二氧化氯漂白技术用于提高竹浆粕白度的研究  

Improving Brightness of Bamboo Dissolving Pulp by Chlroine Dioxide Bleaching

作　　者：陈秋艳[1] 曹石林[2] 马晓娟[2] 陈礼辉[2] 黄六莲[2] 

机构地区：[1]福建农林大学生命科学学院,福建福州350002 [2]福建农林大学材料工程学院,福建福州350002

出　　处：《林产化学与工业》2014年第3期103-108,共6页Chemistry and Industry of Forest Products

基　　金：福建省重大科技专项专题(2008HZ0001-1);国家自然科学基金资助项目(31270638)

摘　　要：探讨了竹浆粕生产过程中二氧化氯漂白(D1、D2段)的重要性和必要性,D1段和D2段分别研究了ClO2用量、NaOH用量、温度、时间4个因素及ClO2用量单因素对二氧化氯漂白效果的影响,包括α-纤维素、聚戊糖、白度、卡伯值、黏度、灰分等性能,其中D1段分析了白度提高与浆粕α-纤维素、聚戊糖及灰分的关系。结果表明,D1段最优工艺条件为:ClO2用量1.52%且NaOH用量0.76%(NaOH与ClO2质量比1∶2),温度75℃,时间120 min,浆质量分数10%。经D1段处理后,竹浆白度提高率达到了78.8%,黏度下降率仅为19.55%,漂白选择性高。在D1段漂白工艺的基础上,确定D2段的ClO2用量0.8%,且漂白时间120 min,漂白温度75℃,浆质量分数10%。浆料白度增加的过程中,一定程度上提高了α-纤维素含量同时降低了聚戊糖及灰分等杂质的含量,达到了调整竹浆粕质量指标和提高反应性能的目的。经含有两段二氧化氯漂白的无元素氯漂白流程处理后,竹浆粕最终白度达到了88.2%(ISO)。The importance and necessarity of chlorine dioxide bleaching during production of bamboo dissolving pulp were discussed in present study. Effects of ClO2 dosage, NaOH dosage, bleaching temperature and time in D1 stage, and ClO2 dosage in D2 stage on pulp properties, including α-cellulose content, pentosan content, brightness, Kappa number, pulp viscosity and ash content, were examined respectively. The relationships between pulp brightness and α-cellulose, pentosan, ash contents in D1 stage were established. The results showed that the optimal bleaching for preparing bamboo dissolving pulp with chlorine dioxide（D1） were conducted as the pulp was treated by 1. 52% of ClO2 and 0. 76% of NaOH at 75℃ for 120 minutes. The pulp brightness was increased by 78. 8%, and only a 19. 55% of pulp viscosity was observed after D1 stage. The ClO2 dosage in D2 stage was 0. 8%. And the other conditions were as follows：0. 4% NaOH, 75℃ and 120 min, 10% of pulp quality mark. Theα-cellulose content increased with the rise of pulp brightness, meanwhile, accompanying with the decline of pentosan and ash content. This is positive for the quality modification of the obtained bamboo dissolving pulp. After the bleaching by two stages of chlorine dioxide, the brightness of the final bamboo dissolving pulp reached up to 88. 2% （ISO）.

关 键 词：二氧化氯 竹浆粕 白度 黏度 Α-纤维素 聚戊糖 

分 类 号：TQ35[化学工程] TS7[轻工技术与工程—制浆造纸工程]