
The present invention relates to an article for electrolytic cells, especially Chlor-Alkali and Alkaline Water Electrolysis cells, comprising a nickel-based protective element and an electrically conductive pocket, wherein said pocket substantially encloses said protective element on all sides, a batch of two or more such articles and a process for the preparation of these batches.
The present invention refers to an electrolyzer (1) for the production of hydrogen from an alkaline electrolyte. The electrolyzer (1) comprises a first header (11) and a second header (12) between which a plurality of elementary cells (20) and a plurality of bipolar plates (5, 5', 5'') are stacked. Each bipolar plate (5) separates two adjacent elementary cells. According to the invention, each of said bipolar plates (5, 5',5'') comprises two plate-form components (5A, 5B) coupled together and configured so as to define one or more inner cavities (66) for the circulation of a cooling fluid. Furthermore, each bipolar plate (5, 5', 5'') comprises an inlet section (SI) and an outlet section (SV) respectively for the inlet and outlet of said cooling fluid in said one or more inner cavities (66).
An electrode for hypochlorite evolution comprising a conductive substrate and a catalytic coating applied over the substrate and a multilayer method for producing the same.
An electrode for gas evolution in electrolytic processes comprising a nickel-based metal substrate and a coating formed on said substrate, wherein the coating has pre-formed particles of a catalyst material exhibiting a perovskite-type structure dispersed within a nickel-based metal or metal oxide binder; and a method for the production of such an electrode.
C25B 11/091 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds
17.
ELECTRODE FOR THE ELECTROLYTIC EVOLUTION OF HYDROGEN
An electrode and in particular an electrode suitable for use as a cathode for hydrogen evolution in industrial electrolytic processes and a method for its preparation. The electrode comprises a metal substrate provided with a catalytic coating, the catalytic coating comprising a first protective layer in direct contact with the substrate, the first protective layer comprising platinum, in the form of metal or its oxides, and a second layer applied on top of the first protective layer, the second layer comprising platinum, palladium and an element selected from the group of rare earths, in the form of metals or their oxides, wherein the second layer comprises 15-40% by weight of platinum and 10-30% by weight of palladium and 40-75% by weight of an element selected from the group of rare earths referred to metals.
C25B 11/097 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds comprising two or more noble metals or noble metal alloys
18.
ELECTRODE FOR GASEOUS EVOLUTION IN ELECTROLYTIC PROCESS
The present invention relates to an electrode and in particular to an electrode suitable for gas evolution comprising a metal substrate and a catalytic coating. Such electrode can be used as an anode for the development of oxygen in electrolytic processes such as, for example, in the alkaline electrolysis of water.
C25B 11/075 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of a single catalytic element or catalytic compound
C25B 1/04 - Hydrogen or oxygen by electrolysis of water
C25B 11/081 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of a single catalytic element or catalytic compound the element being a noble metal
C25B 11/091 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds
B01J 23/89 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the iron group metals or copper combined with noble metals
B01J 37/02 - Impregnation, coating or precipitation
An anode for oxygen evolution in electrolytic processes comprising a nickel-based planar substrate having a first side and second side and a porous catalytic coating formed on at least one side of the substrate, wherein the porous catalytic coating exhibits a lamellar morphology made from metallic patches and void patches, the metallic patches being made from a material selected from nickel, nickel oxide, a nickel-aluminium alloy, or combinations thereof. The present invention also concerns a method for the production of such an anode using powder plasma spraying or electric wire-arc spraying.
C25B 11/091 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds
An electrolyser and a method for producing the same. The electrolyser comprises at least two electrolytic cells respectively provided with anodic and cathodic frames where the frames are equipped with feed and discharge channels that reduce stray currents and facilitate cell assembly. The electrolyser may be advantageously employed for high pressure alkaline water electrolysis (AWE).
An electrode for electrolytic processes, in particular to an anode suitable for oxygen evolution in an industrial electrolytic process and a method of manufacturing thereof. More specifically, MMO coated titanium anode for electrochemical reaction used for oxygen evolution reaction (OER) in various applications such as electrowinning, electroplating, electrogalvanizing and electrolytic copper-foil production, and methods for manufacturing the anode.
C25B 11/093 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds at least one noble metal or noble metal oxide and at least one non-noble metal oxide
C25B 11/052 - Electrodes comprising one or more electrocatalytic coatings on a substrate
C25B 11/097 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds comprising two or more noble metals or noble metal alloys
An electrode for electrolytic processes, in particular to an anode suitable for oxygen evolution in an industrial electrolytic process and a method of manufacturing thereof. More specifically, MMO coated titanium anode for electrochemical reaction used for oxygen evolution reaction (OER) in various applications such as electrowinning, electroplating, electrogalvanizing and electrolytic copper-foil production, and methods for manufacturing the anode.
C25B 11/077 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of a single catalytic element or catalytic compound the compound being a non-noble metal oxide
C25B 11/052 - Electrodes comprising one or more electrocatalytic coatings on a substrate
23.
ELECTRODE FOR GAS EVOLUTION IN ELECTROLYTIC PROCESSES
An electrode for gas evolution in electrolytic processes having a metal substrate and a coating formed on the substrate, the coating having at least a catalytic porous outer layer containing regions of porous nickel oxide dispersed within a solid nickel oxide binder, and a method for the production of the electrode from preformed nickel vanadium oxide particles.
C25B 11/091 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds
C25B 1/04 - Hydrogen or oxygen by electrolysis of water
An electrode for use in an alkaline electrolysis process, the electrode comprising: a metal substrate; a catalytic layer disposed on the metal substrate, the catalytic layer comprising nickel and nickel oxide and having a porosity less than about 1 m2/g; and an active composition disposed both on and within the catalytic layer, the active composition comprising one or more metal compounds selected from a cobalt compound, an iridium compound, a rhodium compound, an iron compound, a platinum compound, a lithium compound and a manganese compound. An alkaline water electrolysis unit comprising the electrode and a method of forming the electrode.
