芦苇预水解硫酸盐法人纤浆粕的制备及其预水解动力学研究  

Study on the Manufacture of Dissolving Pulp from Reed by Prehydrolysis Kraft Process and the Prehydrolysis Kinetics

作　　者：胡可信[1] 曾光明[2] 郭振华[1] 陈启杰[1] 刘艳新[1] 

机构地区：[1]长沙理工大学化学与环境工程学院,湖南长沙410076 [2]湖南大学环境科学与工程学院,湖南长沙410082

出　　处：《中国造纸学报》2007年第1期7-11,共5页Transactions of China Pulp and Paper

基　　金：湖南省教育厅资助科研项目(项目号:03B003)

摘　　要：对芦苇预水解硫酸盐法试制人纤浆粕的预水解硫酸盐蒸煮最佳工艺条件及其动力学进行了研究。结果表明,芦苇的预水解反应为一级反应。水解过程中,只要控制P-因子相同,即可获得同样品质的半料浆。芦苇在175℃下、保温90min即可溶出约75%的戊聚糖和50%的木素。芦苇预水解的最佳条件为:最高温度175℃,保温时间90min,液比1∶6。芦苇预水解后硫酸盐蒸煮的最佳工艺条件为:用碱量10%(对绝干原料,以Na2O计),硫化度15%,最高温度160℃,保温时间30min,液比1∶4。经CEHA四段漂白后,所制得的人纤浆粕各项指标符合标准要求。Two-stage prehydrolysis-kraft pulping and CEHA bleaching process of reed were studied in laboratory. The cooking and bleaching conditions were optimized. The prehydrolysis mechanism of reed was also discussed. The results showed that under the laboratory conditions the removal rate of the materials at about 175℃ approximately follows a pseudo first order law with two distinct phases： the bulk removal and the residual removal of the materials. The prehydrolysis-factor （P-factor） was established. The advantage of using P-factor is to predict compensating adjustments in cooking time and/or temperature to give the same degree of pulping and to produce the pulp with predetermined characteristics. It was found that about 75% of pentosans and about 50% of lignin were removed in three distinct delignification stages. A CEHA bleaching was used. Total chlorine charge in bleaching was 6% （on O.D. pulp）. The results showed that all of the properties meet the quality standards of dissolving pulp.

关 键 词：芦苇 预水解 硫酸盐法 反应动力学 

分 类 号：TS743.1[轻工技术与工程—制浆造纸工程]