Procedure for precipitating cellulose derivatives

Details Procedure for precipitating cellulose derivatives Procedure for precipitating cellulose derivatives

C - Chemistry, Metallurgy

08

B

260/215

C08B 3/00 (2006.01)

Patent

CA 1189068

ABSTRACT OF THE DISCLOSURE The present invention provides a process for pre- cipitating cellulose carbamate from an aqueous alkali solu- tion. The solution is brought into contact with an aqueous solution of sulphuric acid containing one or several cations selected from the group consisting of Na, Al, Mg, Zn and Ca cations, whereby in the precipitation of cellulose carbamate the advantage is gained that the dry solids contents of the fibre can be made sufficiently high.

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