Process for the delignification of lignocellulosic material

Details Process for the delignification of lignocellulosic material Process for the delignification of lignocellulosic material

D - Textiles, Paper

21

C

8/78.1, 9/16.5

D21C 3/00 (2006.01) D21C 3/22 (2006.01) D21C 9/10 (2006.01)

Patent

CA 1039908

ABSTRACT OF THE DISCLOSURE A process is provided for the delignification of lignocellulosic material in raw or in pulp form, which comprises carrying out the de- lignification with oxygen and alkali in the presence of a manganese compound improving the selectivity of the delignification, and increasing the rate of delignification. In a preferred embodiment of the invention the ligno- cellulosic material prior to the delignification is treated to remove copper, cobalt and iron compounds which catalyze the degradation of carbohydrates.

221564

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