JPS5458686A - Washing method for semipermeable membrane - Google Patents

Washing method for semipermeable membrane

Info

Publication number
JPS5458686A
JPS5458686A JP12544377A JP12544377A JPS5458686A JP S5458686 A JPS5458686 A JP S5458686A JP 12544377 A JP12544377 A JP 12544377A JP 12544377 A JP12544377 A JP 12544377A JP S5458686 A JPS5458686 A JP S5458686A
Authority
JP
Japan
Prior art keywords
semipermeable membrane
soln
washing
addn
membrane
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.)
Pending
Application number
JP12544377A
Other languages
Japanese (ja)
Inventor
Kikuo Nomura
Sachiro Yotsuya
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries Ltd
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
Application filed by Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Priority to JP12544377A priority Critical patent/JPS5458686A/en
Publication of JPS5458686A publication Critical patent/JPS5458686A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
    • B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/16—Use of chemical agents
    • B01D2321/162—Use of acids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/16—Use of chemical agents
    • B01D2321/168—Use of other chemical agents

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

PURPOSE:To recover permeability of a semipermeable membrane and to keep the permeability for a long time through washing for a short time under such mild condition that may not damage the membrane, the washing by semipermeable memberane with an aq. mixed soln. of neutral detergent and citric acid whose pH is adjusted in a specific range by addn. of alkali hydroxide. CONSTITUTION:Cellulose acetate semipermeable membrane contaminated through treatment of oil-contg. emulsified waste water, activated-sludge-treated water, or sugar manufacture waste soln. is waste soln. is washed by the following method: The contaminated semipermeable membrane is washed with an aq. mixed soln. of a neutral detergent and citric acid after its pH is adjusted in the range 2-6, pref. 3-6 by addn. of one or more of NH4OH, NaOH, KOH.
JP12544377A 1977-10-18 1977-10-18 Washing method for semipermeable membrane Pending JPS5458686A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12544377A JPS5458686A (en) 1977-10-18 1977-10-18 Washing method for semipermeable membrane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12544377A JPS5458686A (en) 1977-10-18 1977-10-18 Washing method for semipermeable membrane

Publications (1)

Publication Number Publication Date
JPS5458686A true JPS5458686A (en) 1979-05-11

Family

ID=14910203

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12544377A Pending JPS5458686A (en) 1977-10-18 1977-10-18 Washing method for semipermeable membrane

Country Status (1)

Country Link
JP (1) JPS5458686A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5753204A (en) * 1980-09-16 1982-03-30 Daicel Chem Ind Ltd Method for washing membrane module
JPS6249906A (en) * 1985-08-26 1987-03-04 Nisshin Steel Co Ltd Method for washing ultrafilter membrane
JPH03278820A (en) * 1990-03-28 1991-12-10 Miura Co Ltd Washing agent for reverse osmosis membrane
FR2708210A1 (en) * 1993-07-26 1995-02-03 Pall Corp Process for treating an obstructed porous medium

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS523230A (en) * 1975-06-27 1977-01-11 Sanyo Kokusaku Pulp Co Method of constructing plain folded plate roof for wooden house of panel construction

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS523230A (en) * 1975-06-27 1977-01-11 Sanyo Kokusaku Pulp Co Method of constructing plain folded plate roof for wooden house of panel construction

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5753204A (en) * 1980-09-16 1982-03-30 Daicel Chem Ind Ltd Method for washing membrane module
JPH0142726B2 (en) * 1980-09-16 1989-09-14 Daicel Chem
JPS6249906A (en) * 1985-08-26 1987-03-04 Nisshin Steel Co Ltd Method for washing ultrafilter membrane
JPH03278820A (en) * 1990-03-28 1991-12-10 Miura Co Ltd Washing agent for reverse osmosis membrane
FR2708210A1 (en) * 1993-07-26 1995-02-03 Pall Corp Process for treating an obstructed porous medium
NL9401228A (en) * 1993-07-26 1995-02-16 Pall Corp Method for treating a silted porous medium.

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