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公开(公告)号：JPH01104386A
公开(公告)日：1989-04-21
申请号：JP26098287
申请日：1987-10-15
Applicant: TORAY INDUSTRIES
Inventor： UEMURA TADAHIRO , INOUE TETSUO , NAKAGAWA YUKIO
IPC: C02F1/44
Abstract: PURPOSE:To prepare purified water economically and reliably by injecting a given volume of ammoniacal nitrogen into a liquid to be treated containing 0.1-10ppm of free chlorine and then treating said liquid to be treated with a composite reverse osmosis membrane. CONSTITUTION:Ammoniacal nitrogen, 1-10 times of volume of free chlorine, is injected into a liquid to be treated containing 0.1-10ppm of free chlorine. Then, said liquid to be treated is treated with a composite reverse osmosis membrane to prepared permeating purified water and concentrated liquid. As for the liquid to be treated, usually river water, underground water or the like is used, and pH of the liquid to be treated is determined in consideration of hydrolysis properties of the membrane to be used, separation of scale and the like, and generally pH 4-10, preferably around 6-8. As a composite reverse osmosis membrane, a membrane having a polyamide group activated layer, particularly a crosslinking aromatic group polyamide activated layer is suitable.
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公开(公告)号：JPS62110705A
公开(公告)日：1987-05-21
申请号：JP24892585
申请日：1985-11-08
Applicant: TORAY INDUSTRIES
Inventor： NAKAGAWA YUKIO , KONISHI KENICHI , EDOGAWA KATSUYA
Abstract: PURPOSE:To sterilize a solution to be treated contg. H2S preventing a formation of H2S coming from a bacteria generated in said solution to be treated by using a quarternary ammonium salt as a fungicide in a seperation of the solution to be treated with is a deoxidation state by means of a reverse osmosis membrane. CONSTITUTION:The quarternary ammonium salt such as benzalkonium chloride, etc., is added to the solution to be treated continuously or intermittently in the separation of the solution to be treated which is in the deoxidation state and contains
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公开(公告)号：JPS5811005A
公开(公告)日：1983-01-21
申请号：JP10694081
申请日：1981-07-10
Applicant: TORAY INDUSTRIES
Inventor： NAKAGAWA YUKIO , YAMAMURA HIROYUKI , KURIHARA MASARU
Abstract: PURPOSE:To improve the selective separating ability of a membrane by bringing a semipermeable membrane consisting of a crosslinked polymer consisting essentially of furfuryl alcohol into contact with an aq. soln. of a water soluble amino compd. CONSTITUTION:The semipermeable membrane consisting of a furfuryl alcohol type polymer refers to a membrane prepd. by coating an aq. soln. contg. fulfuryl alcohol or a reacting component system consisting of said alcohol and trishydroxyethylisocyanurate, inositol and sorbitol and an acid catalyst such as sulfuric acid on porous backing and polymerizing these by heating. Such semipermeable membrane of which the performance is degraded upon long-term use is brought into contact for a short time with an aq. 1 ppm-1% soln. of water soluble amino compds. such as alkyl amino compds., arom. amino compds., and alicyclic amino compds. According to the above-mentioned method, solute permeability is improved from about 2/3 to 1/3 by the extremely simple operation.
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公开(公告)号：JPS57207503A
公开(公告)日：1982-12-20
申请号：JP9086081
申请日：1981-06-15
Applicant: TORAY INDUSTRIES
Inventor： NAKAGAWA YUKIO , FUJINO HISAO , INOUE TETSUO
Abstract: PURPOSE:To preserve a semipermeable composite membrane consisting of a porous backing membrane and a thin film of a polymer contg. furfuryl alcohol over a long period of time without degrading the performance of said membrane prior to use by placing said membrane in a disoxidative atmosphere. CONSTITUTION:A semipermeable composite membrane provided with a thin film consisting of a crosslinked polymer consisting essentially of furfuryl alcohol as a barrier layer on a porous backing membrane is tightly sealed together with a disoxidative reducing agent by a film or a vessel of oxygen gas barrier property, whereby it is preserved. Polysulfone or the like is used as said porous backing, and furfuryl alcohol or the like is polymerized on said film, whereby the thin film is formed. The preserving vessel is constituted of a film having at least .atom.24hr gaseous oxygen permeability and the inside of the vessel is a space of
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公开(公告)号：JPH0483520A
公开(公告)日：1992-03-17
申请号：JP19594890
申请日：1990-07-24
Applicant: TORAY INDUSTRIES
Inventor： OKAZAKI MOTOHIRO , MINAMIGUCHI NAOSHI , NAKAGAWA YUKIO
Abstract: PURPOSE:To prevent the detachment of minute particles from a support constituted of a fiber and to enhance the quality of ultra-pure water by using a synthetic fiber filament yarn knittor woven fabric reduced in dust generating properties as the support of a flat composite porous member. CONSTITUTION:As the support of a flat composite porous membrane consisting of a porous membrane and a support, a synthetic fiber filament yarn knittor woven fabric wherein friction charge voltage is 3KV or less and friction charge density is 7muc/m or less under a condition of 20 deg.C and 30% RH is used. Further, yarn wherein conductive multifilament yarn is mixed with non-conductive yarn in a specific ratio, yarn wherein antistatic multifilament yarn is mixed with non-conductive yarn in a specific ratio or yarn wherein conductive multifilament yarn is mixed with antistatic yarn in a specific ratio is used. When the composite porous membrane reduced in dust generating properties is used as a support membrane, the detachment of minute particles is prevented and the quality of ultra-pure water prepared using an ultrafiltration membrane is enhanced.
