Methods of reducing or removing solids from liquids. The methods may include contacting a liquid in which solids are suspended with a polymer and a surface active agent. The surface active agent and the polymer may act synergistically to increase settling rates of the suspended solids. A liquid subjected to the methods may be obtained from a leaching process.
C02F 1/26 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par extraction
C02F 11/147 - Traitement des boues d'égoutDispositifs à cet effet par déshydratation, séchage ou épaississement avec addition de produits chimiques utilisant des substances organiques
B01D 21/01 - Séparation par sédimentation de particules solides en suspension dans des liquides en utilisant des agents de floculation
C22B 3/26 - Traitement ou purification de solutions, p. ex. de solutions obtenues par lixiviation par extraction liquide-liquide utilisant des composés organiques
Methods of solvent extraction are provided, including methods that exhibit improved phase disengagement times or reduced crud. The methods may include contacting an aqueous phase and/or an organic phase with a phase disengagement agent. The phase disengagement agent may improve a phase disengagement time. The methods may include contacting an aqueous phase and/or an organic phase with a crud reducing agent.
This invention generally relates to methods of defoaming talc froth, talc purification methods, and metal purification methods. In particular, the disclosure provides methods of defoaming talc froth and suppressing and settling talc solids using polyamine-based talc defoamers capable of depressing talc, thereby improving talc froth defoaming rates, improving pumpability, reducing froth overflow, improving the clarity of recovered water from which talc has been removed, and allowing for recovered water to be reused in beneficiation of mined ore. The disclosed methods are especially suitable in hydro-metallurgical base metal extraction processes for nickel and copper flotation, as well as in any other industrial processes for which defoaming and depression of talc is desired.
The present invention generally relates to methods and compositions for manufacture of tissue, paper, or board and for enhancing retention and drainage thereof. In particular, the disclosure provides methods for enhancing retention and drainage by addition of a retention and drainage aid comprising quick inversion cationic emulsion polyacrylamides (QIC-EPAMS) and polyvinylamine (PVAm) polymers Preparation of paper sheets under these conditions provides improved retention, gravimetric drainage rates, and DDA drainage time, without over-flocculation and allowed for significant decrease in PVAm dosage.
D21H 11/16 - Pâte ou papier comprenant des fibres de cellulose ou de lignocellulose uniquement d'origine naturelle modifiés par un post-traitement particulier
D21H 17/54 - Composés macromoléculaires synthétiques obtenus par des réactions autres que celles faisant intervenir uniquement des liaisons non saturées carbone-carbone obtenus par des réactions formant une liaison contenant de l'azote dans la chaîne principale de la macromolécule
5.
ONE-PASS DEOXYGENATION METHOD FOR POLYACRYLAMIDE PRODUCTION
The present invention relates to a method and apparatus for degassing a monomer composition. In particular, the disclosure provides a method and apparatus for deoxygenation of monomer solutions during transfer from monomer holding tank to reactor. Degassing occurs in one pass by combining a jet of nitrogen with a monomer solution in a Venturi Injector. The inventive degassing methods and apparatus provide enhanced degassing performance.
The present invention generally relates to compositions and methods for preparation of high reaction temperature dry polyacrylamide (DPAM) polymers. In particular, the disclosure provides methods for adiabatic redox initiated free-radical polymerization of reaction mixtures comprising at least acrylamide monomers, optional free-radical scavenger stabilizers, azo initiators, and redox initiators under pH and initial temperature conditions that allow heat of polymerization to increase reaction temperatures to above 100 °C (Tmax > 100 °C). Gel polymerization under these conditions produces anionic DPAM polymers for use in variety of industrial applications with improved standard viscosity and high water-solubility.
This invention generally relates to high concentration water based defoaming compositions and methods of use thereof, as well as a method for preparing a high concentration water based defoaming composition. In particular, the disclosure provides defoaming compositions that are especially suitable in pulp and paper industry, as well as in any other processing industry when foaming is unwanted. The inventive high concentration water based defoaming compositions provide enhanced defoaming performance and display high stability.
The present invention generally relates to methods and compositions for manufacture of tissue, paper, or board and for enhancing retention and drainage thereof. In particular, the disclosure provides methods for enhancing retention and drainage by addition of a retention and drainage aid comprising reactive cationic polymers (e.g., cationic strength resins), water-soluble amphoteric terpolymers, and optionally anionic organic or inorganic microparticles. Preparation of paper sheets under these conditions provides improved retention, drainage time, STFI and burst strength, and improved hydrophobic particle control.
