JPS6354905A - Production of semiosmosis composite membrane - Google Patents

Production of semiosmosis composite membrane

Info

Publication number
JPS6354905A
JPS6354905A JP19729186A JP19729186A JPS6354905A JP S6354905 A JPS6354905 A JP S6354905A JP 19729186 A JP19729186 A JP 19729186A JP 19729186 A JP19729186 A JP 19729186A JP S6354905 A JPS6354905 A JP S6354905A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
chlorine
membrane
soln
contg
aq
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP19729186A
Other versions
JPH051051B2 (en )
Inventor
Tetsuo Inoue
Masaru Kurihara
Tadahiro Uemura
Original Assignee
Toray Ind Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D69/00Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/12Composite membranes; Ultra-thin membranes
    • B01D69/125In-situ manufacturing by polymerisation, polycondensation, cross-linking, and/or reaction

Abstract

PURPOSE:To obtain a reverse-osmosis membrane with improved performance, especially water permeability, of the title composite membrane by bringing an ultrathin membrane consisting of cross-linked aromatic polyamide obtained by an interface reaction into contact with an aq. chlorine-contg. soln. at 6-13pH under ordinary pressure. CONSTITUTION:The ultrathin membrane is obtained by the interface reaction between an aromatic amine having >=2 reactive amino groups and a multifunctional aromatic acid halide. when the ultrathin membrane is dipped in the aq. chlorine-contg. soln. at 6.0-1.3pH, the performance, especially water permeability, of the obtained semipermeable composite membrane is improved. Gaseous chlorine, bleaching powder, sodium hypochlorite, chlorine dioxide, chloramine B, etc., are used as the chlorine generating reagent. The chlorine treatment must be carried out under ordinary pressure, and only the dipping of the membrane in the aq. chlorine-contg. soln. is required. The concn. of free chlorine is preferably controlled to 10-2,000ppm, and the treating time is adjusted to 2min-20hr.
JP19729186A 1986-08-25 1986-08-25 Expired - Fee Related JPH051051B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19729186A JPH051051B2 (en) 1986-08-25 1986-08-25

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19729186A JPH051051B2 (en) 1986-08-25 1986-08-25

Publications (2)

Publication Number Publication Date
JPS6354905A true true JPS6354905A (en) 1988-03-09
JPH051051B2 JPH051051B2 (en) 1993-01-07

Family

ID=16372020

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19729186A Expired - Fee Related JPH051051B2 (en) 1986-08-25 1986-08-25

Country Status (1)

Country Link
JP (1) JPH051051B2 (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0787525A1 (en) 1996-01-24 1997-08-06 Nitto Denko Corporation Highly permeable composite reverse osmosis membrane
WO1999022836A2 (en) * 1997-11-04 1999-05-14 The Dow Chemical Company Treatment of composite polyamide membranes with hypochlorite to improve performance
US5989426A (en) * 1995-07-05 1999-11-23 Nitto Denko Corp. Osmosis membrane
US6024873A (en) * 1996-03-21 2000-02-15 Nitto Denko Corporation Highly permeable composite reverse osmosis membrane and a reverse osmosis membrane module using the same
JP2000350928A (en) * 1999-06-10 2000-12-19 Toyobo Co Ltd Composite diaphragm, composite diaphragm module and its manufacture
JP2003010656A (en) * 2001-07-02 2003-01-14 Japan Organo Co Ltd Separation membrane, method for modifying the same, and apparatus and method for membrane separation
JP2008218679A (en) * 2007-03-05 2008-09-18 Kandenko Co Ltd Cooling water supply method and apparatus for high-capacity transformer
JP2009006315A (en) * 2007-05-30 2009-01-15 Toray Ind Inc Method for producing composite semipermeable membrane
JP2009006314A (en) * 2007-05-31 2009-01-15 Toray Ind Inc Method for producing composite semipermeable membrane
WO2011078131A1 (en) 2009-12-22 2011-06-30 東レ株式会社 Semipermeable membrane and manufacturing method therefor
WO2013047398A1 (en) 2011-09-29 2013-04-04 東レ株式会社 Composite semipermeable membrane
WO2015046582A1 (en) 2013-09-30 2015-04-02 東レ株式会社 Composite semipermeable membrane and method for manufacturing same

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5989426A (en) * 1995-07-05 1999-11-23 Nitto Denko Corp. Osmosis membrane
EP0787525A1 (en) 1996-01-24 1997-08-06 Nitto Denko Corporation Highly permeable composite reverse osmosis membrane
US6171497B1 (en) 1996-01-24 2001-01-09 Nitto Denko Corporation Highly permeable composite reverse osmosis membrane
US6024873A (en) * 1996-03-21 2000-02-15 Nitto Denko Corporation Highly permeable composite reverse osmosis membrane and a reverse osmosis membrane module using the same
WO1999022836A2 (en) * 1997-11-04 1999-05-14 The Dow Chemical Company Treatment of composite polyamide membranes with hypochlorite to improve performance
WO1999022836A3 (en) * 1997-11-04 1999-10-28 Dow Chemical Co Treatment of composite polyamide membranes with hypochlorite to improve performance
JP2000350928A (en) * 1999-06-10 2000-12-19 Toyobo Co Ltd Composite diaphragm, composite diaphragm module and its manufacture
JP2003010656A (en) * 2001-07-02 2003-01-14 Japan Organo Co Ltd Separation membrane, method for modifying the same, and apparatus and method for membrane separation
JP2008218679A (en) * 2007-03-05 2008-09-18 Kandenko Co Ltd Cooling water supply method and apparatus for high-capacity transformer
JP2009006315A (en) * 2007-05-30 2009-01-15 Toray Ind Inc Method for producing composite semipermeable membrane
JP2009006314A (en) * 2007-05-31 2009-01-15 Toray Ind Inc Method for producing composite semipermeable membrane
WO2011078131A1 (en) 2009-12-22 2011-06-30 東レ株式会社 Semipermeable membrane and manufacturing method therefor
WO2013047398A1 (en) 2011-09-29 2013-04-04 東レ株式会社 Composite semipermeable membrane
WO2015046582A1 (en) 2013-09-30 2015-04-02 東レ株式会社 Composite semipermeable membrane and method for manufacturing same
KR20160063337A (en) 2013-09-30 2016-06-03 도레이 카부시키가이샤 Composite semipermeable membrane and method for manufacturing same

Also Published As

Publication number Publication date Type
JPH051051B2 (en) 1993-01-07 grant

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees