Document Type and Number:
Japanese Patent JPS5436681
Kind Code:
B2
Abstract:
Significant yield increases are obtained in pulping of wood or other lignocellulosic materials with polysulfide liquors through particular control of the times and temperatures of treatment. The lignocellulosic material is treated with a polysulfide liquor at less than 100 DEG C for about 45 minutes, the liquor is removed for reuse, the impregnated lignocellulosic material is quickly steamed to pulping temperature and is pulped at a low temperature of about 160 DEG C for a short period of time.
Application Number:
JP5345674A
Publication Date:
November 10, 1979
Filing Date:
May 15, 1974
Export Citation:
International Classes:
D21C3/02