Abstract ScCO2/ethanol-water was used to extract lignin from corn stover. Lignin product was obtained from the extraction by precipitation. The composition of the extract and the structure of the extracted lignin product were analyzed using GC-MS, FTIR and UV. Thermogravimetric analysis was conducted to study the thermal stability of extracted lignin. The results showed that the extracted lignin appeared to show the typical lignin structures and to decompose mostly between 180 �� and 500 ��. The three dimension supramolecular structure of lignin was greatly broken down, primarily through the cleavage of ether linkages. The internal bonds of lignin-hemicellulose were not hydrolyzed completely, which leading to the extracted lignin containing a certain amount of carbohydrate.
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Cite this article:
REN Miao-Miao, ��Hui-Sheng , ZHANG Min-Hua.Supercritical Extraction and Characterization of Corn Stover Lignin[J] Chemcial Industry and Engineering, 2012,V29(5): 53-57
2012, Vol. 29 
