Title: Enrichment of condensed arenes and dialkyl phthalates in the extracts from Geting bituminous coal

Authors: Da-Ling Shi; Xian-Yong Wei; Bo Chen; Zhi-Min Zong

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

Abstract: Geting bituminous coal was fractionated into extracts 1-5 (E₁-E₅) and residue by sequential extraction with petroleum ether, carbon disulfide (CDS), methanol, acetone, and isometric CDS/acetone mixed solvent at room temperature. According to analysis with a gas chromatograph/mass spectrometer, condensed arenes (CAs) and dialkyl phthalates (DAPs) were enriched into E₂ and E₄, respectively. The CAs and DAPs were further enriched by gradient elution in a medium-pressure preparative liquid chromatography. As a result, 3 CAs and 4 DAPs were successfully isolated in high purities. [Received: April 27, 2013; Accepted: April 2, 2014]

Keywords: fractional extraction; medium-pressure preparative liquid chromatography; MPLC; condensed arenes; dialkyl phthalates; DAPs; enrichment; bituminous coal; petroleum ether; carbon disulfide; CDS; methanol; acetone.

DOI: 10.1504/IJOGCT.2016.074283

International Journal of Oil, Gas and Coal Technology, 2016 Vol.11 No.2, pp.180 - 192

Received: 27 Apr 2013
Accepted: 02 Apr 2014
Published online: 21 Jan 2016 *

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