Production of polysaccharide ethers

Details Production of polysaccharide ethers Production of polysaccharide ethers

C - Chemistry, Metallurgy

08

B

C08B 11/20 (2006.01) C08B 11/08 (2006.01)

Patent

CA 2339374

Processes for the production of polysaccharide ethers, e.g. cellulose ethers, are disclosed wherein salts formed during the process, e.g., sodium nitrate or sodium acetate, are converted to their corresponding acids and bases by means of an electric current, preferably in combination with a bipolar membrane and suitable cation and/or anion membranes. The acids and bases recovered from the processes can be recycled, thereby avoiding the need to provide for disposal of the salts.

L'invention concerne des processus de production d'éthers polysaccharidiques, par exemple des éthers de cellulose, les sels formés au cours de ces processus, notamment le nitrate de sodium ou l'acétate de sodium, étant convertis en leurs acides et bases correspondants au moyen d'un courant électrique, de préférence en association avec une membrane bipolaire et des membranes cationique et/ou anionique adéquates. Les acides et les bases récupérés au cours des processus susmentionnés peuvent être recyclés, ce qui évite ainsi d'avoir à jeter lesdits sels.

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