水热预处理对未漂硫酸盐绿竹溶解浆己烯糖醛酸含量的影响  

Effect of hydrothermal pretreatment on hexenuronic acid content in unbleached kraft bamboo dissolving pulp

作　　者：杨雪芳[1] 胡会超[1] 黄六莲[1] 陈礼辉[1] 

机构地区：[1]福建农林大学材料工程学院,福建福州350002

出　　处：《福建农林大学学报（自然科学版）》2016年第3期336-341,共6页Journal of Fujian Agriculture and Forestry University:Natural Science Edition

基　　金：中央财政林业科技推广示范项目(2014YC12);福建省产业技术联合创新项目(闽发改高技2014514)

摘　　要：以绿竹为原料,研究了蒸煮条件、水热预处理时长和制浆方法对纸浆己烯糖醛酸(Hex A)生成规律的影响,并探讨了Hex A含量与水热预处理过程木聚糖去除率、硫酸盐浆(Kraft Pulp简称KP浆)卡伯值和戊聚糖含量之间的关系.结果表明:纸浆Hex A含量随水热预处理时长的增加而逐渐下降,但超过80 min水热预处理不再显著抑制Hex A的生成;制浆前分离预处理液与竹片可降低Hex A的生成量,但效果不显著;纸浆的Hex A含量随用碱量增加呈先升高而后降低的趋势。因此综合考虑纸浆卡伯值、木聚糖含量、Hex A生成量及成本,用碱量不应高于19%;在上述条件下,达到相同纸浆卡伯值(15)水热预处理可将Hex A的生成量降低90%.To investigate economically feasible and environmental friendly approach that reduce hexenuronic acid （HexA） ofbamboo in paper industry, hot water pretreatment （HWP） and sulphate pulping method on the formation rule of HexA was studied.In addition, relationship between HexA content in unbleached pulp with xylan removal rate during HWP, Kappa number andpentosan content of pulp were also investigated. Results showed that HexA content of dissolving pulp decreased as duration of HWPprolonged, but HexA level did not significantly drop after being hot-water treated over 80 min. A slight decrease in HexA content wasdetected in kraft dissolving pulp that pretreated hot water was leached from bamboo before pulping. Within the range of alkalineaddition between 15% and 21%, HexA content increased at first and then decreased after additive alkaline was over 19%. Inconsideration of Kappa number, xylan content of unbleached pulp, and chemical cost, HWP for 80 rain with alkaline addition under19% were the optimum processing condition, resulting in 90% reduction in HexA content with Kappa number of 15 that met thestandard of kraft dissolving pulp.

关 键 词：水热预处理 硫酸盐溶解浆 己烯糖醛酸 卡伯值 戊聚糖 

分 类 号：TS727.3[轻工技术与工程—制浆造纸工程]