三倍体毛白杨低硬度NaOH-AQ浆全无氯漂白的研究

TOTAL-CHLORINE-FREE BLEACHING OF NaOH-AQ PULP OF LOW KAPPA NUMBER FROM TRIPLOID OF CHINESE WHITE POPLAR

通过实验探讨了三倍体毛白杨低硬度NaOH-AQ浆(卡伯值13．5,粘度851 mL／g, 白度37％,ISO)H2O2强化氧脱木质素(QOP)的工艺条件,在此基础上提出了QOP、QP全无氯 漂白的漂序,此漂序可以把该纸浆漂至82．0％(ISO),粘度保持在716 mL／g,漂后纸浆得率 91．78％．而且该漂序可操作性强,是一种适合低硬度NaOH-AQ浆的全无氯漂白新工艺。

Strengthened-oxygen total-chlorine-free （TCF） bleaching of NaOH-AQ pulp of low Kappa number from the triploid of Chinese white poplar（ Populus tomentosa Carr. ） with brightness 37 % （ISO）, Kappa number 13.5 ,viscosity 851 mL/g was bleached with a TCF process-QOp, QP sequence in the laboratory. The bleached pulp with brightness 82.0 % （ISO）, viscosity 716 mL/g at bleached pulp yield 91.78 % was obtained after Q Op, QP bleaching. The data presented in the paper are useful for developing TCF bleaching sequence for the triploid of Chinese white poplar NaOH-AQ pulp of low Kappa number.