Abrégé

The present invention pertains to a paper strength enhancer which imparts paper strength to finished paper in a papermaking step, and provides a paper strength enhancer which is easy to handle and can reduce logistics cost while maintaining a high paper strength effect. In view of ensuring handleability during production or use, achieving a high concentration of conventional paper strength enhancers in the form of an aqueous solution has been difficult. The problem can be solved by adding, as a paper strength enhancer, a water-soluble polymer obtained by subjecting a monomer mixture aqueous solution containing a specific monomer composition to water droplet-in-oil emulsion polymerization in the presence of a surfactant. The paper strength enhancer has improved handleability, high concentration, and high dispersibility and can also be easily dissolved due to excellent solubility, compared to conventional products.

Classes IPC  ?

• D21H 21/18 - Agents de renforcement
• C08F 2/32 - Polymérisation dans des émulsions eau-dans-l'huile
• C08F 220/18 - Esters des alcools ou des phénols monohydriques des phénols ou des alcools contenant plusieurs atomes de carbone avec l'acide acrylique ou l'acide méthacrylique
• C08F 220/56 - AcrylamideMéthacrylamide
• D21H 17/45 - Groupes contenant de l'azote

Abrégé

Provided are a method for recovering gold, in which gold is recovered from a solution containing a gold cyano complex using a crosslinked resin containing a vinyl amine unit, by which gold can be efficiently recovered from the solution not only in a case (A) where a concentration of the gold cyano complex in the solution is low but also in a case (B) where another metal is dissolved in the solution; a method for recovering gold, in which the crosslinked resin and the solution are brought into contact with each other to separate the crosslinked resin and the solution from each other, by which gold can be efficiently recovered from the solution not only in the case (A) but also in the case (B); and a gold recovery facility comprising: a container inside which the crosslinked resin is accommodated in a flowable manner; and a device which feeds the solution to the container, by which gold can be efficiently recovered from the solution not only in the case (A) but also in the case (B).

Classes IPC  ?

• C22B 11/00 - Obtention des métaux nobles
• C22B 3/24 - Traitement ou purification de solutions, p. ex. de solutions obtenues par lixiviation par des procédés physiques, p. ex. par filtration, par des moyens magnétiques par adsorption sur des substances solides, p. ex. par extraction avec des résines solides
• C22B 3/26 - Traitement ou purification de solutions, p. ex. de solutions obtenues par lixiviation par extraction liquide-liquide utilisant des composés organiques

Abrégé

The purpose of the present invention is to provide a treatment method by which, even for wastewater with organic constituents constituting a large portion of organic wastewater as a whole and suspended solids (SS) and with a large negative charge ratio, organic nitrogen constituents and phosphorus compounds can be efficiently separated and collected and good-quality separated water can be obtained by reducing the quantity of SS, BOD, COD, and nitrogen constituents in the separated water. Provided is a treatment method for organic waste water, in which a flock is formed by adding a polymer flocculant to organic waste water with organic nitrogen constituent content in relation to suspended solids (SS) being 4-50%/SS and organic nitrogen constituent content being 250-50,000 mg/L, and thereafter, the flock is separated from the organic wastewater by solid-liquid separation.

Classes IPC  ?

• C02F 1/54 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par floculation ou précipitation d'impuretés en suspension utilisant des produits organiques
• C02F 1/52 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par floculation ou précipitation d'impuretés en suspension
• C05B 15/00 - Engrais organiques phosphatés
• C08L 33/14 - Homopolymères ou copolymères des esters d'esters contenant des atomes d'halogène, d'azote, de soufre ou d'oxygène en plus de l'oxygène du radical carboxyle
• C08L 45/00 - Compositions contenant des homopolymères ou des copolymères de composés ne possédant pas de radicaux aliphatiques non saturés dans une chaîne latérale et contenant une ou plusieurs liaisons doubles carbone-carbone dans un système carbocyclique ou hétérocycliqueCompositions contenant des dérivés de tels polymères
• A23K 20/26 - Composés de phosphore
• C02F 101/10 - Composés inorganiques
• C02F 101/38 - Composés organiques contenant de l'azote

