利用CaO/PAC选择性去除预水解液中木质素

doi:10.3969/j.issn.0253-2417.2016.05.011

林产化学与工业 ›› 2016, Vol. 36 ›› Issue (5): 75-80.doi: 10.3969/j.issn.0253-2417.2016.05.011

利用CaO/PAC选择性去除预水解液中木质素

周丹丹, 侯庆喜, 刘苇, 冯清

天津科技大学天津市制浆造纸重点实验室, 天津 300457

收稿日期:2015-11-23 出版日期:2016-10-25 发布日期:2016-11-05
通讯作者: 侯庆喜,教授,博士生导师,主要从事清洁制浆与生产研究工作;E-mail:qingxihou@tust.edu.cn。 E-mail:qingxihou@tust.edu.cn
作者简介:周丹丹(1989-),女,山东济宁人,硕士生,主要从事生物质资源化研究工作
基金资助:
国家自然科学基金资助项目（31270630）

Selectively Removing Lignin from Pre-hydrolysis Liquor by Combined CaO/PAC Method

ZHOU Dan-dan, HOU Qing-xi, LIU Wei, FENG Qing

Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science & Technology, Tianjin 300457, China

Received:2015-11-23 Online:2016-10-25 Published:2016-11-05

摘要/Abstract

摘要： 利用CaO结合聚合氯化铝（PAC）来选择性去除预水解液中的木质素。分别探讨了酸化法、碱化法及其结合PAC选择性去除木质素的效果，并分析了PAC选择性去除木质素的机理。结果表明：酸化法pH值为1.5时，木质素去除率最大（杨木15.68%，麦草18.76%）；而采用CaO调节pH值为12时，木质素去除率最大（杨木33.33%，麦草30.67%），碱化法去除效果优于酸化法。添加CaO将pH值调至10并使PAC浓度为36 mmol/L时，预水解液中木质素的去除率（杨木50.59%，麦草49.17%）及选择性（杨木86.57%，麦草82.76%）效果最佳。

关键词: 预水解液, 木质素, PAC, CaO

Abstract: A noval process, based on the combination of CaO and polyaluminium chloride (PAC) flocculation, was developed to selectively remove lignin from pre-hydrolysis liquor (PHL). The selective removals of lignin by using acidification, alkalization and combined process were investigated and the mechanism of removal lignin by PAC was investigated. The results showed that the maximum removal rates (poplar chip 15.68% and wheat straw 18.76%) of acidification were obtained at pH value of 1.5 and the removal rates of CaO treatment reached the maximum (poplar chip 33.33% and wheat straw 30.67%) as adjusting the pH value with CaO to 12. After the CaO treatment for the hydrolysate, both the removal rate and selectivity of lignin were higher than those of acidification treatment. Using CaO to adjust pH to 10 and then adding PAC to 36 mmol/L, the removal rate of lignin in pre-hydrolysis liquor reached the maximum, the numbers were 50.59% and 49.17% for poplar chips and wheat straw, respectively. Meanwhile, the selectivites were the best, represents 86.57% and 82.76% for poplar chips and wheat straw, respectively.

Key words: pre-hydrolysis liquor, liginin, PAC, CaO

中图分类号:

TQ35
X793

周丹丹, 侯庆喜, 刘苇, 冯清. 利用CaO/PAC选择性去除预水解液中木质素[J]. 林产化学与工业, 2016, 36(5): 75-80.

ZHOU Dan-dan, HOU Qing-xi, LIU Wei, FENG Qing. Selectively Removing Lignin from Pre-hydrolysis Liquor by Combined CaO/PAC Method[J]. Chemistry and Industry of Forest Products, 2016, 36(5): 75-80.

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利用CaO/PAC选择性去除预水解液中木质素

Selectively Removing Lignin from Pre-hydrolysis Liquor by Combined CaO/PAC Method

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