Purification of cellulose ethers

Details Purification of cellulose ethers Purification of cellulose ethers

C - Chemistry, Metallurgy

08

B

260/217

C08B 11/20 (2006.01)

Patent

CA 1275650

ABSTRACT Impurities in cellulose ether compositions are removed by providing a functionally effective thickness of a cellulose ether composition to a filtra- tion device, and contacting the thickness, in a manner such that substantial thickness is maintained, with at least one extracting solution in which the impurities in the cellulose ether are soluble such that a gradient impurity concentration is formed. High purity cellulose ethers are prepared, without experiencing large product losses.

503725

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