Process for preparing fine-particle polysaccharide derivatives

Details Process for preparing fine-particle polysaccharide derivatives Process for preparing fine-particle polysaccharide derivatives

C - Chemistry, Metallurgy

08

J

C08J 3/12 (2006.01) C08B 11/20 (2006.01)

Patent

CA 2278488

The invention concerns a novel, particularly economical, process for preparing powdery polysaccharide derivatives, in particular cellulose derivatives with a thermal flocculation point. The process includes the swelling or dissolution of the polysaccharide derivative in a solvent or solvent mixture, breaking up/comminuting the swollen or dissolved polysaccharide derivative by thermal and/or mechanical liquid separation, and optionally a drying step.

L'invention concerne un nouveau procédé particulièrement économique permettant de préparer des dérivés de polysaccharide pulvérulents, notamment de dérivés de cellulose ayant un point de floculation thermique. Ce procédé comprend le gonflement ou la dissolution du dérivé de polysaccharide dans un solvant ou un mélange de solvants, la décomposition/désintégration du dérivé de polysaccharide gonflé ou dissous, par séparation thermique et/ou mécanique de liquide, ainsi qu'éventuellement une étape de séchage.

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