Process for the preparation of level-off dp cellulose

Details Process for the preparation of level-off dp cellulose Process for the preparation of level-off dp cellulose

C - Chemistry, Metallurgy

08

B

C08B 15/00 (2006.01) C08B 15/02 (2006.01)

Patent

CA 2137890

Level-off DP cellulose, which can be disaggrega- ted in aqueous suspension with the application of mechanical force to give microcrystalline cellulose, is prepared by partial hydrolysis of cellulose in such a manner that the cellulose is subjected to partial hydro- lysis in a pressurized reactor using water under a gas pressure of 0.1 to 60 bar of oxygen and/or carbon dioxide, measured at 20°C, at a temperature of 100 to 200°C until the levelling-off DP has been reached. The partial hydrolysis is preferably carried out under a gas pressure of 0.5 to 30 bar, measured at 20°C, and in a temperature range from 140 to 180°C.

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