The present invention relates to compositions and methods for forming substantially bio-based barrier coatings suitable for application on paper and board substrates, and paper and board substrates on which are applied one or more layers of such substantially bio-based barrier coatings. The inventive bio-based barrier coatings comprise a biowax emulsion comprising one or more biowaxes, such as castor oil wax, formed by hydrogenation of a bio-based oil, such as castor oil. The barrier coating composition is formed by dispersing a biowax emulsion into a polyhydroxyalkanoate (PHA) dispersion, and may be applied as a coating e.g., on paper or board, e.g., those comprised of recycled fibers, using conventional industrial methods at ambient temperatures.
D21H 21/14 - Matériaux non fibreux ajoutés à la pâte, caractérisés par leur fonction, leur forme ou leurs propriétésMatériaux d'imprégnation ou de revêtement du papier, caractérisés par leur fonction, leur forme ou leurs propriétés caractérisés par leur fonction ou leurs propriétés dans, ou sur, le papier
The present invention relates to compositions and methods for forming substantially bio-based barrier coatings on paper and board substrates. The inventive bio-based barrier coatings comprise a biowax emulsion comprising one or more biowaxes, such as castor oil wax, formed by hydrogenation of a bio-based oil, such as castor oil. The barrier coating composition is formed by dispersing a biowax emulsion into a polyacrylate carrier dispersion, and may be applied as a coating e.g., on paper or board, e.g., those comprised of recycled fibers, using conventional industrial methods at ambient temperatures.
D21H 21/14 - Matériaux non fibreux ajoutés à la pâte, caractérisés par leur fonction, leur forme ou leurs propriétésMatériaux d'imprégnation ou de revêtement du papier, caractérisés par leur fonction, leur forme ou leurs propriétés caractérisés par leur fonction ou leurs propriétés dans, ou sur, le papier
The present invention relates to compositions and methods for preparation of stable alkenyl succinic anhydride (ASA) sizing emulsions which potentially may be used in the manufacturing of paper and board. In particular, the disclosure provides methods for dual emulsification of ASA using a cationic polymer as the primary emulsification agent and cationic starch as the secondary emulsification agent which provides for considerable reduction in overall starch utilization compared to conventional natural polymer ASA emulsification applications. The present invention also relates to processes for producing high ash paper and board using these ASA sizing emulsions.
D21H 21/14 - Matériaux non fibreux ajoutés à la pâte, caractérisés par leur fonction, leur forme ou leurs propriétésMatériaux d'imprégnation ou de revêtement du papier, caractérisés par leur fonction, leur forme ou leurs propriétés caractérisés par leur fonction ou leurs propriétés dans, ou sur, le papier
12.
SURFACTANT COMPOSITIONS DERIVED FROM WASTE STREAMS, AND METHODS
Compositions, such as surfactant compositions, and methods of forming compositions, such as surfactant compositions, which may include a gemini surfactant. The methods may use a starting material from a waste stream from another process.
C07C 215/08 - Composés contenant des groupes amino et hydroxy liés au même squelette carboné ayant des groupes hydroxy et des groupes amino liés à des atomes de carbone acycliques du même squelette carboné le squelette carboné étant saturé et acyclique avec un seul groupe hydroxy et un seul groupe amino liés au squelette carboné
C07C 217/08 - Composés contenant des groupes amino et hydroxy éthérifiés liés au même squelette carboné ayant des groupes hydroxy éthérifiés et des groupes amino liés à des atomes de carbone acycliques du même squelette carboné le squelette carboné étant acyclique et saturé ayant un seul groupe hydroxy éthérifié et un seul groupe amino liés au squelette carboné, qui n'est pas substitué par ailleurs l'atome d'oxygène du groupe hydroxy éthérifié étant lié de plus à un atome de carbone acyclique
C07C 219/06 - Composés contenant des groupes amino et hydroxy estérifiés liés au même squelette carboné ayant des groupes hydroxy estérifiés et des groupes amino liés à des atomes de carbone acycliques du même squelette carboné le squelette carboné étant acyclique et saturé les groupes hydroxy étant estérifiés par des acides carboxyliques ayant les groupes carboxyle estérifiants liés à des atomes d'hydrogène ou à des atomes de carbone acycliques d'un squelette carboné acyclique saturé
C07C 219/20 - Composés contenant des groupes amino et hydroxy estérifiés liés au même squelette carboné ayant des groupes hydroxy estérifiés et des groupes amino liés à des atomes de carbone acycliques du même squelette carboné le squelette carboné étant non saturé
C11D 1/18 - Esters des acides sulfoniques ou de l'acide sulfuriqueLeurs sels dérivés d'aminoalcools
A polyester surfactant includes a condensation esterification product of a) a polyhydric alcohol, b) a dimer or trimer of an C2 to C42 acid, and c) polyethylene glycol and polypropylene glycol. The polyhydric alcohol is selected from glycerol, arabitol, sorbitol, sorbitan, mannitol, mannitan, erythritol, pentaerythritol, or mixtures thereof. The polyester surfactant is used for deinking, for example, printed waste paper. A method for deinking includes a step of contacting an aqueous pulp slurry with the addition of a composition comprising a polyester surfactant.
