FIELD: cellulose production.
SUBSTANCE: present invention relates to a method for producing cellulose. The method includes at least the following stages: a) wood chips or other crushed lignocellulosic fibrous material is treated with polysulfide-containing cooking liquor during the impregnation stage at a temperature in the range of 90–145°C, and b) the suspension of fibrous material from step a) is heated to cooking temperature and subjected to cooking to produce a pulp having a permanganate number in the range of 10-120, wherein after step a) mercaptide ions are added to the suspension of fibrous material and the fibrous material is subjected to processing at the cooking temperature in step b).
EFFECT: effective performance.
16 cl, 1 dwg, 2 tbl
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| COMPOSITION FOR PREPARING CELLULOSE | 1995 |
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| METHOD FOR PRODUCING BLEACHED SULFATE CELLULOSE | 1991 |
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SU1112081A1 |
