GB1391559A - Reverse osmosis membranes - Google Patents

Reverse osmosis membranes

Info

Publication number
GB1391559A
GB1391559A GB5966272A GB5966272A GB1391559A GB 1391559 A GB1391559 A GB 1391559A GB 5966272 A GB5966272 A GB 5966272A GB 5966272 A GB5966272 A GB 5966272A GB 1391559 A GB1391559 A GB 1391559A
Authority
GB
United Kingdom
Prior art keywords
water
poly
membrane
furazanamide
reverse osmosis
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
GB5966272A
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.)
Montedison SpA
Original Assignee
Montedison SpA
Montecatini Edison SpA
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 Montedison SpA, Montecatini Edison SpA filed Critical Montedison SpA
Publication of GB1391559A publication Critical patent/GB1391559A/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
    • B01D71/56—Polyamides, e.g. polyester-amides
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
    • C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
    • C08G69/26—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
    • C08G69/42—Polyamides containing atoms other than carbon, hydrogen, oxygen, and nitrogen

Abstract

1391559 Reverse osmosis membranes MONTECATINI EDISON SpA 1 Jan 1973 [30 Dec 1971] 59662/72 Heading B5B An isotropic reverse osmosis membrane of a polypiperazinamide having recurring units of the general formula is disclosed, where R is an organic substituent of the piperazine ring, x is from 1 to 8 and Y is an oxygen or sulphur atom. Preferably R is C 1 to C 4 alkyl, especially methyl or ethyl and x = 1 or 2. Specified polypiperazinamides include poly (2-methyl piperazin-thiofurazanamide), poly (2 - methylpiperazin - furazanamide), poly (trans - 2,5 - dimethylpiperazin - thio furazanamide), and poly (trans - 2,5 - dimethyl piperazin-furazanamide). A solution of the polypiperazinamide in an organic water soluble aprotic polar solvent is spread preferably at room temperature, on a smooth surface to form a film suitably of 0À002 to 0À2 cm. thickness, a membrane made therefrom by surface evaporation of the solvent, e.g. at 70‹ to 200‹ C., especially 80‹ to 180‹ C., for from 1 min. to 3 hours, especially 3 to 30 mins. and the membrane congulated by immersion in a coagulating bath, suitably water or an aqueous saline solution, e.g. of sodium or calcium chloride or magnesium sulphate, or alternatively mixtures of water with methanol, ethanol or isopropyl alcohol. The congulating liquid temperature is suitably 0‹ to 30‹ C. especially 0‹ to 5‹C. Specified solvents include dimethylformamide, dimethyl-acetamide, dimethyl sulphoxide, N- methylpyrrolidone and tetramethyl sulphone, which may also contain dissolved therein, water, and a salt soluble in water and in the organic solvent, e.g. lithium chloride, bromide and nitrate, calcium, zinc and magnesium chlorides and magnesium chlorate. The membrane may be subjected to a heat treatment before use by immersion in water at 60-100‹ C. for from 1 min. to 5 hours.
GB5966272A 1971-12-30 1973-01-01 Reverse osmosis membranes Expired GB1391559A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT33137/71A IT944578B (en) 1971-12-30 1971-12-30 POLYMER MEMBRANES FOR REVERSE OSMOSIS WITH HIGH FLOW OF WATER AND HIGH SALINE REJECTION AND METHOD OF PREPARATION OF SUCH MEMBRANES

Publications (1)

Publication Number Publication Date
GB1391559A true GB1391559A (en) 1975-04-23

Family

ID=11236670

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5966272A Expired GB1391559A (en) 1971-12-30 1973-01-01 Reverse osmosis membranes

Country Status (13)

Country Link
JP (1) JPS5611484B2 (en)
BE (1) BE793504A (en)
BR (1) BR7209266D0 (en)
CA (1) CA1018315A (en)
DE (1) DE2263774C2 (en)
EG (1) EG10806A (en)
ES (1) ES410178A1 (en)
FR (1) FR2166115B1 (en)
GB (1) GB1391559A (en)
IL (1) IL41210A (en)
IT (1) IT944578B (en)
NL (1) NL175884C (en)
ZA (1) ZA729171B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4828773A (en) * 1987-10-14 1989-05-09 Exxon Research And Engineering Company Highly aromatic anisotropic polyurea/urethane membranes and their use for the separation of aromatics from non-aromatics
US4837054A (en) * 1987-10-14 1989-06-06 Exxon Research And Engineering Company Thin film composite membrane prepared by deposition from a solution
US4861628A (en) * 1987-10-14 1989-08-29 Exxon Research And Engineering Company Thin film composite membrane prepared by suspension deposition
US4879044A (en) * 1987-10-14 1989-11-07 Exxon Research And Engineering Company Highly aromatic anisotropic polyurea/urethane membranes and their use for the separation of aromatics from non aromatics
US4921611A (en) * 1987-10-14 1990-05-01 Schucker Robert C Thin film composite membrane prepared by deposition from a solution
US5045354A (en) * 1989-12-19 1991-09-03 Exxon Research & Engineering Company Production of supported thin film membranes

