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

1994-12-12

1996-08-06

Nutter, Nathan M.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

536124, 536125, 536126, C08B 1508

Patent

active

055435114

ABSTRACT:
Level-off DP cellulose, which can be disaggregated in aqueous suspension with the application of mechanical force to give microcrystalline cellulose, is prepared by an environmentally friendly partial hydrolysis of cellulose in such a manner that the cellulose is subjected to partial hydrolysis 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.degree. C., at a temperature of 100.degree. to 200.degree. 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.degree. C., and in a temperature range from 140.degree. to 180.degree. C.

REFERENCES:
patent: 3012914 (1961-12-01), Battista et al.
patent: 3278519 (1966-10-01), Battista et al.

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