JPS577206A - Cellulose ester anisotropic membrane - Google Patents

Cellulose ester anisotropic membrane

Info

Publication number
JPS577206A
JPS577206A JP8022580A JP8022580A JPS577206A JP S577206 A JPS577206 A JP S577206A JP 8022580 A JP8022580 A JP 8022580A JP 8022580 A JP8022580 A JP 8022580A JP S577206 A JPS577206 A JP S577206A
Authority
JP
Japan
Prior art keywords
membrane
cellulose ester
polymer
porous layer
thickness
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
JP8022580A
Other languages
Japanese (ja)
Inventor
Kiyoshi Sugie
Kenko Yamada
Teizo Yamaji
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.)
Teijin Ltd
Original Assignee
Teijin 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 Teijin Ltd filed Critical Teijin Ltd
Priority to JP8022580A priority Critical patent/JPS577206A/en
Publication of JPS577206A publication Critical patent/JPS577206A/en
Pending legal-status Critical Current

Links

Landscapes

  • Separation Using Semi-Permeable Membranes (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Laminated Bodies (AREA)

Abstract

PURPOSE: To obtain a cellulose ester anisotropic membrane with excellent selectivity as well as permeability by esterifying a membrane comprising a cellulose derivative by an aliphatic monocarboxylic acid having a specific number of a carbon atom.
CONSTITUTION: The cellulose ester anisotropic membrane is one comprising a cellulose derivative esterified with a linear and/or a branched chain aliphatic monocarboxylic acid having 6W16 carbon atoms. For example, a solution prepared by dissolving a polymer in a mixed solvent consisting of a volatile good solvent for the polymer and a nonsolvent therefor is cast onto a support having a smooth surface and after a part or all of said volatile good solvent is volatilized, the formed membrane is immersed in a coagulating bath and, thereafter, dried to obtain said cellulose ester anisotrapic membrane. The resulting membrane consists of a dense porous layer with a thickness of 0.01W10μm and a coarse porous layer with a thickness of 50W300μm and has excellent gas permeability, selectivity and high mechanical strength.
COPYRIGHT: (C)1982,JPO&Japio
JP8022580A 1980-06-16 1980-06-16 Cellulose ester anisotropic membrane Pending JPS577206A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8022580A JPS577206A (en) 1980-06-16 1980-06-16 Cellulose ester anisotropic membrane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8022580A JPS577206A (en) 1980-06-16 1980-06-16 Cellulose ester anisotropic membrane

Publications (1)

Publication Number Publication Date
JPS577206A true JPS577206A (en) 1982-01-14

Family

ID=13712413

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8022580A Pending JPS577206A (en) 1980-06-16 1980-06-16 Cellulose ester anisotropic membrane

Country Status (1)

Country Link
JP (1) JPS577206A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59199247A (en) * 1983-04-28 1984-11-12 旭化成株式会社 Composite film of regenerated cellulose
JPS6125608A (en) * 1984-07-14 1986-02-04 Agency Of Ind Science & Technol Separating film for water-soluble organic material and separation of water-soluble organic material utilizing the membrane
US4999110A (en) * 1986-11-07 1991-03-12 Asahi Kasei Kogyo Kabushiki Kaisha Regenerated cellulose membrane and processes for preparation thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59199247A (en) * 1983-04-28 1984-11-12 旭化成株式会社 Composite film of regenerated cellulose
JPS6125608A (en) * 1984-07-14 1986-02-04 Agency Of Ind Science & Technol Separating film for water-soluble organic material and separation of water-soluble organic material utilizing the membrane
US4999110A (en) * 1986-11-07 1991-03-12 Asahi Kasei Kogyo Kabushiki Kaisha Regenerated cellulose membrane and processes for preparation thereof

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