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA74296B (en) * 1973-01-16 1974-11-27 Montedison Spa Reverse osmosis anisotropic membranes with great water flow and strong saline rejection,based on polypiperazine amides,and process for preparing such membranes
DE3220376A1 (en) * 1982-05-29 1983-12-01 Seitz-Filter-Werke Theo & Geo Seitz GmbH und Co, 6550 Bad Kreuznach MEMBRANE FILTER FOR MICROFILTRATION AND METHOD FOR THE PRODUCTION THEREOF
IT1153101B (en) * 1982-07-01 1987-01-14 Montedison Spa PROCEDURE FOR THE PREPARATION OF ANISOTROPIC FORMED BODIES BASED ON POLY-PIPERAZINAMIDES
IT1222627B (en) * 1987-09-09 1990-09-05 Separem Spa PROCEDURE FOR THE PREPARATION OF MEMBRANES FOR REVERSE OSMOSIS AND MEMBRANES OBTAINED BY THIS PROCEDURE

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3696031A (en) * 1969-07-08 1972-10-03 Consiglio Nazionale Ricerche Osmosis process
US3687842A (en) * 1969-07-08 1972-08-29 Consiglio Nazionale Ricerche Osmosis process

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4828773A (en) * 1987-10-14 1989-05-09 Exxon Research And Engineering Company Highly aromatic anisotropic polyurea/urethane membranes and their use for the separation of aromatics from non-aromatics
US4837054A (en) * 1987-10-14 1989-06-06 Exxon Research And Engineering Company Thin film composite membrane prepared by deposition from a solution
US4861628A (en) * 1987-10-14 1989-08-29 Exxon Research And Engineering Company Thin film composite membrane prepared by suspension deposition
US4879044A (en) * 1987-10-14 1989-11-07 Exxon Research And Engineering Company Highly aromatic anisotropic polyurea/urethane membranes and their use for the separation of aromatics from non aromatics
US4921611A (en) * 1987-10-14 1990-05-01 Schucker Robert C Thin film composite membrane prepared by deposition from a solution
US5045354A (en) * 1989-12-19 1991-09-03 Exxon Research & Engineering Company Production of supported thin film membranes

Also Published As

Publication number Publication date
NL175884C (en) 1985-01-16
IL41210A (en) 1976-08-31
JPS4880481A (en) 1973-10-27
DE2263774A1 (en) 1973-07-12
FR2166115B1 (en) 1976-04-23
DE2263774C2 (en) 1982-04-01
IL41210A0 (en) 1973-02-28
ES410178A1 (en) 1975-12-01
BR7209266D0 (en) 1973-09-25
EG10806A (en) 1976-09-30
NL175884B (en) 1984-08-16
NL7217668A (en) 1973-07-03
CA1018315A (en) 1977-10-04
ZA729171B (en) 1973-09-26
JPS5611484B2 (en) 1981-03-14
IT944578B (en) 1973-04-20
BE793504A (en) 1973-06-29
FR2166115A1 (en) 1973-08-10

Similar Documents

Publication Publication Date Title
GB1391559A (en) Reverse osmosis membranes
ES464027A1 (en) Electrolytic generation of halogen biocides
ES372085A1 (en) Semi-permeable membranes and their use
JPS5416378A (en) Polysulfone semipermeable membrane
FR2156858B1 (en)
FR2200785A5 (en) Sensitised sheet for press sensitive copying system - coated with finely divided mixture of aromatic carboxylic acid (salt) and polymer
SE7603555L (en) ELECTRONIC CELL WITH NON-WATER ELECTROLYTE
JPS5554004A (en) Selective permeable membrane and its manufacturing
GB2123812B (en) Fluorinated carboxylic acids and derivatives their production and their use to produce fluorinated acid fluorides
ES462762A1 (en) Ultrafiltration membranes based on heteroaromatic polymers
JPS577166B2 (en)
JPS5531474A (en) Selective permeable membrane
KR840006021A (en) Surface treatment method of aluminum or aluminum alloy
JP2513460B2 (en) Composite semipermeable membrane and manufacturing method thereof
GB1095206A (en) A method of preparing a reverse osmosis membrane
SE8302193L (en) N- (1-SUBSTITUTED-3-PYRROLIDINYL) -BENZAMIDES AND THIOBENSAMIDES
SE427288B (en) ELECTRIC LIGHT CELL OF TREKCAM TYPE FOR ELECTROLYCLE OF AN ALKAL METAL HALOGENID SOLUTION
JPS5849281B2 (en) Hand Umaku Oyobi Sonoseizouhou
JPS5535969A (en) Ethylene-vinyl alcohol copolymer membrane and its manufacture
JPS5249248A (en) Reverse osmotic treatment of water-soluble electro-deposition coating
SE7607989L (en) PROCEDURE FOR THE PRODUCTION OF AQUATIC ALCOHOLIC HYDROXIDE SOLUTION
JPS5712033A (en) Polymer composition for open-cell foam
JPS55137005A (en) Selectively permeable composite membrane and preparing the same
JPS5382670A (en) Preparation of semipermeable membrane
JPS5925036B2 (en) Fluorine resin cation exchange membrane for electrolysis

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years

Effective date: 19921230