林产化学与工业2017，Vol.37Issue(5)：45-52,8.DOI:10.3969/j.issn.0253-2417.2017.05.006
疏水性离子液体[C4 mim][PF6]对木质纤维 预水解液的脱毒作用
Detoxification of Lignocellulosic Prehydrolyzate by Hydrophobic Ionic Liquid [ C4 mim] [ PF6 ]
摘要
Abstract
In this study , a new green detoxification technology named-ionic liquid extraction was used for detoxification of the prehydrolyzate obtained from the washed acid-catalyzed steam-exploded corn stover in order to improve the ethanol fermentability of yeast.1-butyl-3-methyl imidazole hexafluorophosphate ([ C4 mim] [ PF6 ]) was selected as the extraction agent and its extraction conditions had been optimized .The optimal extraction conditions were as follows:the ratio of aqueous to organic phase 1:2, 35 ℃, 250 r/min, and 60 min.Under these conditions , the removal rate of formic acid , acetic acid, levulinic acid, 5-hydroxymethylfurfural , furfural and total phenols in the hydrolysate reached 24.72%, 21.84%, 47.99%, 82.76%, 100%and 39.7%respectively , the extraction efficiencies of the main inhibitors were high and the loss of sugars was negligible .The results of detoxification mechanism indicated that the extraction efficiency of the inhibitors decreased with the increase of alkyl chain length on the cation of ionic liquid[Cnmim][PF6](n=4, 6, 8);the more hydrophobic the inhibitors were, the stronger the hydrogen bonding with ionic liquid was;the lower the pH value was , the better the extraction efficiency of inhibitors was .The removal rate of acetic acid , 5-hydroxymethylfurfural and 4-hydroxybenzaldehyde in [ C4 mim] [ PF6 ] did not change with the initial mass concentration of inhibitors .关键词
木质纤维原料/抑制物/离子液体/萃取/脱毒Key words
lignocellulose/inhibitor/ionic liquid/extraction/detoxification分类
化学化工引用本文复制引用
程逸超,杨金龙,朱均均,徐勇,勇强,余世袁..疏水性离子液体[C4 mim][PF6]对木质纤维 预水解液的脱毒作用[J].林产化学与工业,2017,37(5):45-52,8.基金项目
"十二五"国家科技支撑计划资助(2015BAD15B09) （2015BAD15B09）
江苏省普通高校研究生科研创新计划资助项目(SJLX_0406) （SJLX_0406）
江苏高校优势学科建设工程资助项目(无编号) （无编号）
