Abstract
Sequential extraction of four coal oxidation residues (COR) from aqueous NaOCl solution with petroleum ether (PE), carbon disulfide (CS2), acetone and methanol were investigated. The results suggest that methanol is an effective extraction solvent, giving the highest extraction yields for four COR. The extraction fractions were analyzed by GC/MS. It is found that no compounds, except for F1 of HL and XL , F2 of four COR, were detected. In total, 89 organic compounds were detected in F1 of HL and XL, 23 organic compounds in F2 from four COR. Most of which were arenes (As), normal alkanes (NAs) and oxygen-containing compounds (OCCs).
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