Title: Enrichment of oxygen-containing aromatics in an extract from Zhundong subbituminous coal

Authors: Yin Zhou; Zhi-Min Zong; Yun-Peng Zhao; Xing-Shun Cong; Xing Fan; You-Quan Dou; Xiu-Hua Sun; 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 ' 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: Zhundong subbituminous coal (ZSBC) was exhaustively extracted with isometric carbon disulfide (CDS)/acetone mixed solvent to afford extract 1 (E₁), which was sequentially extracted with petroleum ether (PE) and CDS to afford extracts 2 (E₂) and 3 (E₃). E₃ was gradiently eluted into effluent portions 1 to 5 (EPs 1 to 5) through a silica gel-packed column sequentially with PE, CDS/PE mixed solvents with volume ratio of 3:7, 1:1 and 7:3, and CDS. According to analysis with a gas chromatography/mass spectrometer, in total, 22 alkyl phenyl carbonates were enriched into EP₃, and anthraquinone and its two derivatives, nine polycyclic aromatic ketones and two polycyclic aromatic lactones into EP₄. Most of the oxygen-containing aromatics are value-added chemicals. [Received: March 20, 2013; Accepted: September 17, 2013]

Keywords: subbituminous coal; fractional extraction; gradient elution; oxygen-containing aromatics; OCAs; China; value-added chemicals.

DOI: 10.1504/IJOGCT.2014.065814

International Journal of Oil, Gas and Coal Technology, 2014 Vol.8 No.3, pp.325 - 335

Received: 08 Mar 2013
Accepted: 17 Sep 2013
Published online: 29 Nov 2014 *

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