C25B 11/093 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds at least one noble metal or noble metal oxide and at least one non-noble metal oxide
C25B 1/04 - Hydrogen or oxygen by electrolysis of water
C25B 11/053 - Electrodes comprising one or more electrocatalytic coatings on a substrate characterised by multilayer electrocatalytic coatings
C25B 11/056 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material consisting of textile or non-woven fabric
09 - Scientific and electric apparatus and instruments
11 - Environmental control apparatus
Goods & Services
Machines and equipment for the chemical and electrochemical
industry. Scientific and control apparatus and instruments, especially
electrolyzer, electrodes, fuel cells; batteries. Water treatment apparatus and equipment, water treatment
filters, water treatment units, ultraviolet sterilization
equipment, ozone generators for disinfection and water
treatment.
The invention relates to an electrode for gas evolution in electrolytic processes comprising a catalytic coating containing oxides of tin, ruthenium, titanium and one or more elements selected from the group consisting of niobium, tantalum and tungsten applied to a metallic substrate, and a method for its preparation.
C25B 1/46 - Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis in diaphragm cells
C25B 11/052 - Electrodes comprising one or more electrocatalytic coatings on a substrate
C25B 11/093 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds at least one noble metal or noble metal oxide and at least one non-noble metal oxide
09 - Scientific and electric apparatus and instruments
11 - Environmental control apparatus
Goods & Services
Machines and installations for the chemical and
electrochemical industry. Scientific and control apparatus and instruments, in
particular electrolysers, electrodes, fuel cells; batteries. Water treatment apparatus and installations, water treatment
filters, water treatment units, ultraviolet sterilisation
installations, ozone generators for disinfection and water
treatment.
09 - Scientific and electric apparatus and instruments
11 - Environmental control apparatus
Goods & Services
Machines and installations for the chemical and
electrochemical industry. Scientific and control apparatus and instruments, in
particular electrolysers, electrodes, fuel cells; batteries. Water treatment apparatus and installations, water treatment
filters, water treatment units, ultraviolet sterilisation
installations, ozone generators for disinfection and water
treatment.
The present invention relates to a framing structure for an electrolyser subject to internal pressure, able to withstand corrosive environments and radial pressure forces. The present invention also relates to an electrolytic cell and electrolyser equipped with said framing structure, as well as its use in high-pressure water electrolysis applications.
09 - Scientific and electric apparatus and instruments
11 - Environmental control apparatus
Goods & Services
Machines and equipment for the chemical and electrochemical industry, namely, electrolysis machines for generating gas Scientific and control apparatus and instruments, in particular electrolysis apparatus for laboratory use, electrodes, fuel cells; batteries Water treatment apparatus and installations, water treatment filters, water treatment units, ultraviolet sterilisation installations, ozone generators for disinfection and water treatment
09 - Scientific and electric apparatus and instruments
11 - Environmental control apparatus
Goods & Services
Scientific and control apparatus and instruments, in particular electrolysis apparatus for laboratory use, electrodes, fuel cells; batteries Water treatment apparatus and installations, water treatment filters, water treatment units, ultraviolet sterilisation installations, ozone generators for disinfection and water treatment
33.
ELECTRODE FOR GAS EVOLUTION IN ELECTROLYTIC PROCESSES
An electrode for gas evolution in electrolytic processes and a method for the production of such an electrode, the electrode having a metal substrate and a coating formed on the substrate, wherein the coating has at least a highly porous catalytic outer layer containing nickel oxide and nickel hydroxide, the porous outer layer having a surface area of at least 40 m2/g (BET). The catalytic layer is prepared from a Ni oxide/V oxide initial coating with subsequent leaching of V.
C25B 11/077 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of a single catalytic element or catalytic compound the compound being a non-noble metal oxide
C23C 18/12 - Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coatingContact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
C23C 4/08 - Metallic material containing only metal elements
09 - Scientific and electric apparatus and instruments
11 - Environmental control apparatus
Goods & Services
Machines and plants for the chemical and electrochemical industry. Scientific apparatus and instruments and control apparatus and instruments, Especially Electrolysers, Electrodes, Fuel batteries; Batteries. Apparatus and installations, all for use in the treatment of water, Water treatment filters, Water conditioning units, Ultraviolet sterilisation plants, ozonisers for water disinfection and treatment.
Machines and plants for the chemical and electrochemical industry. Apparatus and installations, all for use in the treatment of water, Water treatment filters, Water conditioning units, Ultraviolet sterilisation plants, ozonisers for water disinfection and treatment.
36.
Electrode for electrochemical evolution of hydrogen
An electrode suitable for use as a cathode for the development of hydrogen in industrial electrolytic processes, equipped with a catalytic coating having an external layer containing ruthenium and selenium; and a method for the production of the same.
C25B 11/097 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds comprising two or more noble metals or noble metal alloys
C23C 18/08 - Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coatingContact plating by thermal decomposition characterised by the deposition of metallic material
C25B 9/19 - Cells comprising dimensionally-stable non-movable electrodesAssemblies of constructional parts thereof with diaphragms
C25B 9/70 - Assemblies comprising two or more cells
C25B 11/053 - Electrodes comprising one or more electrocatalytic coatings on a substrate characterised by multilayer electrocatalytic coatings
C25B 1/04 - Hydrogen or oxygen by electrolysis of water
C25B 1/46 - Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis in diaphragm cells
The present invention concerns an anode for oxygen evolution in electrolytic processes comprising a nickel-based planar substrate having a first side and second side and a porous catalytic coating formed on at least one side of said substrate, wherein said porous catalytic coating exhibits a lamellar morphology made from metallic patches and void patches, said metallic patches being made from a material selected from nickel, nickel oxide, a nickel-aluminium alloy, or combinations thereof. The present invention also concerns a method for the production of such an anode using powder plasma spraying or electric wire-arc spraying.