Abrégé

An iminodiacetic acid type chelate resin which can be easily and efficiently produced and which can efficiently adsorb and separate metal ions; and a method for producing the same are developed. The use of a chelate rein having a carboxymethyl group introduced into primary amino groups of the polyvinylamine crosslinked polymer particles can facilitate the efficient adsorption and separation of metal ions in water. The chelate resin can be obtained by a production method in which an N-vinyl carboxylic acid amide is suspension polymerized with a crosslinkable monomer in salt water in the presence of a dispersant thereby to obtain a polyvinyl carboxylic acid amide crosslinked polymer particles, and the obtained polyvinyl carboxylic acid amide crosslinked polymer is hydrolyzed to thereby introduce a carboxymethyl group into primary amino groups of the polyvinylamine crosslinked polymer particles.

Classes IPC  ?

• C08F 8/00 - Modification chimique par post-traitement
• B01J 45/00 - Échange d'ions dans lequel se forme un complexe ou un chélateUtilisation d'une substance comme échangeur d'ions formant des complexes ou des chélatesTraitement d'une substance en vue d'améliorer ses propriétés d'échange d'ions formant des complexes ou des chélates

Abrégé

A method for efficiently producing polyvinylamine crosslinked polymer particles by simple operation without using an organic solvent is provided. In the present invention, polyvinylamine crosslinked polymer particles can be produced by performing suspension polymerization in salt water containing N-vinylcarboxylic acid amide and a polyvinyl compound in the presence of a dispersant to obtain particles of a polyvinyl carboxylic acid amide crosslinked polymer and subsequently hydrolyzing the polyvinyl carboxylic acid amide crosslinked polymer. Divinylbenzene is preferred as the polyvinyl compound. N-Vinylcarboxylic acid amide, acrylonitrile, and a polyvinyl compound may be used.

Classes IPC  ?

• C08F 8/12 - Hydrolyse
• C08F 220/54 - Amides
• C08F 2/18 - Polymérisation en suspension
• C08F 212/36 - Divinylbenzène
• C08F 226/02 - Copolymères de composés contenant un ou plusieurs radicaux aliphatiques non saturés, chaque radical ne contenant qu'une seule liaison double carbone-carbone et l'un au moins étant terminé par une liaison simple ou double à l'azote ou par un hétérocycle contenant de l'azote par une simple ou une double liaison à l'azote
• B01J 20/26 - Composés macromoléculaires synthétiques

Abrégé

To develop: an iminodiacetic acid type chelate resin which is able to be easily and efficiently produced and is capable of efficiently adsorbing and separating metal ions; and a method for producing this iminodiacetic acid type chelate resin. Metal ions in water are able to be efficiently adsorbed and separated by using a chelate resin in which a carboxymethyl group is introduced into a primary amino group of polyvinylamine crosslinked polymer particles. This chelate resin is able to be obtained by a production method wherein polyvinyl carboxylic acid amide crosslinked polymer particles are obtained by suspension polymerizing an N-vinyl carboxylic acid amide and a crosslinkable monomer in salt water in the presence of a dispersant, and the polyvinyl carboxylic acid amide crosslinked polymer is subsequently hydrolyzed, thereby introducing a carboxymethyl group into a primary amino group of the polyvinylamine crosslinked polymer particles.

Classes IPC  ?

• C08F 8/00 - Modification chimique par post-traitement
• B01J 45/00 - Échange d'ions dans lequel se forme un complexe ou un chélateUtilisation d'une substance comme échangeur d'ions formant des complexes ou des chélatesTraitement d'une substance en vue d'améliorer ses propriétés d'échange d'ions formant des complexes ou des chélates

Abrégé

　The present invention provides an adjuvant having a higher immunity boosting capability and lower viscosity than conventional polymer adjuvants such as Carbopol (registered trademark). More specifically, the present invention provides: an adjuvant including an acrylic acid polymer; a vaccine composition containing said adjuvant, and an immunogen to be administered for immunization; and a method for administering said vaccine composition to a non-human mammal.

