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公开(公告)号：AT139713T
公开(公告)日：1996-07-15
申请号：AT92104191
申请日：1992-03-11
Applicant: TORAY INDUSTRIES
Inventor： TAKAHASHI SERIYA , FUJII YOSHISHIGE , UEMURA TADAHIRO
Abstract: A process of producing a composite semipermeable membrane with high performance, which does not involve a highly ignitable solvent or a chlorofluorocarbon solvent which destructs the environment is disclosed. In the process of the present invention, a polyfunctional amine solution and a polyfunctional acid halide solution in a hydrocarbon-based solvent with a flash point of not lower than 10 C are applied on a surface of a microporous substrate to allow interfacial polycondensation reaction so as to form a cross-linked polyamide-based ultra-thin membrane superposed on the microporous substrate. Then a gas is blown on the surface of the ultra-thin membrane so as to evaporate the hydrocarbon-based solvent, which gas has a velocity at the surface of 2 - 20 m/sec., a temperature of 10 - 80 C that is lower than the flash point of the hydrocarbon-based solvent, and an absolute humidity of not less than 1 g of water per 1 kg of dry gas.
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公开(公告)号：DE68916023T2
公开(公告)日：1995-01-26
申请号：DE68916023
申请日：1989-09-29
Applicant: TORAY INDUSTRIES
Inventor： HIMESHIMA YOSHIO , TANISUGI HIDEAKI , WATANABE TETSUO , UEMURA TADAHIRO , KURIHARA MASARU
Abstract: A new porous membrane is composed of a phenylene -sulphide copolymer represented by general formula (-Ph-S-) m(Ph-X-)n (I), where pH is a phenylene group; X is -SO2 or -CO-; m , n = a natural number, m + n = 80-400. The porous membrane has a nonuniform structure in which one or more dense layers, formed on one or both sides of the membrane, provide the separation function. The porous layer has a larger void volume than the dense layer and is formed in contact with the dense layer. The phenylene sulphide copolymer can be represented by general formula -(-Ph-S-Ph-X-)q- (II) where q = an integer between 80 and 400. X is preferably -SO2-. Ph is preferably p-phenylene group. The dense layers has a separation ability which can reject 10 wt. % polyethylene glycol from polyethylene glycols having a molecular weight of 100,000. The thickness of the porous membrane is 10-100 microns. The void volume of the whole membrane is 20-80 %. The permeability of the membrane to pure water, under a pressure of 1kg/cm2 at 25 C, is 0.1 m3/m2. The porous membrane is laminated on a woven or nonwoven fabric made of polyester, polyamide, polyethylene, polypropylene or polyphenylene sulphide.
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公开(公告)号：DE68916343D1
公开(公告)日：1994-07-28
申请号：DE68916343
申请日：1989-01-10
Applicant: TORAY INDUSTRIES
Inventor： UEMURA TADAHIRO , FUJIMAKI HIDEO , IKEDA TOSHIHIRO
Abstract: A process for producing a composite semipermeable membrane, which comprises coating a microporous support membrane with a polyamide formed by the interfacial polycondensation between a polyfunctional aromatic amine and a polyfunctional acyl halide. The polyfunctional aromatic amine component contains, as the comonomer component, 1 to 20 wt %, based on said aromatic amine, of at least one member selected from among alkyldiamine, 1,3,5-trihydroxybenzene and 1,3-dihydroxybenzene, and hence the resulting composite semipermeable membrane has markedly improved oxidation resistance while maintaining the excellent highly selective separative function and high permeability of a crosslinked polyamide type composite semipermeable membrane. This membrane can be suitably used for desalting of brine or seawater.
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公开(公告)号：AT107538T
公开(公告)日：1994-07-15
申请号：AT89901294
申请日：1989-01-10
Applicant: TORAY INDUSTRIES
Inventor： UEMURA TADAHIRO , FUJIMAKI HIDEO , IKEDA TOSHIHIRO
Abstract: A process for producing a composite semipermeable membrane, which comprises coating a microporous support membrane with a polyamide formed by the interfacial polycondensation between a polyfunctional aromatic amine and a polyfunctional acyl halide. The polyfunctional aromatic amine component contains, as the comonomer component, 1 to 20 wt %, based on said aromatic amine, of at least one member selected from among alkyldiamine, 1,3,5-trihydroxybenzene and 1,3-dihydroxybenzene, and hence the resulting composite semipermeable membrane has markedly improved oxidation resistance while maintaining the excellent highly selective separative function and high permeability of a crosslinked polyamide type composite semipermeable membrane. This membrane can be suitably used for desalting of brine or seawater.
