Method for modifying starch and starch derivatives in a...

C - Chemistry – Metallurgy – 08 – B

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C08B 30/12 (2006.01) B01J 8/10 (2006.01) B01J 8/24 (2006.01) C08B 30/16 (2006.01) C08B 30/18 (2006.01) C08B 31/00 (2006.01)

Patent

CA 2545327

A method of modifying starch or starch derivatives comprising: introducing a continuos flow of starch substrate, gas and, optionally, one or more reagents, into a reactor, wherein the starch substrate has a moisture content between 0 and 45% by weight, a residence time in the reactor of between 1 and 60 minutes and is heated to between 50 and 220~C, characterized in that the starch substrate and the gas are introduced into the reactor in opposing directions and in that the reactor has a tubular body comprising a rotating shaft upon which is disposed one or a plurality of blades.

L'invention concerne une méthode de modification d'amidon ou de dérivés d'amidon, qui consiste à introduire un flux continu d'un substrat d'amidon, de gaz, et éventuellement d'un ou de plusieurs réactifs dans un réacteur. Le substrat d'amidon présente une teneur en humidité comprise entre 0 et 45 % en poids, un temps de séjour dans le réacteur compris entre 1 et 60 minutes, et est chauffé à une température comprise entre 50 et 220 ·C. La méthode se caractérise en ce que le substrat d'amidon et le gaz sont introduits dans le réacteur en sens contraires; et que le réacteur présente un corps tubulaire comprenant un arbre rotatif sur lequel est disposé une ou plusieurs lames.

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