Alkali Pre-extraction before Rice Straw Alkali Pulping
In this paper, the effect of alkali pre-extraction before rice straw alkali pulping was investigated. The rice straw was extracted by water before alkali pre-extraction. In the experiment, some parameters which may affect the alkali pre-extraction were optimized, such as pre-extraction alkaline charge, temperature and time etc. It was shown that dissolved content of hemicellulose and lignin kept on rising with the increase of alkaline charge, pre-extraction temperature and time. But the dissolved content of celluloses had no significant change with these conditions changing. The optimal conditions for alkali pre-extraction before rice straw alkali pulping were obtained as follows: pre-extraction alkaline charge 0.65％, temperature 65℃, liquid-to-solid ratio 1:20, pre-extraction time 4h. Under these conditions mentioned above, cellulose content in rice straw decreased from 34.27％ to 34.04％, polypentanose content in rice straw from 18.81％ to 13.57％, lignin content in rice straw from 13.59％ to 5.35％, ash content in rice straw from 7.15％ to 3.21％, respectivley.
Jun JIANG Guo-xin XUE Yu ZHAO Yan-jun TANG Xiao-hong YAO
Pulp and Papermaking Research Center Key Laboratory of Advanced Textile Materials & Manufacturing Technology of Ministry of Education of China, Zhejiang Sci-Tech University,Hangzhou, 310018, China
国际会议
南京
英文
891-896
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）