The present invention relates to cost-effective and environmentally friendly polyester surfactants for use in flotation deinking. The improved ink collection of the present invention can result in deinked pulp of high quality and/or yields that has excellent brightness and effective residual ink concentration values.
The present invention relates to a cost-effective and environmentally friendly polymeric defoamer formulation for use in various industrial applications that does not contain oil, EBS or free silicone.
A paper adhesive composition includes a cationic non-crosslinked acidified solution of a polyamidoamine with the repeating units
3 is a divalent hydrocarbon radical derived from a dibasic carboxylic acid. Also disclosed are methods of creping paper with the composition.
D21H 11/00 - Pâte ou papier comprenant des fibres de cellulose ou de lignocellulose uniquement d'origine naturelle
D21H 13/00 - Pâte ou papier comprenant des fibres synthétiques cellulosiques ou non cellulosiques ou des matériaux formant des nappes
D21H 15/00 - Pâte ou papier comprenant des fibres ou des matériaux formant des nappes caractérisés autrement que par leur constitution chimique
D21H 17/00 - Matériaux non fibreux ajoutés à la pâte caractérisés par leur constitutionMatériaux d'imprégnation du papier caractérisés par leur constitution
D21H 21/00 - Matériaux non fibreux ajoutés à la pâte, caractérisés par leur fonction, leur forme ou leurs propriétésMatériaux d'imprégnation ou de revêtement du papier, caractérisés par leur fonction, leur forme ou leurs propriétés
D21H 23/00 - Procédés ou appareils pour l'addition de matériaux à la pâte ou au papier
D21H 25/00 - Post-traitement du papier non prévu dans les groupes
D21H 27/00 - Papier particulier non prévu ailleurs, p. ex. obtenu par des procédés multi-étapes
B31F 1/14 - Crêpage à l'aide de racles placées dans le sens transversal de la bande
The present invention provides methods for deinking printed waster paper—particularly methods that use a deinking composition that includes a hydrophobically-modified inorganic particle (“MIP”) to improve ink collection efficiency under traditional alkaline, reduced alkali, and true neutral deinking conditions. Deinking compositions are provided that include a hydrophobically-MIP substrate, a nonionic surfactant, and a fatty acid, or mixtures thereof. The improved ink collection of the present invention can result in deinked pulp of high quality and/or yields that has excellent brightness and effective residual ink concentrations (“ERIC”) values.
The present invention relates to cost-effective and environmentally friendly polyester surfactants containing a condensation esterification product of a polyhydric alcohol, a multimeric acid, and at least one polyalkylene glycol for use in flotation deinking under traditional alkaline, reduced alkali, and true neutral deinking conditions. The polyester deinking surfactants of the present invention will effectively exhibit greater selectivity than traditional flotation deinking surfactants. In particular, the polyester deinking surfactants can give better foam control, improved yield, and no loss in ERIC reduction.
Processes for forming ferric chloride solutions that are stable at relatively low temperatures and suitable for transportation without precipitation are provided. The stable ferric chloride solutions have an iron content of 16 to 23 weight percent and a hydrochloric acid content of 10 to 17 weight percent, wherein the ferric chloride solution is a stable solution and/or reversibly freezes at -10°C. Also disclosed are processes for reconstituting the stable ferric chlorides solutions to provide a final iron content of 10 to 14 weight percent and lower the concentration of hydrochloric acid contained therein.
The present invention relates to a cost-effective and environmentally friendly polymeric defoamer formulation for use in various industrial applications that does not contain oil, EBS or free silicone.
01 - Produits chimiques destinés à l'industrie, aux sciences ainsi qu'à l'agriculture
Produits et services
Chemicals, namely, ferric hydrate and ferric sulfate compositions, used to lower ammonia emissions and sequester soluble phosphorous in animal litter or bedding materials
