ES422290A1 - Anisotropic reverse osmosis membranes - Google Patents

Anisotropic reverse osmosis membranes

Info

Publication number
ES422290A1
ES422290A1 ES422290A ES422290A ES422290A1 ES 422290 A1 ES422290 A1 ES 422290A1 ES 422290 A ES422290 A ES 422290A ES 422290 A ES422290 A ES 422290A ES 422290 A1 ES422290 A1 ES 422290A1
Authority
ES
Spain
Prior art keywords
stage
reverse osmosis
osmosis membranes
membrane
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
ES422290A
Other languages
Spanish (es)
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 ES422290A1 publication Critical patent/ES422290A1/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
    • C08G69/40—Polyamides containing oxygen in the form of ether groups
    • 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
    • C08G69/42—Polyamides containing atoms other than carbon, hydrogen, oxygen, and nitrogen

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)
  • Polyamides (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

Procedure for the preparation of anisotropic gel membranes based on polyperazinamides, for reverse osmosis of cuticle type, characterized in that it comprises in the order that is exposed the following steps: 1st stage: the preparation of a polyporazinamide solution, in an appropriate organic solvent, 2nd stage: spreading the solution on a flat plate, 3rd stage: partial evaporation of the solvent, 4th stage: coagulation of the membrane by immersion in water and, finally, 5th stage: the heat treatment of the membrane. (Machine-translation by Google Translate, not legally binding)
ES422290A 1973-01-16 1974-01-15 Anisotropic reverse osmosis membranes Expired ES422290A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT19247/73A IT978187B (en) 1973-01-16 1973-01-16 ANISOTROPIC MEMBRANES FOR REVERSE OSMOSIS WITH HIGH FLOW AND ELEVATE SALINE REJECTION BASED ON POLYPERAZINAMIDES AND RELATIVE PREPARATION PROCEDURES

Publications (1)

Publication Number Publication Date
ES422290A1 true ES422290A1 (en) 1976-04-01

Family

ID=11156091

Family Applications (1)

Application Number Title Priority Date Filing Date
ES422290A Expired ES422290A1 (en) 1973-01-16 1974-01-15 Anisotropic reverse osmosis membranes

Country Status (12)

Country Link
JP (1) JPS574361B2 (en)
AU (1) AU6450974A (en)
BE (1) BE809757A (en)
CA (1) CA1024711A (en)
DE (1) DE2401428C2 (en)
ES (1) ES422290A1 (en)
FR (1) FR2324335A1 (en)
GB (1) GB1402247A (en)
IL (1) IL44156A (en)
IT (1) IT978187B (en)
NL (1) NL176231C (en)
ZA (1) ZA74296B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2704600C3 (en) * 1977-02-04 1988-05-26 Hoechst Ag, 6230 Frankfurt Permselective, asymmetric hemofiltration membrane with heteroporous structure based on polyamide
JPS57174107A (en) * 1981-04-20 1982-10-26 Teijin Ltd Production of permselective membrane

Family Cites Families (4)

* 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
NL7009957A (en) * 1969-07-08 1971-01-12
US3664986A (en) * 1969-10-14 1972-05-23 Du Pont 1,2,5-thiadiazole polymers
BE793504A (en) * 1971-12-30 1973-06-29 Montedison Spa ANISOTROPIC RETROOSMOSIS MEMBRANES AND THEIR PREPARATION PROCESS

Also Published As

Publication number Publication date
BE809757A (en) 1974-07-15
JPS574361B2 (en) 1982-01-26
DE2401428A1 (en) 1974-07-18
AU6450974A (en) 1975-07-17
JPS49109271A (en) 1974-10-17
GB1402247A (en) 1975-08-06
DE2401428C2 (en) 1985-11-14
NL7400402A (en) 1974-07-18
NL176231B (en) 1984-10-16
FR2324335B1 (en) 1978-02-10
IL44156A (en) 1976-08-31
ZA74296B (en) 1974-11-27
IL44156A0 (en) 1974-05-16
IT978187B (en) 1974-09-20
FR2324335A1 (en) 1977-04-15
NL176231C (en) 1985-03-18
CA1024711A (en) 1978-01-24

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