METHOD OF PRODUCTION OF SULPHATE PULP FROM LARCH WOOD

摘要

FIELD: textiles, paper.;SUBSTANCE: method is carried out with the use of three batch-operated boilers, sequentially interconnected by a liquid phase, and the two stages of extraction - with water and then black liquor, and the aqueous extract is removed from the boilers by its displacement by the black liquor, and the black liquor is removed by its displacement by the cooking liquor. The duration of the complete filling of the boiler with the liquid phase and, respectively, equal to it duration of the complete replacement in the boiler of one liquid phase with its displacement by another phase, are equal to duration of efficient extraction determined experimentally.;EFFECT: invention enables to improve the mechanical properties of pulp, to reduce Kappa number, and reduce the duration of extraction when increasing the concentration of arabinogalactan in the aqueous extract.;5 cl, 2 tbl