蒸馏回收杨木自催化乙醇法蒸煮废液中乙醇溶液  

Ethanol recovery from auto-catalyzed ethanol pulping of aspen by distillation

作　　者：崔鑫[1] 周景辉[1] 

机构地区：[1]大连工业大学化工与材料学院,辽宁大连116034

出　　处：《大连工业大学学报》2008年第1期41-44,共4页Journal of Dalian Polytechnic University

基　　金：辽宁省教育厅重点实验室项目(20060157)

摘　　要：采用蒸馏法分离回收杨木自催化乙醇法蒸煮废液中的乙醇溶液,分析了蒸馏过程中的浓缩体积比对乙醇回收和对后续膜处理的影响,确定了最佳浓缩体积比。实验结果表明:蒸馏过程的最佳浓缩体积比应为0.6,在此浓缩体积比下可回收得到体积分数21.61%的乙醇溶液;调节蒸馏浓缩液的pH 1.44,然后经滤纸过滤,可回收废液中90%的木素,木素等组分的去除使得废液的污染程度大大降低,COD去除率接近80%,相对黏度降到39%,有利于后续处理。Ethanol was recovered from the waste of auto-catalyzed ethanol pulping of aspen by distillation. The effect of concentrated ratio on ethanol recovery and membrane filtration was discussed. The optimal concentrated ratio was 0.6 in which 21.6% ethanol was recovered. When adjusting pH to 1.44 and filtrating 90 % lignin in the waste was obtained. Removal rate of COD was nearly 80 % and relative viscosity was reduced to 0.39, which was helpful to the follow-up treatment.

关 键 词：蒸馏 回收 自催化乙醇法 乙醇 木素 

分 类 号：X793[环境科学与工程—环境工程]