Method for hydrodesulfurization in the presence of a catalyst on a mesoporous-macroporous substrate

A process for hydrodesulfurization of an olefinic gasoline cut containing sulfur, wherein said olefinic gasoline cut, hydrogen and a catalyst are brought into contact, said hydrodesulfurization process being carried out at a temperature of between 200° C. and 400° C., a total pressure of between 1 and 3 MPa, an hourly space velocity, defined as being the volume flow rate of feedstock relative to the volume of catalyst, of between 1 and 10 h−1 and a hydrogen/olefinic gasoline cut volume ratio of between 100 and 600 N1/1, said catalyst comprising at least one group VIB metal, at least one group VIII metal, and a mesoporous and macroporous alumina support comprising a bimodal distribution of mesopores and wherein:

• the volume of mesopores with a diameter greater than or equal to 2 nm and less than 18 nm corresponds to between 10% and 30% by volume of the total pore volume of said mesoporous and macroporous alumina support;
• the volume of mesopores with a diameter greater than or equal to 18 nm and less than 50 nm corresponds to between 30% and 50% by volume of the total pore volume of said mesoporous and macroporous alumina support;
• the volume of macropores with a diameter greater than or equal to 50 nm and less than 8000 nm corresponds to between 30% and 50% by volume of the total pore volume of said mesoporous and macroporous alumina support.