专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

101. 发明专利

JPH09225273A LAMINATED ASYMMETRIC MEMBRANE AND ITS PRODUCTION 失效
公开(公告)号：JPH09225273A
公开(公告)日：1997-09-02
申请号：JP3643696
申请日：1996-02-23
申请人： NITTO DENKO CORP
发明人： HACHISUGA HISAO , IKEDA KENICHI
IPC分类号： B01D69/12 , B01D71/64 , B01D71/70 , C08G73/10 , C08G77/04 , D06N3/18 , D06N7/00
摘要： PROBLEM TO BE SOLVED: To produce a low-cost membrane having superior separating performance and permeability by laminating at least two asymmetric membranes different from each other in molecular structure. SOLUTION: At least two asymmetric membranes different from each other in molecular structure are laminated to obtain the objective low-cost laminated asymmetric membrane having superior separating performance and permeability. At least one of the asymmetric membranes has a homogeneous skin layer of 5-1,000nm thickness. The skin layer as a surface layer and a porous layer under the skin layer are made of the same material and the skin layer has higher density than the porous layer having a sponge structure and/or a finger void structure. At least one of F atom or -CF3 group is contained in each of repeating molecular structural units constituting at least one of the asymmetric membranes and a thin film of an elastomer polymer is formed on the laminated asymmetric membrane if necessary.

102. 发明专利

JPH09122463A POLYSULFONE SEMIPERMEABLE MEMBRANE AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH09122463A
公开(公告)日：1997-05-13
申请号：JP30840495
申请日：1995-10-31
申请人： NITTO DENKO CORP
发明人： HACHISUGA HISAO , IKEDA KENICHI
IPC分类号： B01D61/36 , B01D39/16 , B01D39/20 , B01D71/68
摘要： PROBLEM TO BE SOLVED: To provide a gas separation membrane with high permeation flux capable of meeting its practical applications from in view of the cost by forming the cross section of a porous layer of the same material as that of a homogeneous skin layer and thicker than the homogenous skin layer, out of a structure of voids, each of which has an average pore diameter of not more than 3μm, as a polysulfone resin semipermeable membrane consisting of the homogenous skin layer with an average thickness of 5-1000μm structurally continuous to the porous layer. SOLUTION: The 82 pts.wt. of diethyleneglycol dimethylether is added to 18 pts. by wt. of polysulfone, and this mixture is dissolved and defoamed to make a preparation. This solution for making a membrane is cast in a thickness of 200μm over a polyester unwoven cloth as a support layer, using an application, under a 25 deg.C temperature atmosphere. In addition, this coated polyester unwoven cloth is soaked in a 25 deg.C water as a coagulation liquid for 5min, and further, in a 25 deg.C water for one hour. Next, the cloth is dried at 100 deg.C to obtain a semipermeable membrane consisting of a homogeneous skin layer part 1 and a porous layer 2. Finally, a crosslinking silicone resin solution is applied to the surface of the semipermeable membrane to form a protecting film as an optional procedure.

103. 发明专利

JPH08318140A METHOD FOR SELECTING POLYMER USED FOR SEPARATION-ACTIVE LAYER OF ACIDIC GAS SEPARATION MEMBRANE AND ACIDIC GAS SEPARATION MEMBRANE PROVIDED WITH SEPARATION-ACTIVE LAYER COMPRISING POLYMER SELECTED THEREBY 失效
公开(公告)号：JPH08318140A
公开(公告)日：1996-12-03
申请号：JP12799595
申请日：1995-05-26
申请人： NITTO DENKO CORP
发明人： SHIMAZU AKIRA , IKEDA KENICHI , HACHISUGA HISAO , NANZAKI YOSHIHIRO
IPC分类号： B01D69/02 , B01D71/64
摘要： PURPOSE: To provide a method for selecting a polymer used for a separation- active layer which has high separation ability and high permeability with respect to acidic gases such as carbon dioxide, and further, to provide an acidic gas separation membrane that is provided with the separation-active layer comprising a polymer selected by the method. CONSTITUTION: This method comprises: determining a stable state of a molecular model system in a separation-active layer, where a polymer and an acidic gas coexist and a stable state of another molecular model system in the layer, where the polymer and a non-acidic gas coexist by a method using molecular mechanics, respectively; and selecting the objective polymer that consists of a molecular structure in which the inertial radius of the polymer is within the range of 10 to 200Å and the absolute value of stabilized energy by the interaction between the polymer and the acidic gas is 4 to 80 times as much as that by the interaction between the polymer and the non-acidic gas.

104. 发明专利

JP2513460B2 失效
公开(公告)号：JP2513460B2
公开(公告)日：1996-07-03
申请号：JP23378785
申请日：1985-10-18
申请人： NITTO DENKO CORP
发明人： ITO HIROYOSHI , YAMAMOTO SHOICHI , IKEDA KENICHI , NAKANO TOMOKO
IPC分类号： B01D71/68 , B01D71/52

105. 发明专利

JPH0810595A COMPOSITE REVERSE OSMOSIS MEMBRANE 失效
公开(公告)号：JPH0810595A
公开(公告)日：1996-01-16
申请号：JP14771194
申请日：1994-06-29
申请人： NITTO DENKO CORP
发明人： HIROSE MASAHIKO , IKEDA KENICHI , MAEDA MASATOSHI
IPC分类号： B01D69/12 , B01D71/56 , B01D71/82
摘要： PURPOSE:To prepare a composite reverse osmosis membrane having high desalting performance together with high water permeability even in the case of operation under low operation pressure. CONSTITUTION:This composite reverse osmosis membrane is composed of a thin film and a fine porous supporting body for supporting the thin film, and the thin film has a structure consisting essentially of a cross-linked polyamide prepared by interfacially polymerizing (a) an amine component containing at least one kind of compound selected from a group of amine compounds substantially of monomers having at least two primary and/or secondary amino groups with (b) an acid halide component as a benzene hexacarboxylic acid halide or a mixture of a benzene carboxylic acid halide with an acid halide compound essentially of a monomer having at least two acid halide groups.

