Abstract
Gel permeation chromatography (GPC) was used to separates the components of Gach Saran residue and. its hydrodesulfurized residue. GPC separation was made with a cross-linked polystyrene gel, using benzene as a solvent. The fractions obtained were separated further by silicagel adsorption chromatography into four generic components. The method involves solvent deasphaltening for recovery of asphaltenes, followed by elution chromatography to yield saturates, naphthene-aromatics, aromatics and polar-aromatics. Gel permeation chromato- graphy results offer challenging opportunities to gain an insight into the chemical mechanisms resulting in hydrodesulfurization.
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