C25B 1/04 - Hydrogen or oxygen by electrolysis of water
C25B 11/03 - ElectrodesManufacture thereof not otherwise provided for characterised by shape or form perforated or foraminous
C25B 11/052 - Electrodes comprising one or more electrocatalytic coatings on a substrate
C25B 11/075 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of a single catalytic element or catalytic compound
C25B 11/077 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of a single catalytic element or catalytic compound the compound being a non-noble metal oxide
C23C 4/00 - Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
C25B 11/091 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds
The intervention relates to an electrolysis unit A fluid manifold system is feeding electrolytic solution into the electrolytic cells and discharging the electrolytic solution out of the electrolytic cells. The cavity of an expandable closing means is pressurized so that its shell expands and the volume of the cavity increases. The expandable closing means is arranged within the fluid manifold system, so that the fluid manifold system is open for the passage of electrolytic solution if the expandable closing means is in a depressurized state and the fluid manifold system is closed for the passage of electrolytic solution if the expandable closing means is in a pressurized state.
A method for surface treatment of a metal substrate, suitable for use as electrode support in electrochemical processes by: (a) immersion of the metal substrate and of at least one counter electrode in an electrolyte selected from hydrochloric acid, nitric acid, boric acid or sulfuric acid at a weight concentration of between 10-40%; (b) application of an anodic current density to the metal substrate of between 0.1 and 30 A/dm2 for a time of between 0.5 and 120 minutes. An electrode for gas evolution in electrochemical processes obtained from a correspondingly treated substrate.
C25B 11/093 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds at least one noble metal or noble metal oxide and at least one non-noble metal oxide
C25B 9/19 - Cells comprising dimensionally-stable non-movable electrodesAssemblies of constructional parts thereof with diaphragms
The invention concerns an electrode for hypochlorite evolution comprising a conductive substrate and a catalytic coating applied over said substrate and a multilayer method for producing the same.
C25B 11/052 - Electrodes comprising one or more electrocatalytic coatings on a substrate
C25B 11/091 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds
41.
METHOD FOR THE ELECTROLYSIS OF WATER AT VARIABLE CURRENT DENSITIES
The present invention concerns a method for alkaline water electrolysis of water in an electrolyzer and an electrolyzer configured to carry out the method, the electrolyzer comprising at least one electrolytic cell having an anodic compartment provided with an anode, a cathodic compartment provided with a cathode, and a separator arranged between said anodic and cathodic compartments. The method comprises selecting a threshold current density such that at operating current densities up to said threshold current density, the migration of hydrogen generated in said cathodic compartment through said separator into said anodic compartment is limited, and at operating current densities above said threshold current density, a migration of oxygen generated in said anodic compartment through said separator into said cathodic compartment is limited.
The present invention relates to an electrode and in particular to an electrode suitable for use as a cathode for hydrogen evolution in industrial electrolytic processes and a method for its preparation. The electrode comprises a metal substrate provided with a catalytic coating, said catalytic coating comprising a first protective layer in direct contact with the substrate, said first protective layer comprising platinum, in the form of metal or its oxides, and a second layer applied on top of said first protective layer, said second layer comprising platinum, palladium and an element selected from the group of rare earths, in the form of metals or their oxides, wherein said second layer comprises 15-40% by weight of platinum and 10-30% by weight of palladium and 40-75% by weight of an element selected from the group of rare earths referred to metals.
C25B 11/093 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds at least one noble metal or noble metal oxide and at least one non-noble metal oxide
The present invention concerns an electrolyser and a method for producing the same. The electrolyser comprises at least two electrolytic cells respectively provided with anodic and cathodic frames where the frames are equipped with feed and discharge channels that reduce stray currents and facilitate cell assembly. The electrolyser may be advantageously employed for high pressure alkaline water electrolysis (AWE).
The present invention concerns an electrode for gas evolution in electrolytic processes comprising a nickel-based metal substrate and a coating formed on said substrate, wherein said coating comprises pre-formed particles of a catalyst material exhibiting a perovskite-type structure dispersed within a nickel-based metal or metal oxide binder. The present invention also concerns a method for the production of such an electrode.
C25B 1/04 - Hydrogen or oxygen by electrolysis of water
C25B 11/077 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of a single catalytic element or catalytic compound the compound being a non-noble metal oxide
C25B 11/052 - Electrodes comprising one or more electrocatalytic coatings on a substrate
C25B 11/056 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material consisting of textile or non-woven fabric
C25B 11/069 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material consisting of at least one single element and at least one compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material consisting of two or more compounds
C25B 11/091 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds
An electrolytic cell equipped with microelectrodes for the generation of un-separated products and the method for obtaining it. The cell and the microelectrodes are obtained using a technology for the production of microelectromechanical systems (MEMS). The anodic and cathodic microelectrodes have an electrocatalytic coating and are mutually intercalated at an interelectrodic gap lower than 300 micrometres.
C25B 11/02 - ElectrodesManufacture thereof not otherwise provided for characterised by shape or form
C23C 14/18 - Metallic material, boron or silicon on other inorganic substrates
C23C 16/06 - Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of metallic material
C23C 16/511 - Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating using electric discharges using microwave discharges
An electrode, having a catalytic coating containing ruthenium and at least one other element selected from the group of alkaline earth metals, suitable to be used in industrial electrochemical processes for hydrogen evolution and to a method for the production of the same. The catalytic coating has 93-99 wt-% of ruthenium and 1-7 wt-% of alkaline earth metals, referred to the metals.
