JPS553859A - Producing method of semipermeable membrane - Google Patents

Producing method of semipermeable membrane

Info

Publication number
JPS553859A
JPS553859A JP7719278A JP7719278A JPS553859A JP S553859 A JPS553859 A JP S553859A JP 7719278 A JP7719278 A JP 7719278A JP 7719278 A JP7719278 A JP 7719278A JP S553859 A JPS553859 A JP S553859A
Authority
JP
Japan
Prior art keywords
cellulose
solvent
water
semipermeable membrane
polar organic
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
JP7719278A
Other languages
Japanese (ja)
Inventor
Jun Kamo
Takemoto Kamata
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.)
Mitsubishi Rayon Co Ltd
Original Assignee
Mitsubishi Rayon Co 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 Mitsubishi Rayon Co Ltd filed Critical Mitsubishi Rayon Co Ltd
Priority to JP7719278A priority Critical patent/JPS553859A/en
Publication of JPS553859A publication Critical patent/JPS553859A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/06—Organic material
    • B01D71/08—Polysaccharides
    • B01D71/12—Cellulose derivatives
    • B01D71/14—Esters of organic acids
    • B01D71/16—Cellulose acetate

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

PURPOSE:To accomplish production of a semipermeable membrane with a high water permeability excellent in the fraction property by gelling a polar organic solvent solution of cellulose diacetic acid and cellulose triacetic acid in a water or a water soluble non-solvent. CONSTITUTION:Cellulose diacetic acid with an acetylation ratio of 37 to 41% cellulose triacetic acid with an acetylation ratio of more than 43% are mixed and dissolved in a polar organic solvent with a boiling point exceeding about 120 deg.C such as dimethyl formamide, dimethyl acetoamide, dimethyl sulfoxide and triethyl phosphate. The solution thus obtained is exuded or extruded through a slit or a cap to be gelled in a water or a soluble non-solvent such as lower alcohol or mixed non-solvent thereof.
JP7719278A 1978-06-26 1978-06-26 Producing method of semipermeable membrane Pending JPS553859A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7719278A JPS553859A (en) 1978-06-26 1978-06-26 Producing method of semipermeable membrane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7719278A JPS553859A (en) 1978-06-26 1978-06-26 Producing method of semipermeable membrane

Publications (1)

Publication Number Publication Date
JPS553859A true JPS553859A (en) 1980-01-11

Family

ID=13626944

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7719278A Pending JPS553859A (en) 1978-06-26 1978-06-26 Producing method of semipermeable membrane

Country Status (1)

Country Link
JP (1) JPS553859A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5524506A (en) * 1978-08-09 1980-02-21 Teijin Ltd Selectively permeable cellulose ester film and manufacture thereof
US4541972A (en) * 1983-12-14 1985-09-17 Exxon Research And Engineering Co. Preparation of cellulose acetate membrane and its use for polar solvent-oil separation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5524506A (en) * 1978-08-09 1980-02-21 Teijin Ltd Selectively permeable cellulose ester film and manufacture thereof
US4541972A (en) * 1983-12-14 1985-09-17 Exxon Research And Engineering Co. Preparation of cellulose acetate membrane and its use for polar solvent-oil separation

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