Abstract
A rapid method for the isolation of sulphur heterocycles (PASH) from the aromatic fraction of complex mixtures is described, based on ligand exchange column chromatography using silica gel impregnated with palladium chloride. The application of the procedure to a coal liquid and petroleum heavy ends yielded sulphur fractions composed of PASH having two to six aromatic rings. The fractions were examined by capillary column gas chromatography with flame ionization and flame photometric detection, and by gas chromatography-mass spectrometry.
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