在对-甲苯磺酸水溶液中玉米秸秆木质素的提取工艺

Extraction of Lignin From Corn Straw in P-toluenesulfonic Acid Aqueous Solution

木质素是一种重要的可再生资源,可以制备芳香族化合物。传统的木质素提取工艺存在着提取率低、溶剂回收困难等问题,制约着木质素的综合利用。采用对-甲苯磺酸(p-TsOH)有机溶剂法提取玉米秸秆中的木质素,考察了p-TsOH浓度、温度及时间对木质素提取率的影响,确定了最佳工艺条件:p-TsOH浓度70wt%、温度80℃、时间40min,木质素提取率为74.81%。

Lignin is a significant renewable resource,which can prepare aromatic compounds.Problems exist in the traditional extraction process of lignin,such as low extraction rate and difficult solvent recovery,which restrict comprehensive utilization of lignin.In this study,p-toluenesulfonic acid(p-TsOH)organic solvent method was used to extract lignin from corn straw.The effects of p-TsOH concentration,temperature,and time on the extraction rate of lignin were investigated,and the optimal condition was determined:p-TsOH concentration 70wt%,temperature 80℃,and time 40min.Under the optimal condition,the extraction rate of lignin is 74.81%.