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GB1422767A - Polypiperazinamides and reverse osmosis anisotropic membranes made therefrom - Google Patents

Polypiperazinamides and reverse osmosis anisotropic membranes made therefrom

Info

Publication number
GB1422767A
GB1422767A GB1994674A GB1994674A GB1422767A GB 1422767 A GB1422767 A GB 1422767A GB 1994674 A GB1994674 A GB 1994674A GB 1994674 A GB1994674 A GB 1994674A GB 1422767 A GB1422767 A GB 1422767A
Authority
GB
United Kingdom
Prior art keywords
units
water
solvent
solution
casting
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
GB1994674A
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
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 filed Critical Montedison SpA
Publication of GB1422767A publication Critical patent/GB1422767A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • C08G69/40—Polyamides containing oxygen in the form of ether groups

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
  • Polyamides (AREA)

Abstract

1422767 Polypiperazimide membranes MONTEDISON SpA 7 May 1974 [7 May 1973] 19946/74 Heading B5B [Also in Division C3] A reverse osmosis anisotropic membrane is east from a solution of a polypiperazinamide which has units (I) where x s 0-8, R is any substituent, and A is a dicarbonyl radical being, in some of all of the units (I), (II) where R<SP>1</SP> and R<SP>11</SP> are H, alkyl, or aryl, and X is O or S. x and R may differ in different units. Optional units A include The substituents R may be arranged in any steric position in the piperazine ring, so that the substituted piperazine groups can be arranged cis- or trans-. The membrane is formed from the solution by (a) casting, (b) partially evaporating the solvent, and (c) coagulating by immersion in water, and optionally heat-treating. The solvent may be an alkyl amide, sulphoxide, or sulphone. Also present may be LiCl, LiNO 3 , LiBr, CaCl 2 , ZnCl 2 , MgCl, or MgClO 4 , or water. Before casting, the solution may be heated to from 70‹ C. to the b.p. of the solvent. The evaporation may be performed at 70-200‹ C., the coagulation at 0-30‹ C., and the heat-treatment in water at 60-100‹ C. The casting support may be flat or tubular and may be of glass, metal, polyethylene terephthalate, PTFE, woven or non-woven fabric, or paper; it may be porous. The coagulation bath water may contain NaCl, CaCl 2 , alcohols, or acetone. The membranes may be flat, tubular, or in the form of hollow fibres.
GB1994674A 1973-05-07 1974-05-07 Polypiperazinamides and reverse osmosis anisotropic membranes made therefrom Expired GB1422767A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT23770/73A IT987156B (en) 1973-05-07 1973-05-07 POLYPERAZINAMIDES COPOLIPERAZI NAMIDES AND MEMBRANES FOR OSMOSIS IN VERSA BASED ON SUCH POLYMERIC MATERIALS

Publications (1)

Publication Number Publication Date
GB1422767A true GB1422767A (en) 1976-01-28

Family

ID=11209824

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1994674A Expired GB1422767A (en) 1973-05-07 1974-05-07 Polypiperazinamides and reverse osmosis anisotropic membranes made therefrom

Country Status (11)

Country Link
JP (1) JPS575565B2 (en)
BE (1) BE814603A (en)
CA (1) CA1029496A (en)
DE (1) DE2421353A1 (en)
DK (1) DK157978C (en)
ES (1) ES426000A1 (en)
FR (1) FR2228805B1 (en)
GB (1) GB1422767A (en)
IL (1) IL44761A (en)
IT (1) IT987156B (en)
NL (1) NL176176C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0089846A1 (en) * 1982-03-23 1983-09-28 Kuraray Co., Ltd. Copolyesteramide and its production

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1040274B (en) * 1975-07-30 1979-12-20 Consiglio Nazionale Ricerche PROCEDURE FOR PREPARATION OF ANISOTROPIC MEMBRANES SUPPORTED FOR REVERSE OSMOSIS BASED ON SYNTHETIC POLYAMIDES

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0089846A1 (en) * 1982-03-23 1983-09-28 Kuraray Co., Ltd. Copolyesteramide and its production

Also Published As

Publication number Publication date
ES426000A1 (en) 1976-11-01
NL176176C (en) 1985-03-01
NL7405900A (en) 1974-11-11
FR2228805A1 (en) 1974-12-06
IL44761A0 (en) 1974-07-31
IL44761A (en) 1977-10-31
FR2228805B1 (en) 1976-12-17
JPS5081978A (en) 1975-07-03
DK157978B (en) 1990-03-12
NL176176B (en) 1984-10-01
JPS575565B2 (en) 1982-01-30
CA1029496A (en) 1978-04-11
DK157978C (en) 1990-08-27
DE2421353A1 (en) 1974-11-21
IT987156B (en) 1975-02-20
BE814603A (en) 1974-11-06

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Legal Events

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

Effective date: 19940506