106. 发明专利

JPH07171363A COMPOSITE REVERSE OSMOSIS MEMBRANE 失效
公开(公告)号：JPH07171363A
公开(公告)日：1995-07-11
申请号：JP32170893
申请日：1993-12-21
申请人： NITTO DENKO CORP
发明人： HIROSE MASAHIKO , IKEDA KENICHI
IPC分类号： B01D71/56 , B01D71/82
摘要： PURPOSE:To obtain a composite reverse osmosis membrane which has a high salt blocking ratio and high water permeability even for mixed solutes by a method in which the precursor of a thin film composed of polyamide with a specified structure as a main component, after being formed on a support, is treated with a compound which can react with unreacted chlorosulfonyl groups in the precursor. CONSTITUTION:A composite membrane is composed of a thin membrane and a micro-porous support which supports the thin membrane. The thin membrane is obtained by a method in which the precursor of the thin membrane containing polyamide as a main component which is made from an amine component containing at least one kind of amine selected from the group consisting substantially of monomeric aime compounds having at least two primary and/or secondary amino groups and a halide component containing at least one kind of acid halide selected from the group consisting substantially of monomeric acid halide compounds having at least one chlorosulfonyl group is treated with an organic compound having an amino group or a hydroxyl group (e.g. alanine) which can react with unreacted chlorosulfonyl groups in the precursor.

107. 发明专利

JPH073057A PRODUCTION OF HYDROPHILIC FLUORORESIN FILM 失效
公开(公告)号：JPH073057A
公开(公告)日：1995-01-06
申请号：JP8043693
申请日：1993-04-07
申请人： NITTO DENKO CORP
发明人： URAIRI MASAKATSU , IKEDA KENICHI , NODA KEN , YANO SHUJI
IPC分类号： C08J7/00
摘要： PURPOSE:To obtain a hydrophilic fluororesin film having high hydrophilic nature, its excellent durability, improved chemical resistance, solvent resistance, heat resistance, etc., by irradiating a fluororesin film with ultraviolet light in the presence of a specific compound to replace fluorine atom with a hydrophilic group. CONSTITUTION:A fluororesin film is brought into contact or impregnated with a solution of a compound containing an atom with >=128kcal/mol bond energy to fluorine atom and a hydrophilic group, irradiated with ultraviolet light and the fluorine atom of the fluororesin film is partially replaced with a hydrophilic functional group to give a hydrophilic fluororesin film. The compound is preferably an aluminum compound, a baron compound or a lithium compound and an ultraviolet light source is preferably a low-pressure mercury-vapor lamp.

108. 发明专利

JPH06327950A FILTRATION MEMBRANE FOR LIQUID ITS PRODUCTION AND FILTER USED THEREFOR 失效
公开(公告)号：JPH06327950A
公开(公告)日：1994-11-29
申请号：JP12372293
申请日：1993-05-26
申请人： NITTO DENKO CORP
发明人： URAIRI MASAKATSU , IKEDA KENICHI
IPC分类号： B01D69/02 , B01D71/34 , B01D71/36
摘要： PURPOSE:To obtain a filtration membrane for liquid having high hydrophilic property and excelling in durability, chemical resistance, pressure resistance and heat resistance without necessitating air vent operation, and to obtain a filter using the membrane by intermingling a part which is continuously hydrophobic from the surface to the rear of a membrane and a part which is continuously hydrophilic from the surface to the rear of the membrane. CONSTITUTION:Narrow pores of a porous membrane are impregnated with a compound solution. During the impregnation, the membrane is shielded by using a shielding means which is preferably formed into a fixed pattern and irradiated with ultraviolet rays, so a part of F atoms of high molecular polymer porosity is replaced with hydrophilic radicals in an exposed part, and as a result, a filter membrane for liquid 1 having a hydrophilic part 2 and a hydrophobic part 3 is obtained. As an ultraviolet ray source, for example, a low voltage mercury lamp is used. The irradiation time is set in consideration of various factors, such as output, an irradiation distance, kinds and concentrations of compound water solutions and the form of a film, but it is normally about 20-30sec. The area ratio of the hydrophobic part 3 to the whole is preferably

109. 发明专利

JPH0617471B2 失效
公开(公告)号：JPH0617471B2
公开(公告)日：1994-03-09
申请号：JP21882185
申请日：1985-09-30
申请人： NITTO DENKO CORP
发明人： IKEDA KENICHI , ITO HIROYOSHI , YAMAMOTO SHOICHI
IPC分类号： C08G65/48 , B01D71/52 , B01D71/68 , B01D71/82

110. 发明专利

JPH0515750A DOUBLE LAYERED REVERSE OSMOSIS MEMBRANE AND PRODUCTION THEREOF 失效
公开(公告)号：JPH0515750A
公开(公告)日：1993-01-26
申请号：JP24464791
申请日：1991-08-28
申请人： NITTO DENKO CORP
发明人： YAMAGUCHI TOMOO , IKEDA KENICHI
IPC分类号： B01D61/02 , B01D69/12 , B01D71/82
摘要： PURPOSE:To produce a double layered reverse osmosis membrane having a high salt rejection rate and high transmission flux and enabling practical desalting under relatively low pressure. CONSTITUTION:An ultra-thin membrane composed of cross-linked polyamide consisting of a polyamine component having two or more amino groups in its molecule and an acid component containing a linear aliphatic polyacid halide having two or more halogenated carbonyl group in its molecule as a main constitutional unit is formed on a microporous support membrane.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式