漂白助剂对蔗渣浆D0EpD1漂白的影响

Effect of Bleaching Additives on D0EpD1 Bleaching of Bagasse Pulp

关键词:  硫酸盐蔗渣浆  表面活性剂  杂多酸  甲醛  D0EpD1漂白

Key Words:bagasse kraft pulp  surface active agent  heteropolyacid  formaldehyde  D0EpD1 bleaching

摘要:以未漂硫酸盐蔗渣浆为原料进行D0EpD1漂白,研究了在D0段分别加入3种助剂(壬基酚聚氧乙烯醚-7（NP-7）、杂多酸（HPA）、甲醛)对蔗渣浆D0EpD1漂白效果的影响。结果表明，D0段ClO₂用量(有效氯)1.6%时,添加3种助剂的最佳用量(对绝干浆)分别为：NP-7为70.6%、HPA为0.6%、甲醛为1.5%；与未加助剂的D0段ClO₂用量1.4%～2.0%范围相比,可分别节约D0段ClO₂用量为：10.0%～14.3%、11.1%～14.3%、20.0%～25.0%,且对浆料性质影响较小。添加甲醛的助漂效果较好。

Abstract:Unbleached bagasse kraft pulp was used as raw material for D0EpD1 bleaching, the effects of addition of three kinds of additives (surfactant NP-7、 heteropolyacid HPA、 formaldehyde) in D0 stage on D0EpD1 bleaching of bagasse pulp were studied. The results showed that the optimum dosages of the three kinds of additives were 0.6% NP-7、 0.6% HPA、 1.5% formaldehyde, respectively, when ClO₂ dosage (active chlorine) (D0) was 0.6%; compared with ClO₂ dosage (D0) was in the range of 1.4%~2.0% without additives, ClO₂ dosages(D0) could be saved 10.0%~14.3%、 11.1%~14.3%、 20.0%~25.0%, respectively, and had little effect on the pulp properties. Among the three additives the effect of formaldehyde was better.