GB1430323A - Process for the preparation of asymmetric reverse osmosis membranes - Google Patents

Process for the preparation of asymmetric reverse osmosis membranes

Info

Publication number
GB1430323A
GB1430323A GB1226174A GB1226174A GB1430323A GB 1430323 A GB1430323 A GB 1430323A GB 1226174 A GB1226174 A GB 1226174A GB 1226174 A GB1226174 A GB 1226174A GB 1430323 A GB1430323 A GB 1430323A
Authority
GB
United Kingdom
Prior art keywords
reverse osmosis
pore
solvent
osmosis membranes
preparation
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
GB1226174A
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.)
Chemical Systems Inc
Chem Systems Inc
Original Assignee
Chemical Systems Inc
Chem Systems 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
Application filed by Chemical Systems Inc, Chem Systems Inc filed Critical Chemical Systems Inc
Priority to GB1226174A priority Critical patent/GB1430323A/en
Publication of GB1430323A publication Critical patent/GB1430323A/en
Expired 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
    • B01D67/0002—Organic membrane manufacture
    • B01D67/0009—Organic membrane manufacture by phase separation, sol-gel transition, evaporation or solvent quenching
    • B01D67/00091—Organic membrane manufacture by phase separation, sol-gel transition, evaporation or solvent quenching by evaporation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
    • B01D67/0002—Organic membrane manufacture
    • B01D67/0023—Organic membrane manufacture by inducing porosity into non porous precursor membranes
    • B01D67/003—Organic membrane manufacture by inducing porosity into non porous precursor membranes by selective elimination of components, e.g. by leaching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/20—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/025—Reverse osmosis; Hyperfiltration

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Dispersion Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

1430323 Reverse osmosis membranes CHEMICAL SYSTEMS Inc 20 March 1974 12261/74 Heading B5B A reverse osmosis membrane is prepared by casting a solution of a cellulose ester, additionally containing at least one volatile pore-forming material, and allowing both the solvent and the pre-forming material to evaporate completely. The pore-forming materials are non-solvents for the cellulose derivative and have boiling points at least 30‹ C. higher than the solvent. The solution must contain no more than 15% by weight of the cellulosic material. In examples the membrane is formed by cellulose acetate, the solvent methylene chloride and the pore-forming materials ethanol and t-butanol.
GB1226174A 1974-03-20 1974-03-20 Process for the preparation of asymmetric reverse osmosis membranes Expired GB1430323A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1226174A GB1430323A (en) 1974-03-20 1974-03-20 Process for the preparation of asymmetric reverse osmosis membranes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1226174A GB1430323A (en) 1974-03-20 1974-03-20 Process for the preparation of asymmetric reverse osmosis membranes

Publications (1)

Publication Number Publication Date
GB1430323A true GB1430323A (en) 1976-03-31

Family

ID=10001322

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1226174A Expired GB1430323A (en) 1974-03-20 1974-03-20 Process for the preparation of asymmetric reverse osmosis membranes

Country Status (1)

Country Link
GB (1) GB1430323A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2409077A1 (en) * 1977-11-18 1979-06-15 Johns Manville MICROPOROUS FLEXIBLE CELLULOSIC MEMBRANES, THEIR PRODUCTION PROCESS AND THEIR APPLICATIONS
EP0042766A2 (en) * 1980-06-25 1981-12-30 Puropore, Inc. Highly anisotropic membranes and process for making same
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
US4678555A (en) * 1983-12-14 1987-07-07 Exxon Research And Engineering Company Preparation of cellulose acetate membrane and its use for polar solvent-oil separation
US8123945B2 (en) 2007-05-09 2012-02-28 The United States of America as represented by the Secretary of the Interior, The Bereau of Reclamation Method for making high flux, high salt rejection cellulose desalting membranes

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2409077A1 (en) * 1977-11-18 1979-06-15 Johns Manville MICROPOROUS FLEXIBLE CELLULOSIC MEMBRANES, THEIR PRODUCTION PROCESS AND THEIR APPLICATIONS
EP0042766A2 (en) * 1980-06-25 1981-12-30 Puropore, Inc. Highly anisotropic membranes and process for making same
EP0042766A3 (en) * 1980-06-25 1982-05-26 Puropore, Inc. Highly anisotropic membranes and process for making same
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
US4678555A (en) * 1983-12-14 1987-07-07 Exxon Research And Engineering Company Preparation of cellulose acetate membrane and its use for polar solvent-oil separation
US8123945B2 (en) 2007-05-09 2012-02-28 The United States of America as represented by the Secretary of the Interior, The Bereau of Reclamation Method for making high flux, high salt rejection cellulose desalting membranes

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee