GB967333A - Process and apparatus for washing highly polymeric organic substances in a continuous manner - Google Patents

Process and apparatus for washing highly polymeric organic substances in a continuous manner

Info

Publication number
GB967333A
GB967333A GB4381260A GB4381260A GB967333A GB 967333 A GB967333 A GB 967333A GB 4381260 A GB4381260 A GB 4381260A GB 4381260 A GB4381260 A GB 4381260A GB 967333 A GB967333 A GB 967333A
Authority
GB
United Kingdom
Prior art keywords
washing liquid
washing
polymeric
substance
water
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
GB4381260A
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
Priority claimed from DEW26982A external-priority patent/DE1168641B/en
Application filed by Wacker Chemie AG filed Critical Wacker Chemie AG
Publication of GB967333A publication Critical patent/GB967333A/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
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/04—Polysiloxanes
    • C08G77/32—Post-polymerisation treatment
    • C08G77/34—Purification
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D11/00—Solvent extraction
    • B01D11/02—Solvent extraction of solids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D11/00—Solvent extraction
    • B01D11/04—Solvent extraction of solutions which are liquid
    • B01D11/0446—Juxtaposition of mixers-settlers
    • B01D11/0457—Juxtaposition of mixers-settlers comprising rotating mechanisms, e.g. mixers, mixing pumps
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B37/00—Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
    • C08B37/006—Heteroglycans, i.e. polysaccharides having more than one sugar residue in the main chain in either alternating or less regular sequence; Gellans; Succinoglycans; Arabinogalactans; Tragacanth or gum tragacanth or traganth from Astragalus; Gum Karaya from Sterculia urens; Gum Ghatti from Anogeissus latifolia; Derivatives thereof
    • C08B37/0087—Glucomannans or galactomannans; Tara or tara gum, i.e. D-mannose and D-galactose units, e.g. from Cesalpinia spinosa; Tamarind gum, i.e. D-galactose, D-glucose and D-xylose units, e.g. from Tamarindus indica; Gum Arabic, i.e. L-arabinose, L-rhamnose, D-galactose and D-glucuronic acid units, e.g. from Acacia Senegal or Acacia Seyal; Derivatives thereof
    • 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
    • C08F6/00—Post-polymerisation treatments
    • C08F6/24—Treatment of polymer suspensions
    • 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
    • C08F6/00—Post-polymerisation treatments
    • C08F6/26—Treatment of polymers prepared in bulk also solid polymers or polymer melts
    • C08F6/28—Purification

Abstract

In a process for continuously washing at raised temperature highly polymeric organic substances having a viscosity of 102 to 105 poises at the washing temperature, the preheated highly polymeric organic substance in a viscous state is reduced to a plurality of fine filaments by passage through nozzles or a perforated plate, is treated while flowing freely, under a pressure of 5 to 30 atmospheres, with a hot washing liquid in which the polymeric organic substance is substantially insoluble but which dissolves the impurities, the polymeric substance and washing liquid are subjected to further intimate mixing, and the polymeric substance is subsequently separated from the washing liquid at the same or lower pressure. The flowing polymeric substance may be subjected to a stream of hot washing liquid directed transversely to the direction of flow of the polymeric substance, and the further mixing may be effected by passing the polymeric substance and washing liquid through an emulsifier. Apparatus suitable for carrying out the process of the invention is described and illustrated, and examples describe the washing of (1) polyvinyl acetate with water, (2) a copolymer of ethylene and propylene with alcohol, (3) a copolymer of vinyl acetate and vinyl laurate with water, (4) polyvinyl propionate and a copolymer of vinyl acetate and dibutyl maleate with water, (5) a melt of polyvinyl acetate and dibutyl phthalate, (6) polyethylene and polypropylene with isopropanol, (7) a silicone resin with water, (8) gum arabic with methanol and (9) a wax-like highly condensed aminocrotonic acid ester with isopropanol.
GB4381260A 1959-12-30 1960-12-20 Process and apparatus for washing highly polymeric organic substances in a continuous manner Expired GB967333A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEW26982A DE1168641B (en) 1959-12-30 1959-12-30 Method and device for the continuous washing of highly viscous, polymeric, organic substances

Publications (1)

Publication Number Publication Date
GB967333A true GB967333A (en) 1964-08-19

Family

ID=7598510

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4381260A Expired GB967333A (en) 1959-12-30 1960-12-20 Process and apparatus for washing highly polymeric organic substances in a continuous manner

Country Status (2)

Country Link
BE (1) BE598720A (en)
GB (1) GB967333A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3931498A1 (en) * 1988-09-22 1990-03-29 Toyo Engineering Corp METHOD FOR CLEANING A POLYMER
DE4109527A1 (en) * 1990-03-22 1991-09-26 Toyo Engineering Corp METHOD FOR CLEANING A POLYMER
US5237048A (en) * 1988-09-22 1993-08-17 Toyo Engineering Corporation Method for purifying polymer

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3931498A1 (en) * 1988-09-22 1990-03-29 Toyo Engineering Corp METHOD FOR CLEANING A POLYMER
GB2223022B (en) * 1988-09-22 1992-09-16 Toyo Engineering Corp Method for purifying polymer
US5237048A (en) * 1988-09-22 1993-08-17 Toyo Engineering Corporation Method for purifying polymer
DE4109527A1 (en) * 1990-03-22 1991-09-26 Toyo Engineering Corp METHOD FOR CLEANING A POLYMER
GB2242434A (en) * 1990-03-22 1991-10-02 Toyo Engineering Corp Purifying a polymer melt using high pressure
GB2242434B (en) * 1990-03-22 1994-06-01 Toyo Engineering Corp A method for purifying a polymer

Also Published As

Publication number Publication date
BE598720A (en) 1961-06-30

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