FR2144102A5 - Microporous polyvinylidene fluoride membrane - for water purification - Google Patents

Microporous polyvinylidene fluoride membrane - for water purification

Info

Publication number
FR2144102A5
FR2144102A5 FR7123949A FR7123949A FR2144102A5 FR 2144102 A5 FR2144102 A5 FR 2144102A5 FR 7123949 A FR7123949 A FR 7123949A FR 7123949 A FR7123949 A FR 7123949A FR 2144102 A5 FR2144102 A5 FR 2144102A5
Authority
FR
France
Prior art keywords
polyvinylidene fluoride
water purification
fluoride membrane
membrane
microporous polyvinylidene
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.)
Expired
Application number
FR7123949A
Other languages
French (fr)
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.)
Polaroid Corp
Original Assignee
Polaroid Corp
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 Polaroid Corp filed Critical Polaroid Corp
Priority to FR7123949A priority Critical patent/FR2144102A5/en
Application granted granted Critical
Publication of FR2144102A5 publication Critical patent/FR2144102A5/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/28—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2201/00—Foams characterised by the foaming process
    • C08J2201/04—Foams characterised by the foaming process characterised by the elimination of a liquid or solid component, e.g. precipitation, leaching out, evaporation
    • C08J2201/054—Precipitating the polymer by adding a non-solvent or a different solvent
    • C08J2201/0542—Precipitating the polymer by adding a non-solvent or a different solvent from an organic solvent-based polymer composition
    • C08J2201/0543—Precipitating the polymer by adding a non-solvent or a different solvent from an organic solvent-based polymer composition the non-solvent being organic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2201/00—Foams characterised by the foaming process
    • C08J2201/04—Foams characterised by the foaming process characterised by the elimination of a liquid or solid component, e.g. precipitation, leaching out, evaporation
    • C08J2201/054—Precipitating the polymer by adding a non-solvent or a different solvent
    • C08J2201/0545—Precipitating the polymer by adding a non-solvent or a different solvent from an aqueous solvent-based polymer composition
    • C08J2201/0546—Precipitating the polymer by adding a non-solvent or a different solvent from an aqueous solvent-based polymer composition the non-solvent being organic

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

Microporous polyvinylidene fluoride membrane has pore volume of >=50% and the majority of the pores have dia. 0.5-2.0 m mu. The membrane is corrugated with >=3 corrugations/cm. Pref. used in membrane distillation method for water purification which requires less powder than reverse osmosis. Not wetted by brackish or salt water.
FR7123949A 1971-06-30 1971-06-30 Microporous polyvinylidene fluoride membrane - for water purification Expired FR2144102A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7123949A FR2144102A5 (en) 1971-06-30 1971-06-30 Microporous polyvinylidene fluoride membrane - for water purification

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7123949A FR2144102A5 (en) 1971-06-30 1971-06-30 Microporous polyvinylidene fluoride membrane - for water purification

Publications (1)

Publication Number Publication Date
FR2144102A5 true FR2144102A5 (en) 1973-02-09

Family

ID=9079619

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7123949A Expired FR2144102A5 (en) 1971-06-30 1971-06-30 Microporous polyvinylidene fluoride membrane - for water purification

Country Status (1)

Country Link
FR (1) FR2144102A5 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001038428A1 (en) * 1999-11-26 2001-05-31 The University Of Nottingham Microporous polymer matrices

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001038428A1 (en) * 1999-11-26 2001-05-31 The University Of Nottingham Microporous polymer matrices

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Legal Events

Date Code Title Description
ST Notification of lapse