GB1296853A - - Google Patents

Info

Publication number
GB1296853A
GB1296853A GB1296853DA GB1296853A GB 1296853 A GB1296853 A GB 1296853A GB 1296853D A GB1296853D A GB 1296853DA GB 1296853 A GB1296853 A GB 1296853A
Authority
GB
United Kingdom
Prior art keywords
water
cellulose ether
cellulose
crude
particles
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
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 filed Critical
Publication of GB1296853A publication Critical patent/GB1296853A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B11/00—Preparation of cellulose ethers
    • C08B11/20—Post-etherification treatments of chemical or physical type, e.g. mixed etherification in two steps, including purification
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B11/00—Preparation of cellulose ethers

Abstract

1296853 Aqueous solutions of cellulose ethers IMPERIAL CHEMICAL INDUSTRIES Ltd 13 Jan 1970 [31 Jan 1969] 5338/69 Heading C3A An aqueous solution of a cold-water-soluble/ hot-water-insoluble cellulose ether is prepared by adding crude cellulose ether to water heated to a temperature from 55 to 100% of the thermal gel point temperature of the cellulose ether, and thereafter cooling the water with or without gentle agitation. The cellulose ether may be methyl cellulose, methyl ethyl cellulose or a methyl or ethyl hydroxyalkyl cellulose. The crude cellulose ether may comprise particles having at least two dimensions not less than two millimetres. The crude cellulose ether particles may be dried, washed or may have a moisture content of 70% by weight or less before being added to the heated water. An essentially water-insoluble solid material such as clay or metal powder may be added to the heated water as soon as the particles of crude cellulose ether have broken down into a suspension of fibres.
GB1296853D 1969-01-31 1969-01-31 Expired GB1296853A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB533869 1969-01-31

Publications (1)

Publication Number Publication Date
GB1296853A true GB1296853A (en) 1972-11-22

Family

ID=9794242

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1296853D Expired GB1296853A (en) 1969-01-31 1969-01-31

Country Status (2)

Country Link
AU (1) AU1049270A (en)
GB (1) GB1296853A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6225101A (en) * 1985-07-24 1987-02-03 Shin Etsu Chem Co Ltd Production of cellulose ether having low polymerization degree

Also Published As

Publication number Publication date
AU1049270A (en) 1971-07-22

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees