Purification of cellulose ether reaction product

Details Purification of cellulose ether reaction product Purification of cellulose ether reaction product

1979-03-05

1980-10-21

Griffin, Ronald W.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

536 84, 536 85, 536 91, 536 94, 536100, C08B 1120

Patent

active

042295726

ABSTRACT:
In the preparation of organosoluble cellulose ethers, the content of alkali metal (hydroxides and the salts thereof) in the resulting cellulose ether is reduced by forming a solution of the cellulose ether and an organic solvent, converting the alkali metal hydroxide therein to an alkali metal salt and heating the resulting solution at conditions sufficient to (1) increase the size of the alkali metal salt particles and (2) remove any water therefrom. Filtering the resulting mixture and drying the filtrate yields a cellulose ether containing a very small percentage of alkali metal salt, e.g., often less than about 500 ppm.

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Chemical Abstracts, vol. 76, No. 26, Jun. 26, 1972, p. 155875g.
Chemical Abstracts, vol. 78, No. 10, Mar. 12, 1973, p. 60323c.
Chemical Abstracts, vol. 79, No. 12, Sep. 24, 1973, p. 68065m.

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