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11. 发明专利

JPH0679832A HYDROPHILIC FIBER SHEET AND PRODUCTION THEREOF 失效
公开(公告)号：JPH0679832A
公开(公告)日：1994-03-22
申请号：JP28873992
申请日：1992-10-27
申请人： NITTO DENKO CORP , HITACHI MAXELL
发明人： TACHIBANA TOSHIMITSU , URAIRI MASAKATSU , MATSUMOTO KENJI , YANO SHUJI , SHINOMURA TOSHIHIKO
IPC分类号： B01D69/10 , B01D39/08 , B32B27/02 , B32B27/16 , D06M10/00 , D06M10/02 , D06M101/00 , D06M101/16 , D06M101/18 , D06M101/20 , D06M101/22 , D06M101/32 , D06M101/34 , H01M2/16
摘要： PURPOSE:To provide sufficient hydrophilic properties by performing low temp. plasma treatment on a porous fiber sheet prepd. by using a hydrophobic fiber under a specified condition. CONSTITUTION:At least a part of the constitutional fiber of a non-woven fabric sheet, etc., is treated with low temp. plasma under a condition with a product of high frequency output treating density of 5-15MHz and treating time of 0.1-50W.sec/cm and a gas pressure of 0.01-10Torr to make it hydrophilic. A porous fiber sheet provided with a hydrophilic property wherein the water absorption rate is at least 10mm per 2min when one end of the sheet is immersed in the pure water under an atmosphere of the temp. of 25% and the humidity of 60% without changing characteristics such as structure and strength the sheet originally has, can be obtd, thereby.

12. 发明专利

JPH05146655A DUAL REVERSE OSMOSIS MEMBRANE 失效
公开(公告)号：JPH05146655A
公开(公告)日：1993-06-15
申请号：JP34229291
申请日：1991-11-29
申请人： NITTO DENKO CORP
发明人： HACHISUGA HISAO , SHIMIZU MITSURU , MATSUMOTO KENJI
IPC分类号： B01D71/56 , B01D71/82
摘要： PURPOSE:To provide a dual reverse osmosis membrane having high transmitting flux and high salt blocking ratio for selective separation of a component in a liquid mixture. CONSTITUTION:A thin film containing a cross-linked polymer as a main component is formed on a finely porous supporting membrane wherein the cross-linked polymer is composed of 1,2,3,4,5,6-cyclohexanehexacarboxylic acid halide and multifunctional amine.

13. 发明专利

JPH05146654A DUAL REVERSE OSMOSIS MEMBRANE 失效
公开(公告)号：JPH05146654A
公开(公告)日：1993-06-15
申请号：JP34229191
申请日：1991-11-29
申请人： NITTO DENKO CORP
发明人： HACHISUGA HISAO , SHIMIZU MITSURU , SHIMATANI SHUNICHI , HIROSE MASAHIKO , MATSUMOTO KENJI
IPC分类号： B01D71/56 , B01D71/82
摘要： PURPOSE:To provide a dual reverse osmosis membrane having high transmitting flux to separate a component in a liquid mixture selectively and high salt blocking ratio by forming a thin film on a finely porous supporting membrane wherein the film is of a cross-linked polyamide prepared by interfacial polymerization of an amine and a specified alicyclic multifunctional acid halide in the presence of an amine salt. CONSTITUTION:On a finely porous supporting membrane, an aqueous solution containing an amine compound which is essentially a monomer and has at least two amino groups and an aqueous solution containing an alicyclic multifunctional acid halide containing at least one component such as O, S, NR (R stands for H, alkyl groups) except carbon are interfacially polymerized in the presence of an amine salt to form a thin film of a cross-linked polyamide. As a result, both high desalting function and water transmitting function are provided and the resulting membrane can be used preferably for, for example, desalting of salt water, sea water, etc., by desalination and preparation of super pure water necessary for semiconductor manufacture.

