Document Type and Number:
Japanese Patent JPH0355598
Kind Code:
B2
Abstract:
A process is provided for preparing cellulose pulp by delignification of lignocellulosic material, which comprises subjecting particulate lignocellulosic material in a pulping zone to the pulping action of a pulping liquor at a temperature at which pulping reactions leading to formation of cellulose pulp proceed, and substances having a molecular weight above about 3500, preferably above about 2000, and preferably above about 1500, are physically separated and removed from the lignocellulosic material and become dispersed in the pulping liquor; in the course of the pulping, withdrawing pulping liquor containing such dispersed substances, and removing such dispersed substances therefrom; and then returning the pulping liquor to the pulping zone.
Application Number:
JP28085385A
Publication Date:
August 23, 1991
Filing Date:
December 12, 1985
Export Citation:
International Classes:
D21C3/02; B01D61/14; D21C11/00
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