乙醇法制浆废液及木素回收工艺研究  

RECOVERY CHEMICALS AND LIGNIN IN BLACK LIQUOR FROM ETHANOL PULPING

作　　者：徐永建[1] 付旭东[2] 李龙[1] 

机构地区：[1]陕西科技大学造纸工程学院,陕西省造纸技术与特种纸品开发重点实验室,陕西西安710021 [2]陕西科技大学化学与化工学院,教育部轻化工助剂化学与技术重点试验室,陕西西安710021

出　　处：《陕西科技大学学报（自然科学版）》2010年第3期51-54,共4页Journal of Shaanxi University of Science & Technology

基　　金：陕西省外专局项目"玉米秸杆高值化利用技术(20106100067)";陕西省"13115"工程重大科技专项"秸杆无污染分解高值化利用技术(2008ZDKG-43)"

摘　　要：以麦草自催化乙醇法蒸煮废液和洗涤废液为研究对象,初步研究了乙醇、糠醛及木素的回收工艺,考察了实验馏分、酒精度、pH值、能耗等影响因素,得出蒸馏乙醇最佳温度为80℃.实验发现:乙醇回收,以蒸馏为主,蒸馏回收的乙醇能够满足循环使用对乙醇浓度的要求,也可作为热置换洗涤液;保温60min,废液中的木素含量达到饱和;废液中木素含量对回收乙醇没有明显影响;随着蒸发时间的延长,蒸煮废液中糖类物质浓度增大,糠醛含量上升,90min后,糠醛含量趋于稳定.With wheat straw pulping from the auto-catalytic ethanol and waste liquid as the research object, preliminary studied on recovery process of ethanol, furfural and lignin. The factors be discussed,such as experimental fraction, liquor precision, pH value, energy consumption, then the temperature of ethanol distillation was obtained： 80 ℃; it was found that the ethanol was recycled, with distilling primarily, it can satisfy the request of ethanol density to use circulating, also taked it as hot replacement cleaning liquid; lignin content in the waste liquid saturated;the content of lignin had no obvious effect on the recovery process of ethanol, and discussed the recycling technology of lignin; along with the evaporation time, the carbohydrate in boiling waste liquid increased, the furfural content rised and tended to stably after 90 min.

关 键 词：麦草浆 自催化乙醇法 制浆废液 木素 

分 类 号：TS743.9[轻工技术与工程—制浆造纸工程]