Process for the production of a gasoline with a low sulfur content

A process for treating a gasoline comprising diolefins, olefins, and sulfur-containing compounds including mercaptans, consisting of a stage for treating gasoline in the presence of hydrogen in a distillation column (2) comprising at least one reaction zone (3) including at least one catalyst, with the catalyst being in sulfide form and comprising a substrate that consists of gamma-alumina or delta-alumina with a specific surface area of between 70 m2/g and 350 m2/g, a content by weight of oxide of the element of group VIb of between 1 and 30% by weight relative to the total weight of the catalyst, a content by weight of oxide of the element of group VIII of between 1 and 30% by weight relative to the total weight of the catalyst, a sulfurization rate of the metals that constitute said catalyst that is at least equal to 60%, a molar ratio between the metal of group VIII and the metal of group VIb of between 0.6 and 3 mol/mol, in which:

• gasoline is injected into the distillation column at a level located below the reaction zone (3) in such a way as to separate a desulfurized light gasoline at a point located above the reaction zone and a heavy gasoline comprising the majority of the sulfur-containing compounds at the bottom of the column, and
• concurrently the gasoline that distills at the top of the catalytic column is brought into contact with the catalyst of the reaction zone (3) and the hydrogen in such a way as to provide desulfurized light gasoline, and
• in which the distillation column is configured for operating as a depentanizer in such a way as to provide a light gasoline that has at most 5 carbon atoms or
• in which the distillation column is configured for operating as a dehexanizer in such a way as to provide a light gasoline that has at most 6 carbon atoms.