Title: Separation and identification of organic compounds from thermally dissolved Shengli lignite in a methanol/benzene mixed solvent

Authors: Jun Zhou; Zhi-Min Zong; Xing Fan; Yun-Peng Zhao; Xian-Yong Wei

Addresses: Key Laboratory of Coal Processing and Efficient Utilization (Ministry of Education), China University of Mining & Technology, Xuzhou 221116, Jiangsu, China ' Key Laboratory of Coal Processing and Efficient Utilization (Ministry of Education), China University of Mining & Technology, Xuzhou 221116, Jiangsu, China ' Key Laboratory of Coal Processing and Efficient Utilization (Ministry of Education), China University of Mining & Technology, Xuzhou 221116, Jiangsu, China ' Key Laboratory of Coal Processing and Efficient Utilization (Ministry of Education), China University of Mining & Technology, Xuzhou 221116, Jiangsu, China ' Key Laboratory of Coal Processing and Efficient Utilization (Ministry of Education), China University of Mining & Technology, Xuzhou 221116, Jiangsu, China

Abstract: Thermal dissolution of Shengli lignite was conducted in a methanol/benzene mixed solvent at 240°C for 1 h. The soluble fraction was sequentially eluted with petroleum ether (PE) and carbon disulfide (CDS)/PE mixed solvents with increased CDS to PE ratio through a silica gel-packed column. A series of normal alkanes, polycyclic aromatics, methyl alkanoates, alkanoic acids, and fatty acid amides were enriched to large extents and 6-hydroxy-7-isopropyl-1,1,4a-trimethyl-2,3,4,4a,10, 10a-hexahydrophenanthren-9(1H)-one was successfully separated with high purity by the column chromatography. [Received: November 12 2012; Accepted: February 23, 2013].

Keywords: lignite; thermal dissolution; column chromatography; organic compounds; separation; identification; methanol; benzene; solvents.

DOI: 10.1504/IJOGCT.2013.056181

International Journal of Oil, Gas and Coal Technology, 2013 Vol.6 No.5, pp.517 - 527

Received: 13 Nov 2012
Accepted: 23 Feb 2013
Published online: 29 Jan 2014 *

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