ES419817A1 - Continuous saponification of vinyl acetate polymers - Google Patents

Continuous saponification of vinyl acetate polymers

Info

Publication number
ES419817A1
ES419817A1 ES73419817A ES419817A ES419817A1 ES 419817 A1 ES419817 A1 ES 419817A1 ES 73419817 A ES73419817 A ES 73419817A ES 419817 A ES419817 A ES 419817A ES 419817 A1 ES419817 A1 ES 419817A1
Authority
ES
Spain
Prior art keywords
vinyl acetate
poly
reaction
hydrolysis
mol
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
ES73419817A
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.)
Wacker Chemie AG
Original Assignee
Wacker Chemie 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 Wacker Chemie AG filed Critical Wacker Chemie AG
Publication of ES419817A1 publication Critical patent/ES419817A1/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
    • B65G15/30—Belts or like endless load-carriers
    • B65G15/32—Belts or like endless load-carriers made of rubber or plastics
    • B65G15/42—Belts or like endless load-carriers made of rubber or plastics having ribs, ridges, or other surface projections
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
    • B65G2201/04—Bulk

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)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

Procedure for the continuous transesterification of poly (vinyl acetate) or copolymers containing at least 70% by weight of vinyl acetate, to form poly (vinyl alcohol) by intimate mixing of a methanolic solution of poly (vinyl acetate) or of vinyl acetate copolymer, with alkaline catalyst solution and carrying out the reaction, without additional mixing, on a conveyor belt as well as crumbling, neutralization, washing and drying, characterized in that the reaction is carried out in two stages, in the first stage, alcohololysis is carried out in a reaction device consisting of a divided compartment conveyor belt with transverse ribs, and eventually also with longitudinal ribs, until reaching a degree of hydrolysis of at least 55 mol% and maximum 80 mol%, the mass obtained in this way is ground to the desired grain size, and in the second stage it is brought to hydrolysis ended. (Machine-translation by Google Translate, not legally binding)
ES73419817A 1972-10-20 1973-10-20 Continuous saponification of vinyl acetate polymers Expired ES419817A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2251603A DE2251603A1 (en) 1972-10-20 1972-10-20 PROCESS FOR CONTINUOUS REESTERIFICATION OF POLYVINYL ACETATE

Publications (1)

Publication Number Publication Date
ES419817A1 true ES419817A1 (en) 1976-03-01

Family

ID=5859633

Family Applications (1)

Application Number Title Priority Date Filing Date
ES73419817A Expired ES419817A1 (en) 1972-10-20 1973-10-20 Continuous saponification of vinyl acetate polymers

Country Status (8)

Country Link
JP (1) JPS518999B2 (en)
BE (1) BE806338A (en)
DE (1) DE2251603A1 (en)
ES (1) ES419817A1 (en)
FR (1) FR2203836B1 (en)
GB (1) GB1422027A (en)
IT (1) IT1008562B (en)
NL (1) NL7314443A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999032377A1 (en) * 1997-12-18 1999-07-01 Jean Daniel Stucki Conveyor belt with entraining interlinked telescoping triple cleat assemblies
DE10105656A1 (en) 2001-02-08 2002-08-22 Wacker Polymer Systems Gmbh Process for the production of polyvinyl alcohol
JP5393383B2 (en) 2009-09-30 2014-01-22 Ｈｏｙａ株式会社 Endoscope treatment tool raising operation device
DE102013225178A1 (en) 2013-12-06 2015-06-11 Wacker Chemie Ag Process for the preparation of polyvinyl alcohol
CN107934373A (en) * 2017-11-24 2018-04-20 醴陵市绿源商贸有限公司 The explosion-proof method and its blast resistance construction of a kind of feed belt

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1123345A (en) * 1955-06-22 1956-09-20 Hutchinson Cie Ets Further training in conveyor belts
US3072624A (en) * 1959-12-29 1963-01-08 Kurashiki Rayon Co Saponification process for preparation of polyvinyl alcohol
CS150962B2 (en) * 1967-09-09 1973-09-17

Also Published As

Publication number Publication date
IT1008562B (en) 1976-11-30
GB1422027A (en) 1976-01-21
BE806338A (en) 1974-04-22
JPS4974788A (en) 1974-07-18
DE2251603A1 (en) 1974-04-25
FR2203836B1 (en) 1976-11-19
FR2203836A1 (en) 1974-05-17
NL7314443A (en) 1974-04-23
JPS518999B2 (en) 1976-03-23

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