Classes IPC  ?

• A61K 39/39 - Préparations médicinales contenant des antigènes ou des anticorps caractérisées par les additifs immunostimulants, p. ex. par les adjuvants chimiques
• A61K 39/002 - Antigènes de protozoaires
• A61K 39/02 - Antigènes bactériens
• A61K 39/12 - Antigènes viraux

Abrégé

Provided is a method for efficiently producing polyvinylamine crosslinked polymer particles by simple operation without using an organic solvent. According to the present invention, polyvinylamine crosslinked polymer particles are able to be produced by subjecting a salt water containing an N-vinyl carboxylic acid amide and a polyvinyl compound to suspension polymerization in the presence of a dispersant, thereby obtaining polyvinyl carboxylic acid amide crosslinked polymer particles, and by subsequently hydrolyzing the polyvinyl carboxylic acid amide crosslinked polymer. Divinyl benzene is preferable as the polyvinyl compound. Alternatively, an N-vinyl carboxylic acid amide, acrylonitrile and a polyvinyl compound may be used.

Classes IPC  ?

• C08F 8/12 - Hydrolyse
• C08F 2/18 - Polymérisation en suspension
• C08F 212/36 - Divinylbenzène
• C08F 226/02 - Copolymères de composés contenant un ou plusieurs radicaux aliphatiques non saturés, chaque radical ne contenant qu'une seule liaison double carbone-carbone et l'un au moins étant terminé par une liaison simple ou double à l'azote ou par un hétérocycle contenant de l'azote par une simple ou une double liaison à l'azote

Abrégé

A water-in-oil emulsion is a product form having many practical advantages. A vinylamine-based macromolecule having specific effects as papermaking chemicals and a flocculant is provided in the form of a water-in-oil emulsion having good storage stability and high performance as a flocculation treatment agent. Disclosed is a flocculation treatment agent including a water-in-oil emulsion of a water-soluble macromolecule that is produced by subjecting a water-in-oil emulsion of an aqueous poly-N-vinylcarboxylic acid amide solution coexisting with a polyoxyalkylene alkyl ether to hydrolysis in the presence of an acid or a base. Preferably, the polyoxyalkylene alkyl ether is added before the hydrolysis reaction.

Classes IPC  ?

• C02F 1/56 - Composés macromoléculaires
• B01D 21/01 - Séparation par sédimentation de particules solides en suspension dans des liquides en utilisant des agents de floculation
• C08F 8/12 - Hydrolyse
• C08L 39/02 - Homopolymères ou copolymères de la vinylamine
• C08L 71/02 - Oxydes des polyalkylènes
• D21H 21/18 - Agents de renforcement
• D21C 5/02 - Préparation à partir de vieux papiers
• D21H 17/34 - Composés macromoléculaires synthétiques obtenus par des réactions faisant intervenir uniquement des liaisons non saturées carbone-carbone
• D21H 17/37 - Polymères d'acides non saturés ou de leurs dérivés, p. ex. polyacrylates
• D21H 17/00 - Matériaux non fibreux ajoutés à la pâte caractérisés par leur constitutionMatériaux d'imprégnation du papier caractérisés par leur constitution
• D21H 21/20 - Agents de résistance à l'état humide
• C08F 126/02 - Homopolymères de composés contenant un ou plusieurs radicaux aliphatiques non saturés, chaque radical ne contenant qu'une seule liaison double carbone-carbone et l'un au moins étant terminé par une liaison simple ou double à l'azote ou par un hétérocycle contenant de l'azote par une simple ou une double liaison à l'azote
• C08F 2/32 - Polymérisation dans des émulsions eau-dans-l'huile
• D21H 21/10 - Agents de rétention ou produits améliorant l'égouttage
• D21H 21/16 - Agents de collage ou hydrophobes
• C02F 11/14 - Traitement des boues d'égoutDispositifs à cet effet par déshydratation, séchage ou épaississement avec addition de produits chimiques
• C08L 33/26 - Homopolymères ou copolymères de l'acrylamide ou de la méthacrylamide
• C02F 101/30 - Composés organiques

