Process for the removal of alkali metal halides from cellulose e

Details Process for the removal of alkali metal halides from cellulose e Process for the removal of alkali metal halides from cellulose e

1981-09-08

1982-12-21

Albrecht, Dennis L.

Compositions

Compositions containing a single chemical reactant or plural...

Organic reactant

252 891, 25217414, 25217417, 25217425, 252DIG15, 536 90, C11D 322, C11D 337, C11D 1102, C08B 1120

Patent

active

043648363

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.

REFERENCES:
patent: 2107005 (1938-02-01), Le Fevre et al.
patent: 3453261 (1969-07-01), Scherff
patent: 4048433 (1977-09-01), Burns et al.
patent: 4100094 (1978-07-01), Burns et al.
patent: 4131558 (1978-12-01), Bailey et al.
patent: 4136038 (1979-01-01), Pracht et al.
patent: 4138352 (1979-02-01), Teot et al.
patent: 4174305 (1979-11-01), Burns et al.
Chemical Abstracts, vol. 85, 1976, 34903s, p. 108 & SU-A-511 325 (N. N. Khin) 4/76.

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