The present invention concerns an electrode for gas evolution in electrolytic processes comprising a metal substrate and a coating formed on said substrate, said coating comprising at least a catalytic porous outer layer containing regions of porous nickel oxide dispersed within a solid nickel oxide binder, and a method for the production of such an electrode from preformed nickel vanadium oxide particles.
C25B 11/069 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material consisting of at least one single element and at least one compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material consisting of two or more compounds
C25B 11/091 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds
48.
ELECTROLYSER FOR ELECTROCHLORINATION PROCESSES AND A SELF-CLEANING ELECTROCHLORINATION SYSTEM
The present invention concerns a chlorination electrolyser comprising, a housing provided with an inlet and an outlet suitable for the circulation of brine; at least one pair of bipolar electrodes facing each other and positioned within said housing. The electrolyser is characterised in that each bipolar electrode of said at least one pair comprises: a valve metal substrate; an active coating comprising at least one layer of a catalytic composition comprising ruthenium and titanium disposed over said substrate; a top coating comprising at least one layer of a composition comprising oxides of tantalum, niobium, tin, or combinations thereof disposed over said active coating. The invention also concerns a self-cleaning electrochlorination system comprising such an electrolyser, a method for its production, its use in normal and low salinity pools for hypochlorite mediated water disinfection and a method for hypochlorite-mediated water disinfection.
09 - Scientific and electric apparatus and instruments
Goods & Services
Electrolysers for use in the production of hydrogen and oxygen, electrolysers for water electrolysis; Multiple cell stacks; Multiple stack modular systems; Self-sufficient systems for the production of hydrogen and oxygen.
The present invention concerns an electrode for use in an alkaline electrolysis process, the electrode comprising: a metal substrate; a catalytic layer disposed on the metal substrate, the catalytic layer comprising nickel and nickel oxide and having a porosity less than about 1 m2/g; and an active composition disposed both on and within the catalytic layer, the active composition comprising one or more metal compounds selected from the group consisting of a cobalt compound, an iridium compound, a rhodium compound, an iron compound, a platinum compound, a lithium compound and a manganese compound. The invention also concerns an alkaline water electrolysis unit comprising the electrode and a method of forming the electrode.
C25B 11/091 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds
C25B 11/093 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds at least one noble metal or noble metal oxide and at least one non-noble metal oxide
C23C 4/00 - Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
C25B 11/053 - Electrodes comprising one or more electrocatalytic coatings on a substrate characterised by multilayer electrocatalytic coatings
C25B 11/056 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material consisting of textile or non-woven fabric
52.
ELECTRODE FOR GAS EVOLUTION IN ELECTROLYTIC PROCESSES
The present invention concerns an electrode for gas evolution in electrolytic processes and a method for the production of such an electrode, the electrode comprising a metal substrate and a coating formed on said substrate, wherein said coating comprises at least a highly porous catalytic outer layer containing nickel oxide and nickel hydroxide, said porous outer layer having a surface area of at least 40 m2/g (BET). The catalytic layer is prepared from a Ni oxide/V oxide initial coating with subsequent leaching of V.
C25B 11/091 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds
C25B 1/04 - Hydrogen or oxygen by electrolysis of water
C25B 11/069 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material consisting of at least one single element and at least one compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material consisting of two or more compounds
C23C 4/00 - Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
C23C 18/00 - Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coatingContact plating
53.
ELECTRODE FOR ELECTROCHEMICAL EVOLUTION OF HYDROGEN
The present invention relates to an electrode and in particular to an electrode suitable for use as a cathode for the development of hydrogen in industrial electrolytic processes, equipped with a catalytic coating comprising an external layer containing ruthenium and selenium; and to a method for the production of the same.
C25B 1/04 - Hydrogen or oxygen by electrolysis of water
C25B 1/46 - Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis in diaphragm cells
C25B 11/053 - Electrodes comprising one or more electrocatalytic coatings on a substrate characterised by multilayer electrocatalytic coatings
C25B 11/093 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds at least one noble metal or noble metal oxide and at least one non-noble metal oxide
An electrode for evolution of gas in electrolytic processes having a substrate of valve metal and a catalytic coating having two layers. A first layer having oxides of valve metal, ruthenium and iridium and a second layer having one or more metals chosen from amongst elements of the platinum group.
C25B 11/093 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds at least one noble metal or noble metal oxide and at least one non-noble metal oxide
C25B 9/23 - Cells comprising dimensionally-stable non-movable electrodesAssemblies of constructional parts thereof with diaphragms comprising ion-exchange membranes in or on which electrode material is embedded
An electrode for electrolytic processes, in particular to an anode suitable for oxygen evolution having a valve metal substrate, a catalytic layer, a protection layer consisting of oxides of valve metals interposed between the substrate and the catalytic layer and an outer coating of oxides of valve metals. The electrode is particularly suitable for processes of cathodic electrodeposition of chromium from an aqueous solution containing Cr (III).
C25B 11/093 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds at least one noble metal or noble metal oxide and at least one non-noble metal oxide
C25D 3/06 - ElectroplatingBaths therefor from solutions of chromium from solutions of trivalent chromium
C25C 1/10 - Electrolytic production, recovery or refining of metals by electrolysis of solutions of iron group metals, refractory metals or manganese of chromium or manganese
C25D 3/04 - ElectroplatingBaths therefor from solutions of chromium
56.
METHOD FOR THE TREATMENT OF A METAL SUBSTRATE FOR THE PREPARATION OF ELECTRODES
The present invention concerns a method for surface treatment of a metal substrate, suitable for use as electrode support in electrochemical processes, comprising the following steps: (a) immersion of said metal substrate and of at least one counter electrode in an electrolyte selected from hydrochloric acid, nitric acid, boric acid or sulfuric acid at a weight concentration of between 10-40%; (b) application of an anodic current density to said metal substrate of between 0,1 and 30 A/dm2 for a time of between 0.5 and 120 minutes. The invention also concerns an electrode for gas evolution in electrochemical processes obtained from a correspondingly treated substrate.
