麦秆中木质素的脱除  

Removal of lignin from wheat stalk

作　　者：赵炜[1] 李伟钢 刘浩淼 刘开帅 敖磊 方君基 关尹双 

机构地区：[1]中国矿业大学化工学院,江苏徐州221000

出　　处：《化工进展》2017年第B11期476-481,共6页Chemical Industry and Engineering Progress

基　　金：江苏省自然科学基金(BK20151140);徐州市科技(KC16SG245)项目

摘　　要：分别考察了酸处理、碱处理、氧化处理和超声辐射处理对从麦秆中脱除木质素的影响。酸处理能降低半纤维素含量;碱处理能够减少木质素含量;氧化处理能减少木质素及半纤维素含量;超声处理较好的分散麦秆并使之与溶剂充分接触,进而促进木质素的脱除。通过正交实验得到从麦秆中脱除木质素的优化条件为:碱性H_2O_2的乙醇混合溶液中NaOH浓度为1mol/L、H_2O_2体积分数为1.5%、双氧水与乙醇体积比1∶1,麦秆超声预处理5min,麦秆用量为2.5g,固液比1∶20;麦秆和混合溶液超声处理5min,然后在80℃下处理3h。在此条件下,木质素脱除率可达到88%。The effects of acid treatment, base treatment, oxidation treatment and ultrasonicirradiation on the removal of lignin from wheat stalk powder （WSP） were investigated.Hemicellulose content is decreased by acid treatment and lignin content is decreased by basetreatment. Hemicellulose and lignin are decreased by oxidation treatment. Ultrasonic treatmentcan effectively disperse WSP and make it full contact with the solvent, thereby promoting theremoval of lignin. The treatment process of WSP was optimized by orthogonal experiment inorder to remove lignin from WSP. The optimum conditions of treatment are that theconeentrations of NaOH and H202 in alkaline and H202 mixed solution are lmol/L and 1.5GH202, the ratio of alkaline H202 to ethanol is 1 ： 1, and that 5g of WSP is pretreated underultrasonic irradiation for about 5rain, mixed with a mixing solution of about 20times, and thentreated under ultrasonic irradiation for 5min, and then treated at a temperature of 80℃ for 3h.Under these conditions, the removal rate of lignin from WSP reaches 88 %.

关 键 词：麦秆 木质素 双氧水 超声辐射 

分 类 号：TQ352.4[化学工程]