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| Analysis of the Organic Acids in the Waste-liquor of Aspen Auto-catalyzed Ethanol-water Pulping |
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| DOI： |
| Key Words:auto-catalyzed ethanol-water pulp; waste-liquor; organic acid; aspen |
| Fund Project:本课题为辽宁省教育厅创新团队资助项目（2007T007）。 |
| Author Name | Affiliation | | 安 洁 | 大连工业大学，辽宁大连，116034 | | 周景辉* | 大连工业大学，辽宁大连，116034 | | 孙广卫 | 大连工业大学，辽宁大连，116034 | | 赵长明 | 大连工业大学，辽宁大连，116034 |
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| Abstract: |
| 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. |
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