C25B 11/093 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds at least one noble metal or noble metal oxide and at least one non-noble metal oxide
57.
ELECTRODE FOR THE ELECTROPLATING OR ELECTRODEPOSITION OF A METAL
An electrode for electroplating or electrodeposition of a metal and to the method for obtaining the same is provided. The electrode has a conductive substrate, at least one layer of an electrochemically active coating placed on the substrate, and at least one topcoating layer of valve metal.
The invention relates to a process for obtaining a electrode usable as a anode in electrolytic cells for the production of chlorine. The electrode thus obtained comprises a catalytic layer containing oxides of tin, ruthenium, iridium and titanium applied to a substrate of a valve metal.
C25B 11/081 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of a single catalytic element or catalytic compound the element being a noble metal
C23C 18/02 - Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coatingContact plating by thermal decomposition
C23C 18/12 - Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coatingContact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
C25B 9/23 - Cells comprising dimensionally-stable non-movable electrodesAssemblies of constructional parts thereof with diaphragms comprising ion-exchange membranes in or on which electrode material is embedded
The present invention relates to an electrode, comprising a catalytic coating containing ruthenium and at least one other element selected from the group of alkaline earth metals, suitable to be used in industrial electrochemical processes for hydrogen evolution and to a method for the production of the same. The catalytic coating comprises 93-99 wt-% of ruthenium and 1-7 wt-% of alkaline earth metals, referred to the metals.
C25B 9/18 - Assemblies comprising a plurality of cells
C25B 11/04 - ElectrodesManufacture thereof not otherwise provided for characterised by the material
C25B 1/46 - Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis in diaphragm cells
The present invention relates to an electrode for electrochlorination processes, optionally operable under polarity reversal conditions, comprising an active layer provided with a doped Ru—Ti catalytic composition.
C25B 11/093 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds at least one noble metal or noble metal oxide and at least one non-noble metal oxide
To provide an electrolysis electrode having a more preferable shape in electrolyzing pure water, an alkali aqueous solution, or an aqueous solution of an alkali metal chloride at a lower voltage than ever before, and an electrolyzer using the same. An electrolysis electrode or the like including: a metal perforated plate having a value of Factor V of 40 or more represented by the following formula; Factor V = Rs × Rc × F/100000, in which Rs is a planar direction surface area per unit area 1 dm2[cm2/dm2], Rc is a thickness direction surface area per unit area 1 dm2[cm2/dm2], and F is the number of mesh apertures per unit area 1 dm2(fine degree) [number/dm2].
The invention relates to an electrode for evolution of gas in electrolytic processes comprising a substrate of valve metal and a catalytic coating comprising two layers. A first layer comprising oxides of valve metal, ruthenium and iridium and a second layer comprising one or more metals chosen from amongst elements of the platinum group.
C25B 11/04 - ElectrodesManufacture thereof not otherwise provided for characterised by the material
C25B 1/46 - Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis in diaphragm cells
63.
Electrodic support structure for coaxial electrolytic cells
An electrodic support structure for coaxial electrolytic cells suitable for operating in both monopolar and bipolar configuration is provided. The electrode support structure has a support plane made of an isolating material provided with a plurality of housing seats suitable for housing a plurality of electrodes arranged homothetically to each other, and a partition member made of insulating material, provided with a plurality of electrode positioning means, integral with or mechanically connected to the support plane and arranged orthogonally thereto.
Provided is an alkaline water electrolyzer in which leakage of aqueous alkali solutions is prevented.
The alkaline water electrolyzer 10 includes an anode chamber frame 11 defining an anode chamber 12; a cathode chamber frame 17 defining a cathode chamber 18; a porous diaphragm 16 disposed between the anode and cathode chamber frames 11 and 17 and partitioning the anode and cathode chambers 12 and 18; an anode gasket 15 disposed on the anode chamber frame 11; and a cathode gasket 21 disposed on the cathode chamber frame 17, wherein when the anode and cathode chamber frames 11 and 17 are fastened, the porous diaphragm 16 is held between the anode and cathode chamber frames 11 and 17 via the anode and cathode gaskets 15 and 21 and the anode and cathode gaskets 15 and 21 are in contact with each other around the peripheral edge of the porous diaphragm 16 by compressing the anode and cathode gaskets 15 and 21.
The invention relates to an electrode for electroplating or electrodeposition of a metal and to the method for obtaining the same. The electrode comprises a conductive sub- strate, at least one layer of an electrochemically active coating placed on said substrate, and at least one topcoating layer of valve metal.
C23C 18/08 - Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coatingContact plating by thermal decomposition characterised by the deposition of metallic material
C23C 18/12 - Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coatingContact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
The present invention relates to an electrode for electrochlorination processes, optionally operable under polarity reversal conditions, comprising an active layer provided with a doped Ru—Ti catalytic composition.
C25B 11/093 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds at least one noble metal or noble metal oxide and at least one non-noble metal oxide
C02F 103/42 - Nature of the water, waste water, sewage or sludge to be treated from bathing facilities, e.g. swimming pools
C02F 1/461 - Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
C02F 1/467 - Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection
The invention relates to a process for obtaining a electrode usable as a anode in electrolytic cells for the production of chlorine. The electrode thus obtained comprises a catalytic layer containing oxides of tin, ruthenium, iridium and titanium applied to a substrate of a valve metal.
C25B 11/04 - ElectrodesManufacture thereof not otherwise provided for characterised by the material
C23C 18/12 - Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coatingContact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
The invention relates to a coating for providing protection against interstitial corrosion for titanium surfaces such as flanges or other equipment used in highly aggressive electrolytic environments, for example hydrochloric acid electrolysis cells. The coating according to the invention comprises a passivating layer, on which a film of water-repellent material is applied. The invention further relates to a method for providing anticorrosive protection for flanges of electrochemical cells.