14. 发明专利

JPH0576734A FILTRATION FILM FOR LIQUID AND FILTERING DEVICE USING THE SAME 失效
公开(公告)号：JPH0576734A
公开(公告)日：1993-03-30
申请号：JP27470591
申请日：1991-09-25
申请人： NITTO DENKO CORP
发明人： URAIRI MASAKATSU , MATSUMOTO KENJI
IPC分类号： B01D69/02 , B01D71/36
摘要： PURPOSE:To provide a filtration film for liquid, which is possible to use for precision filtration or ultrafiltration of liquid such as chemicals or water and free from deterioration of filtration rate, and a filtering device using the film. CONSTITUTION:The filtration film for liquid is made by forming a covering layer of a fluorine contained surface active agent having a structure expressed by a specific chemical formula at least on a narrow pores surface of a high molecular polymer porous film and has hydrophilic property.

15. 发明专利

JPH03267127A CONTAMINATION-RESISTANT MEMBRANE AND TREATMENT FOR OBTAINING THE SAME 失效
公开(公告)号：JPH03267127A
公开(公告)日：1991-11-28
申请号：JP6745790
申请日：1990-03-16
申请人： NITTO DENKO CORP
发明人： FUUSHIYANGU FUOODO BEBAHANI , MATSUMOTO KENJI , EZOE MINORU
IPC分类号： B01D65/08 , B01D67/00 , B01D69/02
摘要： PURPOSE:To allow a separation membrane to stably maintain a specified amt. of electric charge and to impart excellent contamination resistance to the membrane by impressing a DC voltage at >=10V on the membrane at >=20 deg.C to impart an electric charge amt. at >=0.01V to the membrane. CONSTITUTION:A needle electrode 2 is provided to expose the surface of a separation membrane 1 to a corona discharge by a DC voltage, the gap length is controlled to about 1-8mm, and a VDC of about -5000 to -8000 is impressed to treat the membrane. At this time, the membrane 1 is heated to about 20-300 deg.C, the voltage is impressed for about several minutes, the membrane is allowed to stand for several hours while the voltage is impressed, and the membrane 1 is cooled below room temp. Consequently, a contamination-resistant membrane having >=0.01V electric charge amt. is obtained. A micro-filter membrane, an ultrafilter membrane, etc., are used as the membrane 1, and polyamide, polyolefin, polyimide, polysulfone, etc., are used as the material for the membrane.

16. 发明专利

JPH0386210A TREATMENT OF GASEOUS MIXTURE CONTAINING ORGANIC SOLVENT 失效
公开(公告)号：JPH0386210A
公开(公告)日：1991-04-11
申请号：JP22426689
申请日：1989-08-29
申请人： NITTO DENKO CORP
发明人： MATSUMOTO KENJI , INOUE KENICHI , IWAMA AKIO
IPC分类号： B01D53/22
摘要： PURPOSE:To efficiently recover an org. solvent vapor from a gaseous mixture contg. the org. solvent by supplying the mixture to the permselective separation multistage membrane modules connected in series with specified operation and concentrating the vapor by permeation. CONSTITUTION:A gas (d) such as nitrogen contg. org. solvent and a gas(e) incapable of permeating through the second stage module and to be returned to the supply side are mixed, and the mixture is introduced into the primary side of the first stage module 1 by a blower 3. The solvent vapor concn. on the secondary side of the module 1 is increased by the permselective separation action of the membrane of the module 1, and the gas (f) incapable of permeating through the module 1 and lowered in solvent concn. is discharged into the atmosphere. The gas (g) permeated through the module 1 is introduced into the module 2 by a vacuum pump 4, the solvent vapor concn. in the gas (h) permeated through the module 2 is again increased, and the gas is transferred to a cooling and condensing machine 6 by a vacuum pump 5.

