โ Scribed by M.Karen Marsh; Cathryn A. Smith; Colin E. Snape; Brian J. Stokes
No coin nor oath required. For personal study only.
An alumina adsorption chromatographic method for separating aromatic species in petroleum heavy ends into mono-(single ring), di-(two rings) and poly-aromatic (3 3 rings) compounds has been modified to improve the separation of coal-derived oils (boiling point range cu. 250450ยฐC). The overlap of the different aromatic species that occurs for coal-derived oils has been reduced by lowering the polarity of the eluents used. The fractionation thus achieved aids the characterization of coal-derived oils by gas chromatographic-mass spectrometric and nuclear magnetic resonance methods.
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Yubarishinko coal-derived neutral oil was separated into compound class fractions, alkanes (Fr-P), monoaromatics (Fr-M), diaromatics (Fr-D) and tri-and/or tetra-aromatics (Fr-T), by high performance liquid chromatography (h.p.1.c.). The compound type analyses of aromatic compound class fractions wer
15 Environment (pollution, health protection, safety) nantly present as Cl-. Their evaporation was completed by shifting the oxide/chloride equilibrium if surplus Cl was available. Reactions of heavy metal silica/alumina compounds probably limited heavy metal evaporation. gal01 599 ## Control of ga