C09D 127/18 - Homopolymers or copolymers of tetrafluoroethene
C23C 18/12 - Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coatingContact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
C25B 9/00 - Cells or assemblies of cellsConstructional parts of cellsAssemblies of constructional parts, e.g. electrode-diaphragm assembliesProcess-related cell features
69.
System and method for treatment of wastewater via enhanced electroflotation
A method for treating wastewater involves electrolyzing a stream of seawater and wastewater mix within one or more electrolytic cells mounted outside a batch tank. The electrolyzed stream is piped to a quelling chamber which is mounted above the batch tank. A diluted polymer solution is injected at upstream of an in-line mixer piping into the quelling chamber substantially concurrently with the electrolyzed stream. The polymer solution and the electrolyzed stream are dispersed as a fine shower over residual seawater and wastewater in the batch tank. The polymer solution facilitates flocculation of the suspended solid particles and creates a distinct buoyant layer of flocculated solid particles attached with micro bubbles. A substantially clarified effluent is separated from the flocculated layer and neutralized prior to discharge. The flocculated layer is pumped from the batch tank to a dewatering system where entrained solids are compacted to a desired level. A centrate generated during the solids/sludge dewatering step is recirculated to the batch tank prior to addition of seawater during a subsequent treatment cycle as a supplement to the seawater.
The present invention relates to an electrode for electrochlorination processes, optionally operable under polarity reversal conditions, comprising an active layer provided with a doped Ru-Ti catalytic composition.
The invention relates to an electrode which can be employed in the cells of plants for the electrolytic extraction of copper and other non-ferrous metals from ionic solutions. The electrode consists of an apparatus comprising at least one anodic panel for the evolution of oxygen or chlorine connected through a plurality of resistors in parallel to at least one distribution structure for electrical current. The panel may optionally exhibit areas of electrical discontinuity. The invention also relates to an electrolyser using the electrode described above.
Safe anode for electrochemical cells, of the type of vertical anodes constituted of a hanging structure based on a first horizontal bar, second vertical distribution bars defined by a copper or aluminum core with a titanium exterior layer, and coated or uncoated titanium anode plates attached to the second distribution bars, on both sides, such that the safe anode incorporates an adapter element that comprises, at least, one current limiter assembly, arranged between, at least, one of the second vertical distribution bars, and, at least, one coated or uncoated titanium anode plate, connecting the vertical distribution bar to the coated or uncoated titanium anode plate.
Provided is an alkaline water electrolysis device which prevents an alkaline aqueous solution from leaking. This alkaline water electrolysis device 10 has: a positive electrode chamber frame 11 for defining a positive electrode chamber 12; a negative electrode chamber frame 17 for defining a negative electrode chamber 18; and a porous diaphragm 16 which is disposed between the positive electrode chamber frame 11 and the negative electrode chamber frame 17, and partitions a space into the positive electrode chamber 12 and the negative electrode chamber 18, wherein: a positive electrode gasket 15 is disposed on the positive electrode chamber frame 11; a negative electrode gasket 21 is disposed on the negative electrode chamber frame 17; and when the positive electrode chamber frame 11 and the negative electrode chamber frame 17 are fastened, the porous diaphragm 16 is sandwiched between the positive electrode chamber frame 11 and the negative electrode chamber frame 17 with the positive electrode gasket 15 and the negative electrode gasket 21 therebetween, the positive electrode gasket 15 and the negative electrode gasket 21 are compressed, and the positive electrode gasket 15 and the negative electrode gasket 21 contact each other at a circumferential end portion of the porous diaphragm 16.
C25B 9/00 - Cells or assemblies of cellsConstructional parts of cellsAssemblies of constructional parts, e.g. electrode-diaphragm assembliesProcess-related cell features
C25B 9/08 - Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms
C25B 13/02 - DiaphragmsSpacing elements characterised by shape or form
74.
Continuous electrolysis method with electrolytic bath for polysulfide production and electrolysis device for implementing the same
An electrolysis method of preventing the voltage of an electrolytic bath from rising over time without halting electrolysis and an electrolysis device for executing the method are provided such that: in operation of a two-compartment electrolytic bath, which has a membrane partitioning an anode compartment from a cathode compartment and in which a sulfide ion-containing white liquor for use in a pulp production process is fed into the anode compartment while direct current is supplied to the electrolytic bath to produce polysulfide in the anode compartment through electrolysis, and a sulfide ion-containing white liquor for use in a pulp production process that contains at least one of a scale cleaning agent and a scale inhibitor is fed to the anode compartment.
The invention relates to an electrodic support structure for coaxial electrolytic cells suitable for operating in both monopolar and bipolar configuration. The electrode support structure comprises a support plane made of an isolating material provided with a plurality of housing seats suitable for housing a plurality of electrodes arranged homothetically to each other, and a partition member made of insulating material, provided with a plurality of electrode positioning means, integral with or mechanically connected to the support plane and arranged orthogonally thereto.
A method for treating wastewater involves electrolyzing a stream of seawater and wastewater mix within one or more electrolytic cells mounted outside a batch tank. The electrolyzed stream is piped to a quelling chamber which is mounted above the batch tank. A diluted polymer solution is injected at upstream of an in-line mixer piping into the quelling chamber substantially concurrently with the electrolyzed stream. The polymer solution and the electrolyzed stream are dispersed as a fine shower over residual seawater and wastewater in the batch tank. The polymer solution facilitates flocculation of the suspended solid particles and creates a distinct buoyant layer of flocculated solid particles attached with micro bubbles. A substantially clarified effluent is separated from the flocculated layer and neutralized prior to discharge. The flocculated layer is pumped from the batch tank to a dewatering system where entrained solids are compacted to a desired level. A centrate generated during the solids/sludge dewatering step is recirculated to the batch tank prior to addition of seawater during a subsequent treatment cycle as a supplement to the seawater.
