杨木自催化乙醇制浆废液中有机酸的分析  

Analysis of the Organic Acids in the Waste-liquor of Aspen Auto-catalyzed Ethanol-water Pulping

作　　者：安洁[1] 周景辉[1] 孙广卫[1] 赵长明[1] 

机构地区：[1]大连工业大学,辽宁大连116034

出　　处：《中国造纸学报》2011年第1期41-45,共5页Transactions of China Pulp and Paper

基　　金：辽宁省教育厅创新团队资助项目(2007T007)

摘　　要：针对杨木自催化乙醇法蒸煮废液成分复杂、副产物价值高等特点,对废液中的有机酸进行分析。首先制取杨木自催化乙醇制浆废液,对分离出木素的废液用乙醚萃取,将萃取物用气相色谱-质谱联用检测仪进行定性分析。结果表明,废液中的各成分复杂而且都很微量,主要是一些酸、酯、低分子木素等,约25种,其中乙酸和甲酸含量较高。其次对杨木自催化乙醇法蒸煮废液减压蒸馏至无液体来分离木素,对全部馏分采用容量分析的方法测得总酸含量为0.043 mol/L,同时用气相色谱定量测得乙酸含量为1.864 g/L、甲酸含量为0.665 g/L。The organic acids in the waste-liquor of aspen auto-catalyzed ethanol-water pulping were analyzed. The lignin was separated and extracted by ether. The ether extract was qualitatively analyzed by GC-MS. Results showed that there were almost 25 kinds of complex components in the waste-liquor such as acids, esters and low molecular weight lignin, the contents of acetic acid and formic acid were higher comparatively. Vacuum distillation was also used to separate lignin from the waste-liquor. All the fractions were analyzed by volumetric analysis and GC as well. It revealed that the total acid content was 0. 043 mol/L. Furthermore the acetic acid and formic acid were about 1. 864 g/L and 0. 665 g/L respectively by the analysis of GC.

关 键 词：自催化乙醇制浆 废液 有机酸 杨木 

分 类 号：X793[环境科学与工程—环境工程]