Use of cyclic keto compounds as additives in vapor phase...

Details Use of cyclic keto compounds as additives in vapor phase... Use of cyclic keto compounds as additives in vapor phase...

D - Textiles, Paper

21

C

9/16

D21C 3/02 (2006.01) D21C 1/00 (2006.01) D21C 3/22 (2006.01)

Patent

CA 1132763

CIL 576 ABSTRACT OF THE DISCLOSURE Delignification of lignocellulosic material by treatment with an alkaline liquor in the presence of a cyclic keto compound such as anthraquinone. The ligno- cellulosic material in subdivided form is first impregnated with the alkaline liquor containing a suitable amount of the cyclic keto compound whereafter any excess liquor is drained. The impregnated material is then cooked by heating.

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