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公开(公告)号：CA2046852A1
公开(公告)日：1992-01-14
申请号：CA2046852
申请日：1991-07-11
Applicant: TORAY INDUSTRIES , KIRIN BREWERY
Inventor： YAMADA SHINICHI , SAKUMA ISAMU , HIMESHIMA YOSHIO , AOKI TAKAO , UEMURA TADAHIRO , SHIRAKURA AKIRA
Abstract: An oxygen scavenger comprises an oxygen absorbent composition and an oxygen permeable film covering the oxygen absorbent composition and including an asymmetric porous membrane whose outer surface portion in the thickness direction of the asymmetric porous membrane is formed as a dense skin layer. Since the dense skin layer is very thin, the oxygen permeability to the oxygen absorbent composition through the oxygen permeable film can be maintained sufficiently high. At the same time, since the dense skin layer has a sufficiently high barrier property as well as a high oxygen permeability, contact of the substances stored in a container with the oxygen absorbent composition can be surely prevented. The substances stored in the container attached with the oxygen scavenger can be prevented from deterioration due to the oxygen present in the container by a high oxygen absorption ability of the scavenger, and maintained in a good or fresh condition for a long term.
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Patent Agency Ranking
公开(公告)号：DE3682144D1
公开(公告)日：1991-11-28
申请号：DE3682144
申请日：1986-08-01
Applicant: TORAY INDUSTRIES
Inventor： UEMURA TADAHIRO , HIMESHIMA YOSHIO , KURIHARA MASARU
Abstract: In a semipermeable composite membrane comprising a microporous substrate and an ultra-thin membrane with which the substrate is coated the ultra-thin membrane is composed of a cross-linked aromatic polyamide and the cross-linked aromatic polyamide contains a tri- or higher functional aryl residue having at least two -NH groups. The semipermeable composite membrane has a high solute rejection, high and stable water flux and durability, and is thereby applicable to various fields.
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公开(公告)号：DE3675869D1
公开(公告)日：1991-01-10
申请号：DE3675869
申请日：1986-09-16
Applicant: TORAY INDUSTRIES
Inventor： SASAKI TATSUO , FUJIMAKI HIDEO , UEMURA TADAHIRO , KURIHARA MASARU
Abstract: A semipermeable composite membrane comprising a microporous substrate and an ultra-thin membrane covering the substrate, wherein the ultra-thin membrane comprises a crosslinked piperazine polyamide as a main component and contain a constituent component represented by the following general formula [I]: … … wherein R stands for -H or -CH3 and n is an integer of from 0 to 3.
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公开(公告)号：FR2433357A1
公开(公告)日：1980-03-14
申请号：FR7824033
申请日：1978-08-17
Applicant: TORAY INDUSTRIES
Inventor： UEMURA TADAHIRO , KURIHARA MASARU
Abstract: The membrane consists of a cellulose derivative 0.2 piece/0.844 mm2 void coefficient and 3x10-10 g3/cm7.atm3 A3/B wher A is water permeating constant (g/cm2.sec. atm), and B is salt permeating constant (cm/sec.). The membrane is obtd. from a membrane producing solution of a cellulose derivative, organic solvent, and tetracarboxylic acid of formula R-(CO2H)4, where R is tetravalent aliphatic or alicyclic organic group of 2-10C. The cellulose derivative is cellulose acetate, cellulose acetate butyrate, methyl cellulose, or ethyl cellulose. The organic solvent is acetone, DMC, dioxane, DMSO acetic acid, diethylene glycol, diacetone alcohol, acetonitrile, or nitromethane. The acid is butane tetracarboxylic acid, ethylene tetracarboxylic acid, dicyclobutane, tetracarboxylic acid, cyclopentane tetracarboxylic acid or cyclopropane tetracarboxylic acid.
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公开(公告)号：DE2835890A1
公开(公告)日：1980-02-28
申请号：DE2835890
申请日：1978-08-16
Applicant: TORAY INDUSTRIES
Inventor： UEMURA TADAHIRO , KURIHARA MASARU
Abstract: The membrane consists of a cellulose derivative 0.2 piece/0.844 mm2 void coefficient and 3x10-10 g3/cm7.atm3 A3/B wher A is water permeating constant (g/cm2.sec. atm), and B is salt permeating constant (cm/sec.). The membrane is obtd. from a membrane producing solution of a cellulose derivative, organic solvent, and tetracarboxylic acid of formula R-(CO2H)4, where R is tetravalent aliphatic or alicyclic organic group of 2-10C. The cellulose derivative is cellulose acetate, cellulose acetate butyrate, methyl cellulose, or ethyl cellulose. The organic solvent is acetone, DMC, dioxane, DMSO acetic acid, diethylene glycol, diacetone alcohol, acetonitrile, or nitromethane. The acid is butane tetracarboxylic acid, ethylene tetracarboxylic acid, dicyclobutane, tetracarboxylic acid, cyclopentane tetracarboxylic acid or cyclopropane tetracarboxylic acid.
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公开(公告)号：EP0357781A4
公开(公告)日：1990-02-05
申请号：EP89901294
申请日：1989-01-10
Applicant: TORAY INDUSTRIES
Inventor： UEMURA TADAHIRO , FUJIMAKI HIDEO , IKEDA TOSHIHIRO
CPC classification number: B01D69/125
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