Rapid and productive extraction of high purity cellulose material via selective depolymerization of the lignin-carbohydrate complex at mild conditions
作者单位：Beijing Key Laboratory of Ionic Liquids Clean ProcessKey Laboratory of Green Process and EngineeringState Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of Sciences College of Chemistry and Chemical EngineeringUniversity of Chinese Academy of Sciences
会议名称：《中国化学会第十九届全国化学热力学和热分析学术会议》
会议日期：2018年
学科分类：082903[工学-林产化学加工工程] 08[工学] 0829[工学-林业工程]
关 键 词：Ionic liquids amino sulfonic acid cornstalk depolymerization
摘 要：The ILs are effective solvent to dissolve cellulose,however there were much room to improve in the pretreatment of lignocellulose using pure *** this work,an new green cellulose extraction method – the selective degradation dissolution extraction（SDDE） method based on the [Bmim]Cl–AS（*** sulfonic acid（AS）） solvent system – was found which could rapidly extract a high yield and purity of cellulose from cornstalk at relatively low temperatures in a remarkably short *** the SDDE method,the lignin-carbohydrate complex protective layer（LCCPL）,which wraps around the cellulose,was selectively depolymerized into small molecules;as a result,the rapid dissolution of lignocellulose biomass and the efficient removal of lignin and hemicellulose from the regenerated material（RM） were successfully *** cellulose content of the RM could reach 99.16 ± 0.15%,which is the highest purity of cellulose extracted from the lignocellulose biomass in one step by IL solvent *** delignification rate could reach 97.56 ± 0.29% while the hemicellulose was completely removed in only 1 h after the cornstalk powder was dissolved in [Bmim]Cl–AS（the AS content was 1.5 wt%） at 100 °*** the mild fractionation conditions reduced consumption of energy greatly as well as that the additive was cheap and environmentally friendly,the SDDE might be able to provide a feasible path to achieve an efficient cellulose extraction from lignocellulose *** addition,utilization of the lignocellulose biomass mostly focused on the preparation of bioethanol via hydrolysis and *** work provided an alternative that high purity cellulose derivatives and cellulose composites could be produced from the lignocellulose biomass.