ZA824124B - Process for the alkaline saponification of pan - Google Patents

Process for the alkaline saponification of pan

Info

Publication number
ZA824124B
ZA824124B ZA824124A ZA824124A ZA824124B ZA 824124 B ZA824124 B ZA 824124B ZA 824124 A ZA824124 A ZA 824124A ZA 824124 A ZA824124 A ZA 824124A ZA 824124 B ZA824124 B ZA 824124B
Authority
ZA
South Africa
Prior art keywords
aqueous
copolymers
degrees
heated
pan
Prior art date
Application number
ZA824124A
Inventor
H Wille
F Engelhardt
Original Assignee
Cassella Ag
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 Cassella Ag filed Critical Cassella Ag
Publication of ZA824124B publication Critical patent/ZA824124B/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F8/00—Chemical modification by after-treatment
    • C08F8/12—Hydrolysis

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

1. Process for the preparation of homogeneous aqueous solutions of saponified or partially saponified acrylonitrile polymers and copolymers by treating aqueous dispersions of the polymers or copolymers, respectively, with aqueous alkalis at elevated temperature, characterised in that the dispersion is added with continuous stirring to an aqueous alkali metal hydroxide solution which has been heated to 70 to 85 degrees C, and, after the addition is complete, the mixture is heated to a temperature of over 91 to 110 degrees C, while stirring, until the calculated amount of ammonia has been split off.
ZA824124A 1981-06-12 1982-06-11 Process for the alkaline saponification of pan ZA824124B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19813123290 DE3123290A1 (en) 1981-06-12 1981-06-12 IMPROVED METHOD FOR ALKALINE SAPONIFICATION OF PAN

Publications (1)

Publication Number Publication Date
ZA824124B true ZA824124B (en) 1983-04-27

Family

ID=6134519

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA824124A ZA824124B (en) 1981-06-12 1982-06-11 Process for the alkaline saponification of pan

Country Status (7)

Country Link
EP (1) EP0067362B1 (en)
JP (1) JPS57212204A (en)
AT (1) ATE21398T1 (en)
BR (1) BR8203423A (en)
DE (2) DE3123290A1 (en)
ES (1) ES8305799A1 (en)
ZA (1) ZA824124B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3619721A1 (en) * 1986-06-12 1987-12-17 Wolff Walsrode Ag METHOD FOR THE PRODUCTION OF WATER-SOLUBLE COPOLYMERISATES AND THE USE THEREOF AS SIZING AGENT
DE3922201A1 (en) * 1989-07-06 1991-01-17 Bayer Ag METHOD FOR THE PRODUCTION OF WATER ACID CUBE EXCHANGE RESINS
DE19600163A1 (en) * 1996-01-04 1997-07-10 Bayer Ag Process for the continuous production of superabsorbent polymers from PAN emulsions
JP3982046B2 (en) 1997-04-16 2007-09-26 ソニー株式会社 Polymer flocculant
DE69839737D1 (en) * 1997-04-16 2008-08-28 Sony Corp Process for the preparation of a high molecular weight flocculant
DE19731627A1 (en) * 1997-07-23 1999-01-28 Degussa Granules containing titanium silicalite-l
DE10019757A1 (en) * 2000-04-20 2001-10-25 Bayer Ag Process for the production of superabsorbent polymers from polyacrylonitrile precipitation polymers
DE10322441A1 (en) * 2003-05-19 2004-12-09 Bayer Chemicals Ag Alkaline saponification of crosslinked acrylonitrile pearl polymers to give weakly acidic ion-exchanger involves two-stage reaction at different temperatures

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2812317A (en) * 1953-08-19 1957-11-05 Monsanto Chemicals Hydrolyzed polyacrylonitrile polymers and process of preparing same
US3419502A (en) * 1964-10-01 1968-12-31 Nalco Chemical Co Process for dispersing solids in aqueous systems
DE2903267A1 (en) * 1979-01-29 1980-08-07 Hoechst Ag METHOD FOR THE PRODUCTION OF ACRYLIC POLYMERS WITH HIGH WATER SOURCE CAPABILITY AND THE USE THEREOF

Also Published As

Publication number Publication date
ES513003A0 (en) 1983-04-16
DE3123290A1 (en) 1982-12-30
JPS57212204A (en) 1982-12-27
ES8305799A1 (en) 1983-04-16
EP0067362A1 (en) 1982-12-22
ATE21398T1 (en) 1986-08-15
BR8203423A (en) 1983-06-07
DE3272558D1 (en) 1986-09-18
EP0067362B1 (en) 1986-08-13

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