Patent ID: 7288183
Filing Date: 2007-10-30
Classification: C10G

Abstract:
1. In a process for producing a low sulphur gasoline with a high octane number from an initial gasoline comprising olefins, aromatic and thiophene compounds, said process comprising the following steps: a) distilling the initial gasoline into at least two fractions, namely: b) eliminating the thiophene compounds contained in said fraction having an end point in the range about 70° C. to about 200° C. by adsorption onto a solid adsorbent, said adsorbent comprising at least one constituent from silicas, aluminas, zeolites, activated charcoal, resins, clays, metal oxides or reduced metals; said adsorbent having been pretreated to lower residual acidity: and c) treating said heavy fraction under hydrodesulphurization conditions; the improvement comprising monitoring the percentage of aromatic compounds in the first fraction in step (a) and conducting the distillation so that the percentage by weight of aromatic compounds in said first fraction is less than 25%.