An electrode on valve metal substrate suitable for the evolution of oxygen in electrolytic processes is provided with a coating having a catalytic layer containing platinum group metals and one or more protective layers based on tin oxide modified with a doping element selected from bismuth, antimony or tantalum and with a small amount of ruthenium. The electrode is useful in processes of non-ferrous metal electrowinning.
C25C 7/00 - Constructional parts, or assemblies thereof, of cellsServicing or operating of cells
C25B 1/00 - Electrolytic production of inorganic compounds or non-metals
C25B 9/00 - Cells or assemblies of cellsConstructional parts of cellsAssemblies of constructional parts, e.g. electrode-diaphragm assembliesProcess-related cell features
C25B 9/16 - Cells or assemblies of cells comprising at least one electrode made of particles; Assemblies of constructional parts thereof
C25B 11/04 - ElectrodesManufacture thereof not otherwise provided for characterised by the material
Safe anode for electrochemical cells, of the type of vertical anodes constituted of a hanging structure based on a first horizontal bar, second vertical distribution bars defined by a copper or aluminum core with a titanium exterior layer, and coated or uncoated titanium anode plates attached to the second distribution bars, on both sides, such that the safe anode incorporates an adapter element that comprises, at least, one current limiter assembly, arranged between, at least, one of the second vertical distribution bars, and, at least, one coated or uncoated titanium anode plate, connecting the vertical distribution bar to the coated or uncoated titanium anode plate.
An electrode suitable as chlorine-evolving anode in electrolytic cells and a method for obtaining thereof is provided. The electrode has a metal substrate coated with a catalytic composition made of thin layers based on oxides of tin, iridium and ruthenium and combines excellent characteristics of anodic potential and selectivity with respect to the reaction of chlorine evolution without resorting to the use of dopants such as platinum and palladium.
C25B 11/093 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds at least one noble metal or noble metal oxide and at least one non-noble metal oxide
82.
Electrode for electrochlorination processes and method of manufacturing thereof
The invention relates to an electrode suitable for electrolytic treatments of dilute solutions of sodium chloride even at low temperatures. The electrode can be used in the generation of active chlorine-based biocidal agents in ballast water for marine applications. The electrode has a titanium substrate, an inner catalytic coating containing oxides of tantalum, ruthenium and iridium, and an outer catalytic coating containing oxides of titanium, ruthenium and of at least one of nickel, iron and cobalt.
The invention relates to an electrode which can be employed in the cells of plants for the electrolytic extraction of copper and other non-ferrous metals from ionic solutions. The electrode consists of an apparatus comprising at least one anodic panel for the evolution of oxygen or chlorine connected through a plurality of resistors in parallel to at least one distribution structure for electrical current. The panel may optionally exhibit areas of electrical discontinuity. The invention also relates to an electrolyser using the electrode described above.
High density polyethylene (HDPE) underdrain filter for
sewage; underdrain filter for water purification by gravity
or filtration; plastic water filtration apparatus for use in
water purification plant; underdrain block filter for
drinking water and desalination pre-treatment.
85.
Catalytic or electrocatalytic generation of chlorine dioxide
The present invention concerns an electrode element having a valve metal substrate, a first catalyst component applied to said substrate, said first catalyst component suitable for evolving oxygen from an aqueous solution under anodic polarization, a second catalyst component suitable for generating chlorine dioxide from a chlorate solution in acidic environment; said first and second catalyst component being electrically insulated from each other. The inventions also concern an electrolytic cell having such an electrode element and a process for the generation of chlorine dioxide on a catalyst component an electrochemical cell comprising such an electrode element.
The invention relates to a coating for providing protection against interstitial corrosion for titanium surfaces such as flanges or other equipment used in highly aggressive electrolytic environments, for example hydrochloric acid electrolysis cells. The coating according to the invention comprises a passivating layer, on which a film of water-repellent material is applied. The invention further relates to a method for providing anticorrosive protection for flanges of electrochemical cells.
High density polyethylene (HDPE) underdrain filter for sewage; underdrain filter for water purification by gravity or filtration; plastic water filtration apparatus for use in water purification plant; underdrain block filter for drinking water and desalination pre-treatment.
(1) High density polyethylene (HDPE) underdrain filter for sewage; underdrain filter for water purification by gravity and filtration; underdrain plastic water filter for use in water purification plant; underdrain block filter for drinking water and desalination pre-treatment.
89.
ELECTRODIC APPARATUS FOR THE ELECTRODEPOSITION OF NON-FERROUS METALS
This invention relates to electrodic apparatus suitable for the electrodeposition of nonferrous metals, for example for the electrolytic production of copper and other nonferrous metals from solutions of ions, comprising an electrode and at least one ionpermeable screen intended for protection of the said electrode.
high density polyethylene (HDPE) underdrain filter for sewage; underdrain filter for water purification by gravity or filtration; plastic water filtration apparatus for use in water purification plant; underdrain block filter for drinking water and desalination pre-treatment
An anodic structure for electrowinning cells having an anode hanger bar, a support structure of insulating material, at least one anode mesh having a valve metal substrate provided with a catalytic coating, said at least one anode being subdivided into at least two reciprocally insulated sub-meshes, said sub-meshes being individually supplied with electrical current through conductive means connected with said anode hanger bar, the anodic structure being further provided with at least one electronic system having at least one current probe and at least one actuator for individually measuring and controlling current supply to each of said sub-meshes.
The present invention relates to an electrode structure which can detect the electric current and optionally activate alarm signals in electrolytic cells for the electrodeposition of non-ferrous metals, for example for electrowinning of metals, in particular for the electrolytic production of copper and other non-ferrous metals proceeding from ionic solutions. The present invention further relates to a data acquisition system to be used in connection with said electrode structure.
