Journal
INTERNATIONAL JOURNAL OF OIL GAS AND COAL TECHNOLOGY
Volume 8, Issue 3, Pages 325-335Publisher
INDERSCIENCE ENTERPRISES LTD
DOI: 10.1504/IJOGCT.2014.065814
Keywords
subbituminous coal; fractional extraction; gradient elution; oxygen-containing aromatics; OCAs
Funding
- National Basic Research Program of China [2011CB201302]
- Key Project of Natural Science Foundation of China [20936007]
- Natural Science Foundation of China for Innovative Research Group [51221462]
- National Natural Science Foundation of China [51074153, 21206187, 21206188]
- Strategic Chinese-Japanese Joint Research Program [2013DFG60060]
- China Postdoctoral Science Foundation [2012M511339, 2012T50501]
- Fundamental Research Funds for the Doctoral Program of Higher Education [20120095110006]
- Central Universities (China University of Mining Technology) [2010LKHX09, 2011QNA23]
- Development and Guide Plan of Guangdong Province's New Hi-Tech District [2011B010700058]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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Zhundong subbituminous coal (ZSBC) was exhaustively extracted with isometric carbon disulfide (CDS)/acetone mixed solvent to afford extract 1 (E-1), which was sequentially extracted with petroleum ether (PE) and CDS to afford extracts 2 (E-2) and 3 (E-3). E-3 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.
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