Patent ID: 7731836

Claim:
A process for the production of a desulfurized gasoline with a high octane number from a starting gasoline that comprises olefins and thiophenic compounds, said process comprising: a) distilling the starting gasoline into at least two fractions including: a light fraction containing a majority of olefins with 5 and 6 carbon atoms, as well as thiophene, having a final boiling point of 90 to 160° C., a heavy fraction that no longer contains olefins with 5 carbon atoms and concentrates heavy sulfur-containing compounds, having a final boiling point up to 300° C., b) desulfurizing said light fraction by adsorption of the sulfur-containing compounds on an adsorbent solid, whereby the adsorbent solid that is used is silicas, aluminas, zeolites, active carbons, resins, clays, metal oxides or reduced metals, c) hydrodesulfurizing of said heavy fraction on a catalyst that contains at least one metal of group VIII and a metal of group VIb, under standard hydrodesulfurization conditions, and regenerating the adsorbent solid at a temperature of greater than 50° C., while remaining in liquid phase with a desorption solvent that is a portion of the effluent of the hydrodesulfurization stage of the heavy fraction, recycling to hydrodesulfurization in (c) regeneration effluent containing sulfur-containing molecules initially retained on the adsorbent solid and mixing an additional portion of the effluent of said hydrodesulfurization stage with the effluent of the desulfurization (b) to constitute the desulfurized gasoline with a high octane number.