欢迎访问《林产化学与工业》，
林产化学与工业

林产化学与工业 ›› 2009, Vol. 29 ›› Issue (4): 41-46.

• 研究报告 • 上一篇    下一篇

硫酸盐竹浆氧脱木质素和全无氯漂白的研究

高慧1,2, 詹怀宇2   

  1. 1. 安徽农业大学 林学与园林学院, 安徽 合肥 230036;2. 华南理工大学 制浆造纸工程国家重点实验室, 广东 广州 510640
  • 收稿日期:2008-06-21 修回日期:1900-01-01 出版日期:2009-08-30 发布日期:2009-08-30

Oxygen Delignification of Bamboo Kraft Pulp and Bleaching Effects Using Totally-chlorine-free Bleaching Sequences

GAO Hui1,2, ZHAN Huai-yu2   

  1. 1. College of Forestry and Gardening, Anhui Agricultural University, Hefei 230036, China;2. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
  • Received:2008-06-21 Revised:1900-01-01 Online:2009-08-30 Published:2009-08-30

PDF (PC)

640

摘要： 通过比较不同条件下氧脱木质素后浆料的卡伯值、黏度、得率、白度和脱木质素选择性等指标,研究了硫酸盐竹浆卡伯值25.6氧脱木质素工艺参数,发现用碱量和温度是决定氧脱木质素效果的主要因素。最佳工艺条件为:用碱量 3.5%,温度 85℃,氧气压力 0.6 MPa,保温时间 80 min。两段氧脱木质素(中间不洗涤)可以提高木质素脱除率和选择性。研究还发现,在氧碱脱木质素过程中加入醌类混合物助剂(表示为Oq),可使浆料的黏度和氧脱木质素的选择性大大提高。采用OQ(PO)、(O1O2)Q(PO)、OQ(PO)1(PO)2和OqQ(PO) 4种短漂序都可使竹浆白度达到 80%(ISO) 以上,且具有很好的白度稳定性。OQ(PO)、(O1O2)Q(PO)和OQ(PO)1(PO)2 3种漂序漂后浆纸页强度性能相近,OqQ(PO)漂后浆的抗张指数、撕裂指数和耐破指数明显高于其它3种漂序。

关键词: 硫酸盐竹浆, 氧脱木质素, 全无氯漂白

Abstract: Bamboo kraft pulp with a Kappa number 25.6 was sampled, and oxygen delignification and totally-chlorine-free bleaching sequences were applied to bleach these bamboo pulp samples. By investigating pulp yield, Kappa number, viscosity, brightness of pulp, and delignification-selectivity, ithas been proven that caustic soda dosage and reaction temperature were major factors for oxygen delignification. The optimal conditions for oxygen delignification were proposed as follows:alkali dosage of 3.5% on o.d. pulp-mass, reaction temperature 85℃, oxygen pressure 0.6 MPa, and temperature retention time 80 min. Two stages of oxygen delignification were used and no washing was required between each stage. It was found that delignification efficiency and selectivity to lignin-removal were improved significantly. In addition, addinghydroquinone compounds (Oq) during oxygen delignification can improved greatly the qualities of delignified pulps such ashigher viscosity and better selectivity of delignification. The brightness levels of all bleached pulps, using OQ(PO), (O1O2)Q(PO), OQ(PO)1(PO)2 and OqQ(PO) bleaching sequences, individually, were increased up to more than 80%(ISO). Strength properties of bleached pulps using OQ(PO), (O1O2)Q(PO) or OQ(PO)1(PO)2 bleaching sequence, show insignificant differences, while tensile, tearing and burst indices of bleached pulp using OqQ(PO) bleaching sequence were remarkablyhigher than other three sequences.

Key words: bamboo kraft pulp, oxygen delignification, totally-chlorine-free bleaching

中图分类号: 

版权所有 © 中国林业科学研究院林产化学工业研究所　苏ICP备08107184号-3