PREPARATION OF DISSOLVING PULP FROM COMMERCIAL BAMBOO PULPBOARD

摘要：

Uniform polymerization degree and high α-cellulose content are necessary for producing viscose fiber from pulpboard. In this experiment, a bleached kraft bamboo pulpboard was used as the raw material for making dissolving pulp using two oxidation stages, the first being hypochlorite (H) and the second being hydrogen peroxide (P). The experiment was carried out to study the effects of the first hypochlorite oxidation conditions on the yield, polymerization degree and α-cellulose of bamboo dissolving pulp, when the conditions of the second hydrogen peroxide stage were kept as fallows: hydrogen peroxide dosage 2.5％, EDTA dosage 0.1％, temperature 90℃, time 1.5h, initial pH 10.5~11. The results showed that the optimized conditions for the H were: available chlorine dosage 3.5％ (based on dry raw materials), initial pH 11, temperature 35 ℃, time 2h. Under these conditions and when the conditions of the P stage were kept as hydrogen peroxide dosage 2.5％, temperature 90 ℃, time 1.5h, initial pH 10.5~11, the yield, polymerization degree and a-cellulose content of bamboo dissolving pulp were 82.7％, 576 and 92％ respectively, which basically met the quality requirement of dissolving pulp.

关键词： bamboo dissolving pulp a-cellulose polymerization degree hypochlorite oxidative degradation

作者: Yongjian Xu Lingyun Tang Xuefeng Yin

作者单位: Shanxi Province Key Laboratory of Papermaking Technology and Specialty Paper, Shanxi University of Science & Technology, Xi an, 710021, China

会议类型: 国际会议

会议名称: 16th International Symposium on Wood,Fiber and Pulping Chemistry(第十六届木材、纤维及制浆化学国际会议)

会议地点: 天津

会议语种:英文

页码: 418-421

在线出版日期: 2011-06-08（万方平台首次上网日期，不代表论文的发表时间）