Abrégé

Provided is a water-in-oil type emulsion that has a high storage stability and exhibits an excellent performance as a flocculation treatment agent, wherein a vinylamine polymer capable of expressing specific effects as a papermaking agent or a flocculation agent is formulated into the water-in-oil type emulsion having a number of practical advantages. The flocculation treatment agent according to the present invention comprises a water-in-oil type emulsion of a water soluble polymer, said water-in-oil type emulsion being prepared by hydrolyzing, in the presence of an acid or a base, a water-in-oil type emulsion of an aqueous solution of an N-vinylcarboxylic amide polymer in which a polyoxyalkylene alkyl ether coexists. It is preferred that the polyoxyalkylene alkyl ether is added before the hydrolysis reaction.

Classes IPC  ?

• B01D 21/01 - Séparation par sédimentation de particules solides en suspension dans des liquides en utilisant des agents de floculation
• C02F 1/56 - Composés macromoléculaires
• C02F 11/14 - Traitement des boues d'égoutDispositifs à cet effet par déshydratation, séchage ou épaississement avec addition de produits chimiques
• C08F 8/12 - Hydrolyse
• C08L 39/02 - Homopolymères ou copolymères de la vinylamine
• C08L 71/02 - Oxydes des polyalkylènes
• D21H 21/10 - Agents de rétention ou produits améliorant l'égouttage
• D21H 21/18 - Agents de renforcement

Abrégé

Provided is a composition that comprises an ionic water-soluble polymer which exhibits dilatancy and an emulsion. According to the present invention, this can be achieved by a composition comprising the following components (A), (B) and (C), and an emulsion with a fluidity that can be adjusted by external stimulation can be provided. (A) A water-soluble ionic polymer which has an ionic group density of 2 meq/g or more. (B) A water-soluble ionic polymer which has an ionic property opposite to that of (A) and an ionic group density of 1 meq/g or less. (C) An oil-in-water emulsion.

Classes IPC  ?

• C08L 101/02 - Compositions contenant des composés macromoléculaires non spécifiés caractérisées par la présence de groupes déterminés
• A61K 8/06 - Émulsions
• A61K 8/81 - Cosmétiques ou préparations similaires pour la toilette caractérisés par la composition contenant des composés organiques macromoléculaires obtenus par des réactions faisant intervenir uniquement des liaisons insaturées carbone-carbone

Abrégé

The purpose of the present invention is to provide a precast gel for electrophoresis, which can be used for analyzing the state of phosphorylation modification of a protein, can use a Laemmli's or Schagger's electrophoresis buffer solution for which the analysis method has been in widespread use, and can be used by a user ecomonically and efficiently. In the present invention, the purpose can be achieved by a precast gel for electrophoresis, characterized by being an aqueous acrylamide copolymer gel that has a specific structure in at least a part of the structure thereof and contains a buffer solution having the composition (1) and the property (2): (1) tris(hydroxymethyl)aminomethane and/or bis(2-hydroxyethyl)iminotris(hydroxymethyl)methane, and at least one amphoteric electrolyte; and (2) a pH value of 6.0 to 6.8.

Classes IPC  ?

• G01N 27/447 - Systèmes utilisant l'électrophorèse

Abrégé

In the present invention, a hydrophilic polymer comprising a water-in-oil emulsion in the form of a liquid is aggregated by emulsion-breaking and the aggregate is pelletized and dried to provide a pulverulent hydrophilic polymer. As the emulsion breaker, it is possible to use an ionic surfactant, a non-ionic surfactant having an HLB value of 11 to 20, or an oil-soluble polymer compound having a hydrophilic group and a hydrophobic group. The pulverulent hydrophilic polymer obtained by this method exhibits excellent effects as a flocculation treatment agent.