An electrode on valve metal substrate suitable for the evolution of oxygen in electrolytic processes is provided with a coating comprising a catalytic layer containing platinum group metals and one or more protective layers based on tin oxide modified with a doping element selected from bismuth, antimony or tantalum and with a small amount of ruthenium. The electrode is useful in processes of non-ferrous metal electrowinning.
An electrolytic enrichment method for heavy water includes enriching heavy water by electrolysis using an alkaline water electrolysis cell including an anode chamber that holds an anode, a cathode chamber that holds a cathode, and a diaphragm. In the method, an electrolyte prepared by adding high-concentration alkaline water to raw material water containing heavy water is circularly supplied to the anode chamber and the cathode chamber from a circulation tank; an anode-side gas-liquid separator and an anode-side water-seal device are connected to the anode chamber, and a cathode-side gas-liquid separator and a cathode-side water-seal device are connected to the cathode chamber; and electrolysis is continued while the alkali concentration in the electrolyte supplied to both electrolysis chambers is maintained at a constant concentration by circularly supplying, to the circulation tank, the electrolyte from which the gas generated from the anode-side gas-liquid separator and the cathode-side gas-liquid separator is separated.
The invention relates to an electrochemical cell partitioned by a cation-exchange membrane suitable for production of high purity hydrogen and oxygen by electrolysis of alkaline solutions comprising a cathode in form of porous web including a platinum or palladium catalyst. The cell can be used as an element of a modular filter-press electrolyzer.
C25B 1/04 - Hydrogen or oxygen by electrolysis of water
C25B 9/73 - Assemblies comprising two or more cells of the filter-press type
C25B 9/23 - Cells comprising dimensionally-stable non-movable electrodesAssemblies of constructional parts thereof with diaphragms comprising ion-exchange membranes in or on which electrode material is embedded
C25B 11/081 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of a single catalytic element or catalytic compound the element being a noble metal
The diaphragm according to the present invention is provided with a porous support and a polymer porous film impregnated in the support from one surface of the support. When one surface of the porous film is specified as A, the surface on the reverse side thereof from the surface A is specified as B, a cross section of the porous film parallel to the surface A and the surface B is specified as the cross section C, the average pore diameter in the surface A is specified as DA, the average pore diameter in the surface B is specified as DB, and the average pore diameter in the cross section C is specified as DC, the average pore diameter DA and the average pore diameter DB are essentially the same, and the average pore diameter DC is greater than the average pore diameter DA and the average pore diameter DB. When a cross section or surface parallel to the surface A and the surface B in an impregnated region of the porous film is specified as face S, and the average pore diameter in the face S is specified as DS, the average pore diameter DS is equal to or greater than the average pore diameter DA or the average pore diameter DB and is less than a lower-limit value of the bubble diameter distribution of bubbles generated at an electrode in alkaline water electrolysis.
C25B 13/02 - DiaphragmsSpacing elements characterised by shape or form
C25B 1/10 - Electrolytic production of inorganic compounds or non-metals of hydrogen or oxygen by electrolysis of water in diaphragm cells
C25B 9/00 - Cells or assemblies of cellsConstructional parts of cellsAssemblies of constructional parts, e.g. electrode-diaphragm assembliesProcess-related cell features
C25B 13/08 - DiaphragmsSpacing elements characterised by the material based on organic materials
97.
Diaphragm-electrode assembly for use in alkaline water electrolysers
An assembly of a porous gas-evolving electrode and a porous separator diaphragm, suitable for use in a water electrolyzer operating with an alkaline electrolyte is disclosed. A water electrolyzer having the gas-evolving electrode component of the assembly arranged as the cathode allows manufacturing hydrogen with a purity exceeding 99.8%.
The invention relates to an assembly of a porous gas-evolving electrode and a porous separator diaphragm, suitable for use in a water electrolyser operating with an alkaline electrolyte. A water electrolyser having the gas-evolving electrode component of the assembly arranged as the cathode allows manufacturing hydrogen with a purity exceeding 99.8%.
A bipolar electrolytic cell particularly useful for electrochemical processes carried out with periodic reversal of polarity is provided. The cell is equipped with a series of concentric electrode pairs, the innermost pair and the outermost pair being connected to the poles of a DC generator and the intermediate pairs acting as bipolar electrodes. The different pairs of electrodes are arranged and connected in such a way that, at each stage of the process, the overall cathodic area is equal to the anodic area.
C25B 9/06 - Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
C02F 1/461 - Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
C02F 1/467 - Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection
C25C 7/00 - Constructional parts, or assemblies thereof, of cellsServicing or operating of cells
C25B 1/46 - Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis in diaphragm cells
C25B 9/20 - Assemblies comprising a plurality of cells of the filter-press type
A three-compartment cell for production of oxidising disinfectant solutions is provided. The intermediate compartment of the cell is separated from the anodic compartment by a fibrous diaphragm in intimate contact with an anion-exchange membrane.
C02F 1/46 - Treatment of water, waste water, or sewage by electrochemical methods
C25B 9/10 - Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms including an ion-exchange membrane in or on which electrode material is embedded
C02F 1/461 - Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
C25B 15/08 - Supplying or removing reactants or electrolytesRegeneration of electrolytes
C25B 9/08 - Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms
C25B 13/04 - DiaphragmsSpacing elements characterised by the material
C25B 11/03 - ElectrodesManufacture thereof not otherwise provided for characterised by shape or form perforated or foraminous
C25B 11/04 - ElectrodesManufacture thereof not otherwise provided for characterised by the material
C25B 13/02 - DiaphragmsSpacing elements characterised by shape or form
C25B 13/08 - DiaphragmsSpacing elements characterised by the material based on organic materials
C02F 1/469 - Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