17. 发明专利

JPH0356114A METHOD FOR TREATING EXHAUST GAS OF ORGANIC SOLVENT STORAGE VESSEL 失效
公开(公告)号：JPH0356114A
公开(公告)日：1991-03-11
申请号：JP19324089
申请日：1989-07-25
申请人： NITTO DENKO CORP
发明人： INOUE KENICHI , MATSUMOTO KENJI
IPC分类号： B01D53/22 , B65D90/30
摘要： PURPOSE:To achieve prevention of pollution of the atmosphere and recovery of solvents with high efficiencies by separating an exhaust gas from an organic solvent storage vessel into a nonpermeative gas B of low solvent concentration and a permeative gas C of high solvent concentration by means of a permselective membrane to discharge the gas B and by returning the gas C to said storage vessel. CONSTITUTION:A gas mixed with organic solvent vapor in the upper space of an organic solvent storage vessel 1 is discharged through a discharge pipe 6 to adjust the internal pressure of the vessel 1. The gas thus discharged is separated into a nonpermeative gas B of low solvent concentration and a permeative gas C of high solvent concentration by means of a permselective membrane 8, whereby the gas B is exhausted through an exhaust pipe 9, while the gas C is returned to the vessel 1 through a return pipe 12. As a result, the concentration of the organic solvent in the gas to be vented to atmosphere can be reduced to as low as 0.005% or lower, thereby raising the recovery efficiency of solvent to as high as 99.9% or higher.

18. 发明专利

JPH02124702A OXYGEN ENRICHER 失效
公开(公告)号：JPH02124702A
公开(公告)日：1990-05-14
申请号：JP27817488
申请日：1988-11-02
申请人： NITTO DENKO CORP
发明人： MATSUMOTO KENJI , TOZAWA OSAMI , IWAMA AKIO
IPC分类号： B01D53/22 , C01B13/02
摘要： PURPOSE:To utilize the exhaust for cooling the enricher of the title equipment, to increase the supply of air to a membrane module and to raise the oxygen enriching capacity by providing a fan for exhausting the air impermeable to an oxygen permselective membrane. CONSTITUTION:The air A is supplied to the membrane module 2 by an air blower 1. the permselective membrane is preferably made of silicone, 4- methylpentene-1 polymer, etc., and a capillary type or hollow fiber-type module is preferably used. The oxygen-enriched air permeated through the membrane is discharged from the outlet 30 through a vacuum pump 3. The air impermeable to the membrane is discharged to the outside by the fan 4, and the vacuum pump 3 is cooled by a part of the air.

19. 发明专利

JPH0155645B2 失效
公开(公告)号：JPH0155645B2
公开(公告)日：1989-11-27
申请号：JP22624484
申请日：1984-10-26
申请人： NITTO DENKO CORP
发明人： YAMADA SHINJI , MATSUMOTO KENJI , SHIBATA YUKARI , SAKAI ISOJI
IPC分类号： C08F2/00 , C08F2/22 , C08F2/24 , C08F2/30 , C08F20/00 , C08F20/10 , C08F265/04 , C08F265/06 , C09J4/02 , C09J7/02

20. 发明专利

JPH01236918A METHOD FOR SEPARATION AND RECOVERY OF ORGANIC SOLVENT VAPOR 失效
公开(公告)号：JPH01236918A
公开(公告)日：1989-09-21
申请号：JP6425388
申请日：1988-03-16
申请人： NITTO DENKO CORP
发明人： TOZAWA OSAMI , SHIMAZU AKIRA , MATSUMOTO KENJI , IWAMA AKIO
IPC分类号： B01D53/22 , C07B31/00 , C07B63/00 , C07C1/00 , C07C7/144 , C07C17/00 , C07C17/38 , C07C17/389 , C07C19/01 , C07C19/04 , C07C19/041 , C07C19/05 , C07C21/10 , C07C67/00
摘要： PURPOSE:To separate and recover an organic solvent vapor from a gas containing this organic solvent vapor by using a selectively permeable composite film wherein an active thin film is formed by crosslinking a silicone resin upon a porous support film. CONSTITUTION:A silicone resin, which has a crosslinking function due to, e.g., various reactive groups at the end of its molecular chain, with a porous support film made of polyimide resin etc. By utilizing this selectively permeable composite film, a vapor of an organic solvent such as hydrocarbon, alcohol, carboxylic acid ester, etc. are separated and recovered from a gas wherein this organic solvent vapor is mixed with water, nitrogen, oxygen, etc. This method does not necessitate such a cyclic operation as by an ordinary adsorption method with active carbon, but enables a continuous operation, and is lower in costs of installation and operation as compared with an absorption method.

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