Classes IPC  ?

• C08J 3/16 - Pulvérisation ou granulation par coagulation de dispersions
• C08F 2/32 - Polymérisation dans des émulsions eau-dans-l'huile
• C08F 220/56 - AcrylamideMéthacrylamide

Abrégé

By oxidatively decomposing an ion exchange resin or waste ion exchange resin having a sulfonic acid group, a carboxyl group, a quaternary ammonium group or the like or a water absorbent resin having a carboxyl group with an oxidant in an adequate amount under adequate reaction conditions, the resin can be converted into a water-soluble ionic polymer. According to the present invention, a water-soluble ionic polymer can be obtained with high yield from waste ion exchange resins that have rarely been reused, and thus the above-mentioned resins are reusable as water-soluble ionic polymers.

Classes IPC  ?

• C08J 11/16 - Récupération ou traitement des résidus des polymères par coupure des chaînes moléculaires des polymères ou rupture des liaisons de réticulation par voie chimique, p. ex. dévulcanisation par traitement avec une substance inorganique
• C08F 8/06 - Oxydation
• C08J 3/05 - Production de solutions, dispersions, latex ou gel par d'autres procédés que ceux utilisant les techniques de polymérisation en solution, en émulsion ou en suspension dans un milieux aqueux à partir de polymères solides

Abrégé

A coagulant comprising a soluble amidine polymer which can be produced at low cost is provided without using a conventional process for coagulant production in which an N-vinylcarboxamide is used and this results in a high cost. This coagulant is usable in the treatment of the water obtained by sludge dehydration from municipal sewage or industrial wastewater, treatment of dyeing wastewater, treatment of raw water for tap water, treatment of a waste-paper dispersion containing ink particles to be separated (deinking treatment), and treatment of a papermaking feedstock before papermaking. The coagulant is further usable as an internal additive for papermaking and applicable to a color additive in coating materials for ink-jet printing paper. This coagulant comprises a water-soluble polymer having specific repeating units which has been produced by subjecting a copolymer of (meth)acrylamide and (meth)acrylonitrile to the Hofmann reaction, subsequently neutralizing the resultant polymer with an acid, and heat-treating the polymer. Also provided is a method of coagulation with the coagulant.

Classes IPC  ?

• B01D 21/01 - Séparation par sédimentation de particules solides en suspension dans des liquides en utilisant des agents de floculation
• C02F 1/56 - Composés macromoléculaires
• C08F 8/18 - Introduction d'atomes d'halogène ou de groupes contenant des halogènes
• C08F 220/44 - Acrylonitrile
• C08F 220/56 - AcrylamideMéthacrylamide

Abrégé

Provided is an additive for a hair cosmetic that imparts a supple finished texture, which comprises a graft copolymer obtained by graft copolymerizing a cationic water-soluble monomer and a nonionic water-soluble monomer in an aqueous solution containing a natural polymer and/or a natural polymer derivative having OH groups. Also provided is a hair cosmetic containing the additive for a hair cosmetic. 　

Classes IPC  ?

• A61K 8/81 - Cosmétiques ou préparations similaires pour la toilette caractérisés par la composition contenant des composés organiques macromoléculaires obtenus par des réactions faisant intervenir uniquement des liaisons insaturées carbone-carbone
• A61Q 5/00 - Préparations pour les soins des cheveux
• A61Q 5/04 - Préparations pour onduler de façon permanente ou décrêper les cheveux
• A61Q 5/06 - Préparations pour mettre les cheveux en forme, p. ex. pour mettre en forme ou colorer temporairement
• A61Q 5/10 - Préparations pour la teinture permanente des cheveux ou des poils
• A61Q 5/12 - Préparations contenant des agents de conditionnement des cheveux
• C08F 251/00 - Composés macromoléculaires obtenus par polymérisation de monomères sur des polysaccharides ou leurs dérivés
• A61K 8/60 - SucresLeurs dérivés
• A61K 8/64 - ProtéinesPeptidesLeurs dérivés ou produits de dégradation
• A61Q 5/02 - Préparations pour le lavage des cheveux
• C08B 11/08 - Alkyl ou cycloalkyléthers à radicaux hydrocarbonés substitués à radicaux hydrocarbonés hydroxylésLeurs esters, éthers ou acétals
• C08B 37/00 - Préparation des polysaccharides non prévus dans les groupes Leurs dérivés

