Abstract

The present invention relates to iron oxide particles, consisting of a core and a coating, wherein the core is essentially selected from FeO(OH), Fe2O3, or Fe3O4, and mixtures thereof, and the coating comprises a polysiloxane coating, wherein the polysiloxane coating is present in an amount of 0.1% to 10% by weight based on the weight of the core.

IPC Classes  ?

• C04B 14/30 - Oxides other than silica
• C04B 20/10 - Coating or impregnating
• C09C 1/24 - Oxides of iron

Abstract

The present invention relates to a process for the production of LiFePO4 powder, comprising the steps: a) providing an aqueous solution of an organic surfactant; b) providing an aqueous solution of an iron (II) salt and mixing said aqueous iron (II) salt solution with an aqueous solution of a phosphate, to provide a mixed iron (II) salt/phosphate solution having a stoichiometric ratio of Fe2+:phosphate of about 1 : 1; c) adding the mixed iron (II) salt/phosphate solution to the surfactant solution under constant stirring; d) providing an aqueous solution comprising a lithium salt, adding said aqueous solution comprising a lithium salt to said mixed iron (II) salt/phosphate solution to provide a mixture having a stoichiometric ratio of Fe2+:phosphate:lithium salt of about 1 :1 :3 and stirring the resulting mixture; e) heating the resulting mixture at 80-200 °C; f) washing the resulting precipitate to remove excess surfactant, filtering and drying the precipitate; and g) heat treating the dried precipitate in an inert atmosphere by firing at 550-850 °C for at least 2 hours, wherein a co-solvent is added during or after any one of steps (a) to (d).

IPC Classes  ?

• C01B 25/45 - Phosphates containing plural metal, or metal and ammonium
• H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
• H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
• H01M 4/136 - Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy

Abstract

The present invention is directed to a granulate having photocatalytic activity, comprising particles of an inorganic particulate material coated with a photocatalytically active compound for introducing photocatalytic activity into or on building materials. The invention is further related to the manufacture of such a granulate and its use into or on building materials such as cement, concrete, gypsum and/or limestone and water-based coatings or paints for reducing an accumulation and growth of microorganisms and environmental polluting substances on these materials and thus reducing the tendency of fouling, while the brilliance of the color is maintained and the quality of the air is improved.

IPC Classes  ?

• B01D 53/56 - Nitrogen oxides
• B01D 53/86 - Catalytic processes
• B01J 8/00 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes
• B01J 23/00 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group
• B01J 21/00 - Catalysts comprising the elements, oxides or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium or hafnium
• B01J 29/00 - Catalysts comprising molecular sieves
• B01J 37/00 - Processes, in general, for preparing catalystsProcesses, in general, for activation of catalysts
• C01B 21/00 - NitrogenCompounds thereof
• C09C 1/00 - Treatment of specific inorganic materials other than fibrous fillers Preparation of carbon black
• C09C 1/44 - Carbon
• C09C 1/36 - Compounds of titanium
• C09C 1/22 - Compounds of iron

Abstract

The present invention is directed to a process for the manufacture of iron oxide particles coated with crystalline titanium dioxide, wherein the process comprises the steps of adding an aqueous solution of at least one titanyl salt to an iron oxide dispersion to form a reaction mixture, precipitating titanium dioxide on said iron oxide particles by adding an alkali, wherein the titanium dioxide is at least partially in a crystalline form, and isolating the resulting titanium dioxide-containing iron oxide particles from the reaction mixture. The invention is further related to iron oxide particles comprising precipitated crystalline titanium dioxide and the use of the resulting photocatalytically active material.

IPC Classes  ?

• B01J 23/70 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the iron group metals or copper

Abstract

The present invention is directed to a granulate having photocatalytic activity, comprising particles of an inorganic particulate material coated with a photocatalytically active compound for introducing photocatalytic activity into or on building materials. The invention is further related to the manufacture of such a granulate and its use into or on building materials such as cement, concrete, gypsum and/or limestone and water-based coatings or paints for reducing an accumulation and growth of microorganisms and environmental polluting substances on these materials and thus reducing the tendency of fouling, while the brilliance of the colour is maintained and the quality of the air is improved.

IPC Classes  ?

• C04B 20/10 - Coating or impregnating
• C04B 20/12 - Multiple coating or impregnating

Abstract

The invention relates to the use of iron oxide particles coated with titanium dioxide, and in particular to their use for decomposing air pollutants photocatalytically. The invention is further directed to the use of iron oxide particles being at least partially coated with titanium dioxide, for photocatalytically decomposing air pollutants selected from nitrogen oxides (NOx) and volatile organic compounds (VOC), that come into contact with said particles.

IPC Classes  ?

• C04B 20/10 - Coating or impregnating
• B01J 21/06 - Silicon, titanium, zirconium or hafniumOxides or hydroxides thereof
• B01J 23/745 - Iron
• B01J 35/00 - Catalysts, in general, characterised by their form or physical properties
• C09D 5/14 - Paints containing biocides, e.g. fungicides, insecticides or pesticides

Abstract

The present invention relates to a process for producing red iron oxide with only marginal goethite content, wherein a ferrous chloride feedstock is employed as starting material. The process comprises precipitating lepidocrocite seeds having a high BET surface area by mixing the ferrous chloride feedstock with an alkali and oxidizing the obtained mixture, and growing the lepidocrocite seeds, whereby the lepidocrocite converts into red iron oxide.

IPC Classes  ?

• C01G 49/02 - OxidesHydroxides
• C01G 49/06 - Ferric oxide [Fe2O3]

Abstract

The present invention is directed to a process for the manufacture of iron oxide particles coated with crystalline titanium dioxide, wherein the process comprises the steps of adding an aqueous solution of at least one titanyl salt to an iron oxide dispersion to form a reaction mixture, precipitating titanium dioxide on said iron oxide particles by adding an alkali, wherein the titanium dioxide is at least partially in a crystalline form, and isolating the resulting titanium dioxide-containing iron oxide particles from the reaction mixture. The invention is further related to iron oxide particles comprising precipitated crystalline titanium dioxide and the use of the resulting photocatalitycally active material.

IPC Classes  ?

• B01J 21/06 - Silicon, titanium, zirconium or hafniumOxides or hydroxides thereof
• B01J 23/745 - Iron
• B01J 35/00 - Catalysts, in general, characterised by their form or physical properties
• C01G 49/00 - Compounds of iron
• C01G 49/02 - OxidesHydroxides
• C04B 35/00 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products
• C09C 1/24 - Oxides of iron

Goods & Services

titanium dioxides for use in cosmetics, plastics, paints and chemicals