Method for manufacturing cellulose carbamate

Details Method for manufacturing cellulose carbamate Method for manufacturing cellulose carbamate

C - Chemistry, Metallurgy

08

B

C08B 15/06 (2006.01)

Patent

CA 2474465

The invention relates to a method for manufacturing cellulose carbamate. In the method, an auxiliary agent and urea in solution form and possibly in solid form are absorbed into cellulose, and a reaction between cellulose and urea is carried out in a mixture containing cellulose, a liquid, the auxiliary agent, and urea. The absorption of the auxiliary agent and urea into cellulose, and the reaction between the cellulose and the auxiliary agent at least partly are carried out in a working device. According to the invention, it is possible to manufacture cellulose carbamate without ammonia, organic solvents or other auxiliary agents, by using only a small quantity of water as a medium.

L'invention concerne un procédé de fabrication de carbamate de cellulose. Selon ce procédé, un agent auxiliaire et de l'urée sous forme de solution ou éventuellement sous forme solide sont absorbés dans de la cellulose, une réaction entre la cellulose et l'urée étant réalisée dans un mélange contenant de la cellulose, un liquide, ledit agent auxiliaire et de l'urée. L'absorption de l'agent auxiliaire et de l'urée dans la cellulose et la réaction entre la cellulose et l'agent auxiliaire sont au moins en partie réalisées dans un dispositif de traitement. Selon l'invention, il est possible de fabriquer du carbamate de cellulose sans ammoniac ni solvants organiques ou autres agents auxiliaires en n'utilisant qu'une faible quantité d'eau comme milieu.

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