Abrégé

Provided are a manual valve having a simple structure, of low cost, and reliably prevented from being opened and closed by accidental or erroneous operation of a handle, a container adapted for placing a liquid product therein and provided with the manual valve, a production device provided with the manual valve, and a method of preventing opening and closing of the manual valve. A manual valve (1A) has a lock member (2A) mounted and fixed to the outer side thereof. The lock member (2A) is provided with a fixed section (3) mounted and fixed to the outer side of the manual valve, a rotatable support section (6) connected to the fixed section (3) through a hinge (7), and a handle lock section (8) either fixedly or rotatably mounted to the front end of the support section (6).

Classes IPC  ?

• F16K 35/06 - Dispositions empêchant la mise en action accidentelle ou non autorisée utilisant un organe de commande ou de verrouillage démontable, p. ex. une clé
• F16K 35/00 - Dispositions empêchant la mise en action accidentelle ou non autorisée
• F16K 35/10 - Dispositions empêchant la mise en action accidentelle ou non autorisée par chapeaux ou barres de verrouillage

Abrégé

Disclosed is a precast gel for electrophoresis, which comprises a support and a water-absorbing gel filled in the support, wherein the water-absorbing gel is produced by the polymerization of an aqueous solution comprising a radical-polymerizable monomer, a crosslinkable monomer, a buffer solution, a redox initiator comprising an oxidizing agent/a reducing agent, and a photosensitizer and has a pH value ranging from 6.0 to 7.5 by the irradiation with light. The slab gel for electrophoresis enables to produce a precast gel for electrophoresis within a shorter time and in a simpler manner compared with a conventional technique. Therefore, it becomes possible to produce a precast gel for electrophoresis having high productivity, high cost-performance and high quality, which is highly industrially applicable.

Classes IPC  ?

• G01N 27/447 - Systèmes utilisant l'électrophorèse

Abrégé

The invention relates to a flocculant composition which has an excellent ability to adsorb suspended particles, does not cause an increase in the viscosity of sludge, provides good water drainage and can decrease a moisture content in cake upon mechanical dewatering, and can be applied to a wide variety of sludge, which is obtained by utilizing advantages of a crosslinking water-soluble polymer and a linear water-soluble polymer, and changing a mixing ratio of the crosslinking water-soluble polymer and the linear water-soluble polymer using a state of the particle size distribution of sludge particles as an indicator, and a process for producing the same. That is, it is a flocculant composition comprising (A) a vinyl polymer type crosslinking water-soluble polymer with a charge inclusion ratio of 20% or more and (B) a vinyl polymer type linear water-soluble polymer with a charge inclusion ratio of 5% or more and less than 20%. It is preferred that in response to the change of the mass percentage of 200 mesh-on particles in sludge to the total suspended particles in the sludge, the mixing of the (A) vinyl polymer type crosslinking water-soluble polymer with a charge inclusion ratio of 20% or more and the (B) vinyl polymer type linear water-soluble polymer with a charge inclusion ratio of 5% or more and less than 20% in the flocculant composition is changed.

Classes IPC  ?

• B01D 21/01 - Séparation par sédimentation de particules solides en suspension dans des liquides en utilisant des agents de floculation
• C02F 11/14 - Traitement des boues d'égoutDispositifs à cet effet par déshydratation, séchage ou épaississement avec addition de produits chimiques
• C08F 2/32 - Polymérisation dans des émulsions eau-dans-l'huile
• C08L 33/14 - Homopolymères ou copolymères des esters d'esters contenant des atomes d'halogène, d'azote, de soufre ou d'oxygène en plus de l'oxygène du radical carboxyle
• C08L 33/26 - Homopolymères ou copolymères de l'acrylamide ou de la méthacrylamide

Produits et services

Chemicals, adhesives (not for stationery or household purposes), plant growth regulating preparations.

