光叶楮白皮生物法制浆可漂性的研究

对光叶楮白皮生物浆化学组分进行了比较分析,并采用不同漂白方法对其进行了漂白实验。结果表明,光叶楮白皮生物浆具有较好的易漂性,经H2O2漂白后,白度达到55.5%;单段次氯酸盐漂白的有效氯用量高于3%时,白度变化较小;氧脱木素的用碱量增至4%时,白度已达到70.6%,再增加用碱量,白度提高和KMnO4值降低幅度较小;氧脱木素后进行H2O2补充漂白,可使白度达76.5%,达到了生产长纤维纸浆的白度要求。

Study on the Bleachability of the Bio-Pulp of Guangyechu White Bast

The chemical compositions of the pulp from Guangyechu white bast produced by biological process were analyzed,and the pulp bleaching with different bleaching processes was investigated.The results indicated that the bio-pulp of Guangyechu white bast has good bleachability.The pulp brightness can reach 55.5%ISO by H2O2 bleaching;the brightness can not obviously increase when the effective chlorine charge is more than 3% in single hypo bleaching stage;the pulp can be bleached to 70.6%ISO when alkali charge is 4% in oxygen caustic bleaching,but increase of alkali charge can not improve the brightness obviously;the pulp can be further bleached up to 76.5%ISO in H2O2 stage.