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Patent Agency Ranking
公开(公告)号：JPH02126990A
公开(公告)日：1990-05-15
申请号：JP4107989
申请日：1989-02-21
Applicant: TORAY INDUSTRIES
Inventor： NOYORI MASARU , YOSHIOKA TOSHIO , SUZUKI SHOROKU , NAKAGAWA YUKIO
Abstract: PURPOSE:To produce ultra pure water at a high rate with a compact device by treating the water treated by UV irradiating with an ion-exchange fiber. CONSTITUTION:In the production of ultra pure water to be used in the fields of electronic industries, pharmaceutical industries, etc., the water to be treated is firstly irradiated with UV to oxidize and decompose the contained org. impurities. The org. acids and carbon dioxide formed by the oxidative decomposition are then treated with the ion-exchange fiber consisting of a strongly basic anion-exchange fiber and/or a strongly acidic cation-exchange fiber. By this method, ultra pure water having >=18.2MOMEGA.cm (at 25 deg.C) electric resistivity and
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公开(公告)号：JPS6117521B2
公开(公告)日：1986-05-08
申请号：JP16283884
申请日：1984-08-03
Applicant: Toray Industries
Inventor： KURIHARA MASARU , NAKAGAWA YUKIO , OKADA KYOSHI
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公开(公告)号：JPS6075307A
公开(公告)日：1985-04-27
申请号：JP16283884
申请日：1984-08-03
Applicant: TORAY INDUSTRIES
Inventor： KURIHARA MASARU , NAKAGAWA YUKIO , OKADA KIYOSHI
Abstract: PURPOSE:To provide a titled membrane efficient for the reverse osmosis and ultrafiltration by cross-linking a polymer consisting essentially of a denatured polyether obtained by the reaction of polyether having a repeating unit shown by a specified general formula with a specified compd. CONSTITUTION:The polyether having a repeating unit shown by the formula I (X: Cl, Br, and I, i and j: molecular fraction, i+j=1, 0 =1) are also prepared. Then said polymer and >=1 kind of the compds. are coated on a metallic plate, for example, to react with each other, and the obtained polymer consisting essentially of denatured polyether is cross-linked to obtain the semipermeable membrane.
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公开(公告)号：JPH0494726A
公开(公告)日：1992-03-26
申请号：JP21249390
申请日：1990-08-09
Applicant: TORAY INDUSTRIES
Inventor： IKEDA TOSHIHIRO , NAKAGAWA YUKIO , UEMURA TADAHIRO , KURIHARA MASARU
Abstract: PURPOSE:To obtain a semipermeable dual membrane having high removing rate of low-concn. cation especially under alkali condition by using such a crosslinked polyamide having quaternary nitrogen atoms to constitute a super- thin film layer of a semipermeable dual membrane. CONSTITUTION:A super-thin film layer essentially comprising crosslinked polyamide substantially having separation property is applied on a fine porous supporting membrane substantially having no separation performance. In this process, the crosslinked polyamide is formed by interfacial condensation polymn. of polyfunctional amine and polyfunctional acid halide to constitute the skeleton and to have quaternary nitrogen atoms as side chains. The obtd. semipermeable dual membrane has high removing rate of cation, especially even under alkali condition or in a low concn. region., and thereby, it gives large generation of water.
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公开(公告)号：JPH0490832A
公开(公告)日：1992-03-24
申请号：JP20745190
申请日：1990-08-03
Applicant: TORAY INDUSTRIES
Inventor： MINAMIGUCHI NAOSHI , OKAZAKI MOTOHIRO , NAKAGAWA YUKIO , MURAKISHI HIDEO
Abstract: PURPOSE:To obtain a flat composite porous membrane which prevents fine particles from falling off its support body and makes feasible the production of a super pure water and highly pure gas by forming a porous membrane on both sides of a support body consisting of the inner fiber of a flat composite porous membrane. CONSTITUTION:A porous membrane is formed on both sides of a support body consisting of the inner fiber of a flat composite porous membrane to form a structure of at least three layers. The porous membrane consists of an org. polymer (e.g. polysulfone polymer) with pores having a size of at most 0.1mum in diameter formed therein. A separating active layer capable of reverse osmosis separation or decomposable active layer capable of gas separation is formed at least one side of the porous membrane. As a result, fine particles can be prevented from falling off the support body and the production of a super pure water and a highly pure gas becomes feasible.
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