Abrégé

A water-in-oil emulsion is a product form having many
practical advantages. A vinylamine-based macromolecule having
specific effects as papermaking chemicals and a flocculant is
provided in the form of a water-in-oil emulsion having good storage
stability and high performance as a flocculation treatment agent.
Disclosed is a flocculation treatment agent including a
water-in-oil emulsion of a water-soluble macromolecule that is
produced by subjecting a water-in-oil emulsion of an aqueous
poly-N-vinylcarboxylic acid amide solution coexisting with a
polyoxyalkylene alkyl ether to hydrolysis in the presence of an
acid or a base. Preferably, the polyoxyalkylene alkyl ether is
added before the hydrolysis reaction.

Classes IPC  ?

• B01D 21/01 - Séparation par sédimentation de particules solides en suspension dans des liquides en utilisant des agents de floculation
• C02F 1/56 - Composés macromoléculaires
• C08F 8/12 - Hydrolyse
• C08J 3/09 - Production de solutions, dispersions, latex ou gel par d'autres procédés que ceux utilisant les techniques de polymérisation en solution, en émulsion ou en suspension dans des liquides organiques
• C08L 39/02 - Homopolymères ou copolymères de la vinylamine
• C08L 71/02 - Oxydes des polyalkylènes

Abrégé

A method for efficiently producing polyvinylamine
crosslinked polymer particles by simple operation without
using an organic solvent is provided. In the present
invention, polyvinylamine crosslinked polymer particles can
be produced by performing suspension polymerization in salt
water containing N-vinylcarboxylic acid amide and a
polyvinyl compound in the presence of a dispersant to
obtain particles of a polyvinyl carboxylic acid amide
crosslinked polymer and subsequently hydrolyzing the
polyvinyl carboxylic acid amide crosslinked polymer.
Divinylbenzene is preferred as the polyvinyl compound.
N-Vinylcarboxylic acid amide, acrylonitrile, and a polyvinyl
compound may be used.

Classes IPC  ?

• C08F 2/18 - Polymérisation en suspension
• C08F 8/12 - Hydrolyse
• C08F 212/36 - Divinylbenzène
• C08F 226/02 - Copolymères de composés contenant un ou plusieurs radicaux aliphatiques non saturés, chaque radical ne contenant qu'une seule liaison double carbone-carbone et l'un au moins étant terminé par une liaison simple ou double à l'azote ou par un hétérocycle contenant de l'azote par une simple ou une double liaison à l'azote

Abrégé

To develop: an iminodiacetic acid type chelate resin which is able to be easily and efficiently produced and is capable of efficiently adsorbing and separating metal ions; and a method for producing this iminodiacetic acid type chelate resin. Metal ions in water are able to be efficiently adsorbed and separated by using a chelate resin in which a carboxymethyl group is introduced into a primary amino group of polyvinylamine crosslinked polymer particles. This chelate resin is able to be obtained by a production method wherein polyvinyl carboxylic acid amide crosslinked polymer particles are obtained by suspension polymerizing an N-vinyl carboxylic acid amide and a crosslinkable monomer in salt water in the presence of a dispersant, and the polyvinyl carboxylic acid amide crosslinked polymer is subsequently hydrolyzed, thereby introducing a carboxymethyl group into a primary amino group of the polyvinylamine crosslinked polymer particles.

Classes IPC  ?

• B01J 45/00 - Échange d'ions dans lequel se forme un complexe ou un chélateUtilisation d'une substance comme échangeur d'ions formant des complexes ou des chélatesTraitement d'une substance en vue d'améliorer ses propriétés d'échange d'ions formant des complexes ou des chélates
• C08F 8/00 - Modification chimique par post-traitement