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公开(公告)号：DE69122934T2
公开(公告)日：1997-04-03
申请号：DE69122934
申请日：1991-08-08
Applicant: TORAY INDUSTRIES
Inventor： IKEDA TOSHIHIRO , NAKAGAWA YUKIO , UEMURA TADAHIRO , KURIHARA MASARU
Abstract: A composite semipermeable membrane which has a high electrolytes rejection even when the concentration of the electrolytes in feed water is very low and even if the pH of feed water is not less than 8 is disclosed. The composite semipermeable membrane of the present invention comprises a microporous substrate and a cross-linked polyamide-based ultra-thin membrane laminated on the microporous substrate, the ultra-thin membrane having a covalently bonded quaternary nitrogen atom.
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公开(公告)号：DE69122934D1
公开(公告)日：1996-12-05
申请号：DE69122934
申请日：1991-08-08
Applicant: TORAY INDUSTRIES
Inventor： IKEDA TOSHIHIRO , NAKAGAWA YUKIO , UEMURA TADAHIRO , KURIHARA MASARU
Abstract: A composite semipermeable membrane which has a high electrolytes rejection even when the concentration of the electrolytes in feed water is very low and even if the pH of feed water is not less than 8 is disclosed. The composite semipermeable membrane of the present invention comprises a microporous substrate and a cross-linked polyamide-based ultra-thin membrane laminated on the microporous substrate, the ultra-thin membrane having a covalently bonded quaternary nitrogen atom.
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公开(公告)号：JPH02218421A
公开(公告)日：1990-08-31
申请号：JP4107889
申请日：1989-02-21
Applicant: TORAY INDUSTRIES
Inventor： MINAMIGUCHI NAOSHI , MURAKISHI HIDEO , NAKAGAWA YUKIO
Abstract: PURPOSE:To exhibit an excellent separation performance by using a net made of a mesh-type textile as a material for permeating liquid path of a liquid separation unit. CONSTITUTION:A liquid separation unit is fitted to a center tube 1 and has the first semi-permeable membrane 2 and a material 4b for permeating liquid path. Thickness (a) of a net is determined by a fineness (b) of monofilament and, therefore, it is possible to set up its thickness optionally by changing the thickness of monofilament. A minimum mesh size is restricted by a rigidity of fiber and the fineness (b) of the monofilament. As for a type of yarn, either multifilament or monofilament is usable. By using this construction, it is possible to improve a separation performance and durability of a spiral type liquid separation unit.
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公开(公告)号：JPS6216122B2
公开(公告)日：1987-04-10
申请号：JP10694081
申请日：1981-07-10
Applicant: TORAY INDUSTRIES
Inventor： NAKAGAWA YUKIO , YAMAMURA HIROYUKI , KURIHARA MASARU
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公开(公告)号：JPS6028521B2
公开(公告)日：1985-07-05
申请号：JP13414277
申请日：1977-11-10
Applicant: TORAY INDUSTRIES
Inventor： KURIHARA MASARU , NAKAGAWA YUKIO , OKADA KYOSHI
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Patent Agency Ranking
公开(公告)号：JPS5534111A
公开(公告)日：1980-03-10
申请号：JP10563178
申请日：1978-08-31
Applicant: TORAY INDUSTRIES
Inventor： KURIHARA MASARU , UEMURA TADAHIRO , NAKAGAWA YUKIO
Abstract: PURPOSE:To obtain a semipermeable membrane suitable for selective permeation and separation of components of liquid mixture, by cosslinking the polymer of which main component is polyepiaminohydrine. CONSTITUTION:A polymer of which main component is polyepiaminohydrine is crosslinked to obtain a semipermeable membrane. The polyepiaminohydrine said above should have a molecular weight of several hundred to several millions, preferably several thousands to tens of thousand, containing the unit of I in the polymer by at least about not less than 20%, preferably about not less than 50%. This may be obtained by aminating the polymer containing the compound in formula II obtained by homopolymerization of epihalohydrine or copolymerization with ethylene oxide, by at least about not less than 20%, preferably about not less than 50%.
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公开(公告)号：JPS5467573A
公开(公告)日：1979-05-31
申请号：JP13414277
申请日：1977-11-10
Applicant: TORAY INDUSTRIES
Inventor： KURIHARA MASARU , NAKAGAWA YUKIO , OKADA KIYOSHI
Abstract: PURPOSE:Semipermeable membrane for desalting sea water and brine is provided by reacting a modified polyether having a specific repetition unit with a particular polyfunctional material. CONSTITUTION:A moidified polyether having a specific repetition unit such as epichlorohydrin as illustrated by formula 1 is reacted, on porous supporting member, with one or more of polyfunctional material such as resorsinoal, diethanolamine as illustrared by formula 2, 3, 4 and 5. The product obtained is semipermeable membrane consisting essentially of a modified polyether such as resorsional modified polyether, crosslinked with polymer. This semipermeable membrane has an excellent resistivity to chlorine and is effectively used as membrane for back osmosis or ultrafiltration.
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公开(公告)号：JP2505631B2
公开(公告)日：1996-06-12
申请号：JP21249390
申请日：1990-08-09
Applicant: TORAY INDUSTRIES
Inventor： IKEDA TOSHIHIRO , NAKAGAWA YUKIO , UEMURA TADAHIRO , KURIHARA MASARU
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公开(公告)号：JPH02122886A
公开(公告)日：1990-05-10
申请号：JP27825988
申请日：1988-11-01
Applicant: TORAY INDUSTRIES , OMI TADAHIRO
Inventor： OKAZAKI MOTOHIRO , NAKAGAWA YUKIO , YOKOTA HARUO , NOYORI MASARU , OMI TADAHIRO
Abstract: PURPOSE:To exactly remove ionic substance, TOC, fine particles and dissoluble silica by raising the pressure of pure water produced in a pure water producing equipment with a high-pressure pump and thereafter treating this pure water by an ion exchanger and then treating the pure water with a reverse osmotic membrane. CONSTITUTION:Pure water produced in a pure water producing equipment 1 constituted of a water treating equipment and ion exchange resin, etc., is stored in a pure water tank 2 and thereafter supplied to a high-pressure pump 3. This pure water raised in pressure with the high-pressure pump 3 is treated by an ion exchanger 4 to remove ionic substance which is considered to have been eluted from the parts of the high-pressure pump 3. Then ultra pure water is obtained by removing TOC in pure water with a reverse osmotic membrane 5. Further fine particles, microorganisms and dissoluble silica can be removed at extremely low consn. by both of the ion exchanger 4 and the reverse osmotic membrane 5. This obtained ultra pure water can be widely utilized for the fields of electronic industry, medicines and analysis, etc.
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公开(公告)号：JPH01135506A
公开(公告)日：1989-05-29
申请号：JP29484687
申请日：1987-11-20
Applicant: TORAY INDUSTRIES
Inventor： NAKAGAWA YUKIO , HAGIWARA MIHO , OOTO KATSUFUMI
Abstract: PURPOSE:To reduce the deterioration of a membrane and permit microorganisms to be sterilized by adding a specific organo-chlorine compound into an untreated water. CONSTITUTION:As a sterilizer, there is used at least one member selected from chloramine T, dichloramine T, chloramine B, harazone, chlorodimethylhydantoin, N-chloroacetoanilide, N-dichloroacetoanilide, N-chloronitroacetoanilide and N-chloroacetotoluide. This sterilizer is added to an untreated water before it is passed through an element formed using a reverse osmosis membrane synthesized from polyamides, whereby the growth of microorganisms is suppressed and the fouling of microorganisms is reduced to permit a continuous sterilizing operation for many hours.
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