| 摘要 |
<p>The present invention relates to a process for treating a petrol comprising diolefins, olefins and sulphur-containing compounds including mercaptans, in which: - the petrol is injected into a distillation column (3) comprising at least one reaction zone (4) including at least one first catalyst comprising a support and at least one element of group VIII, the injection being carried out at a level located below the reaction zone (4), so as to bring at least one fraction of the petrol into contact with the catalyst of the reaction zone (4) and to produce a desulphurized light petrol which is drawn off at the top of said distillation column (3); the process also comprising the following steps: - an intermediate petrol fraction is drawn off at a level located above the reaction zone (4) and below the top of the distillation column (3); - a heavy petrol comprising the majority of the sulphur-containing compounds is drawn off at the bottom of the column - said intermediate petrol fraction is brought into contact, in a demercaptanization reactor (13), with optionally hydrogen, in the presence of a second catalyst, in sulphide form, so as to produce an effluent containing sulphides; - the effluent from the demercaptanization reactor is recycled to the distillation column (3).</p> |
