Organic compounds -- part of the class 532-570 series – Organic compounds – Carbohydrates or derivatives
Patent
1980-03-03
1981-10-20
Griffin, Ronald W.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carbohydrates or derivatives
252DIG15, 536 90, 536 91, 536 99, 536100, C08B 1120, C08B 1122
Patent
active
042962358
ABSTRACT:
A process for the purification of cold-water soluble cellulose ethers containing alkali metal halides consisting essentially of suspending a cold-water-soluble cellulose ether crude reaction product containing 25% by weight or more of alkali metal halides, based on the dry weight, in an aqueous solution containing from 4% to about 25% by weight of one or more water-soluble salts of acids selected from the group consisting of polybasic inorganic acids and organic polycarboxylic acids with agitation at a temperature of from 10.degree. C. to 50.degree. C., separating the purified cellulose ether solids and optionally repeating the suspending and separating steps one or more times. The resulting material can be employed in washing and cleansing composition slurries for spray-drying. The process is especially suitable for the treatment of methyl cellulose or water-soluble mixed ethers of methyl or ethyl cellulose with a sodium sulfate solution.
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Griffin Ronald W.
Henkel Kommanditgesellschaft auf Aktien
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