GB1152596A – Improvements in Reverse Osmosis and Membrane Manufacture.
– Google Patents
GB1152596A – Improvements in Reverse Osmosis and Membrane Manufacture.
– Google Patents
Improvements in Reverse Osmosis and Membrane Manufacture.
Info
Publication number
GB1152596A
GB1152596A
GB2444/67A
GB244467A
GB1152596A
GB 1152596 A
GB1152596 A
GB 1152596A
GB 2444/67 A
GB2444/67 A
GB 2444/67A
GB 244467 A
GB244467 A
GB 244467A
GB 1152596 A
GB1152596 A
GB 1152596A
Authority
GB
United Kingdom
Prior art keywords
cellulose acetate
casting
membrane
solution
forming
Prior art date
1966-01-17
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
GB2444/67A
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.)
Aerojet Rocketdyne Inc
Original Assignee
Aerojet General 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.)
1966-01-17
Filing date
1967-01-17
Publication date
1969-05-21
1967-01-17
Application filed by Aerojet General Corp
filed
Critical
Aerojet General Corp
1969-05-21
Publication of GB1152596A
publication
Critical
patent/GB1152596A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
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
B01D67/0011—Casting solutions therefor
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
B01D67/0081—After-treatment of organic or inorganic membranes
B01D67/0083—Thermal after-treatment
B—PERFORMING OPERATIONS; TRANSPORTING
B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
B01D—SEPARATION
B01D2323/00—Details relating to membrane preparation
B01D2323/15—Use of additives
B01D2323/16—Swelling agents
Abstract
1,152,596. Cellulose acetate membranes. AEROJET-GENERAL CORP. 17 Jan., 1967 [17 Jan., 1966], No. 2444/67. Heading B5B. In a process for separating water from an aqueous solution, forming a cellulose acetate membrane by forming a casting solution comprising, cellulose acetate, an organic polar solvent, and a water soluble organic swelling agent capable of forming hydrogen bonds with the ketone and hydroxyl groups of the cellulose acetate, the swelling agent being present in the casting solution in from 1 to 10 parts by weight for each 10 parts of cellulose acetate, evaporating and casting said solution to form a membrane. A wide range of swelling agents may be used providing the swelling agent does not contain groups such as isocyanate acid halide or sulphonyl halide, which react chemically with the hydroxyl and ketone groups of the cellulose acetate. The swelling agents include organic mono- and poly-basic acids, amines, amides, carbamates, phosphates, phosphonic acids, mono-, di-, or tri-hydric alcohols, sulphonic acids and hydroxylamines. After casting a portion of the organic solvent is evaporated, the cast membrane is immersed in cold water, and is then set by heating in a warm water bath.
GB2444/67A
1966-01-17
1967-01-17
Improvements in Reverse Osmosis and Membrane Manufacture.
Expired
GB1152596A
(en)
Applications Claiming Priority (2)
Application Number
Priority Date
Filing Date
Title
US52103466A
1966-01-17
1966-01-17
US84749669A
1969-07-14
1969-07-14
Publications (1)
Publication Number
Publication Date
GB1152596A
true
GB1152596A
(en)
1969-05-21
Family
ID=27060353
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB2444/67A
Expired
GB1152596A
(en)
1966-01-17
1967-01-17
Improvements in Reverse Osmosis and Membrane Manufacture.
Country Status (8)
Country
Link
US
(1)
US3673084A
(en)
BE
(1)
BE692462A
(en)
DE
(1)
DE1720050B2
(en)
ES
(1)
ES335628A1
(en)
FR
(1)
FR1507885A
(en)
GB
(1)
GB1152596A
(en)
IL
(1)
IL27218A
(en)
NL
(1)
NL156167B
(en)
Families Citing this family (16)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
FR2138333B1
(en)
*
1971-05-24
1974-03-08
Rhone Poulenc Sa
US3789993A
(en)
*
1972-01-06
1974-02-05
Eastman Kodak Co
Cellulosic reverse osmosis membranes having high flux and high salt rejection
US3846404A
(en)
*
1973-05-23
1974-11-05
Moleculon Res Corp
Process of preparing gelled cellulose triacetate products and the products produced thereby
DE2336218C3
(en)
*
1973-07-17
1985-11-14
Byk Gulden Lomberg Chemische Fabrik Gmbh, 7750 Konstanz
Oral dosage form
DE2450670A1
(en)
*
1974-10-25
1976-04-29
Benckiser Gmbh Joh A
PROCESS FOR SEPARATION OF CITRATE OR CITRIC ACID FROM FERMENTATION SOLUTIONS
JPS5562214A
(en)
*
1978-11-02
1980-05-10
Toyobo Co Ltd
Production of hollow fiber membrane
US4239545A
(en)
*
1978-08-10
1980-12-16
Toray Industries, Inc.
Cellulose derivative reverse osmosis membrane and casting solution and additive for preparing the same
FR2433357A1
(en)
*
1978-08-17
1980-03-14
Toray Industries
Reverse osmosis membrane comprising cellulose deriv. – obtd. from soln. contg. e.g. cellulose acetate (butyrate) methyl or ethyl cellulose, organic solvent and tetra-carboxylic acid
JPS5584503A
(en)
*
1978-12-19
1980-06-25
Teijin Ltd
Preparing cellulose ester based selective permeable membrane
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
JPS60168044A
(en)
*
1984-02-10
1985-08-31
Sharp Corp
Moisture sensitive material
JPS60188835A
(en)
*
1984-03-08
1985-09-26
Sharp Corp
Moisture sensitive material
US4889561A
(en)
*
1985-02-04
1989-12-26
Sharp Kabushiki Kaisha
Moisture sensitive material
US4643856A
(en)
*
1985-03-21
1987-02-17
Moleculon, Inc.
Process of making gelled cellulose triacetate product
US7122660B1
(en)
*
1998-03-17
2006-10-17
Daicel Chemical Industries, Ltd.
Cellulose acetate and dope containing the same
Family Cites Families (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB787899A
(en)
*
1954-04-28
1957-12-18
British Celanese
Improvements in the manufacture of cellulose ester filamentary materials
US3038814A
(en)
*
1959-06-09
1962-06-12
Celanese Corp
Cellulose ester solutions
DE1194260B
(en)
*
1960-08-20
1965-06-03
Kalle Ag
Varnish for post-treatment of developed planographic printing forms
US3310488A
(en)
*
1964-03-05
1967-03-21
Univ California
Method of desalinizing water
1967
1967-01-04
IL
IL27218A
patent/IL27218A/en
unknown
1967-01-11
BE
BE692462D
patent/BE692462A/xx
unknown
1967-01-13
NL
NL6700570.A
patent/NL156167B/en
not_active
IP Right Cessation
1967-01-13
FR
FR91002A
patent/FR1507885A/en
not_active
Expired
1967-01-13
ES
ES335628A
patent/ES335628A1/en
not_active
Expired
1967-01-17
DE
DE1967A0054638
patent/DE1720050B2/en
active
Granted
1967-01-17
GB
GB2444/67A
patent/GB1152596A/en
not_active
Expired
1969
1969-07-14
US
US847496A
patent/US3673084A/en
not_active
Expired – Lifetime
Also Published As
Publication number
Publication date
BE692462A
(en)
1967-06-16
US3673084A
(en)
1972-06-27
IL27218A
(en)
1970-05-21
NL6700570A
(en)
1967-07-18
DE1720050A1
(en)
1971-05-19
DE1720050B2
(en)
1976-04-22
FR1507885A
(en)
1967-12-29
NL156167B
(en)
1978-03-15
ES335628A1
(en)
1969-10-16
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(en)
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Legal Events
Date
Code
Title
Description
1969-10-01
PS
Patent sealed [section 19, patents act 1949]
1976-05-19
PLE
Entries relating assignments, transmissions, licences in the register of patents
1983-02-09
PE
Patent expired
