Method for capturing organometallic impurities in the presence of a capture mass on a mesoporous-macroporous support

A process for capturing organometallic impurities in a gasoline-type hydrocarbon feedstock containing sulfur compounds and olefins, comprising:

• bringing a capture mass into contact with a feedstock to be treated and a flow of hydrogen at a temperature between 200 and 400° C., a pressure of between 0.2 and 5 MPa and a ratio of the hydrogen flow rate to the hydrocarbon feedstock flow rate of between 50 and 800 Nm3/m3,
• said capture mass comprising an active phase based on nickel, and a support of mesoporous and macroporous alumina comprising a bimodal distribution of mesopores, and in which:
• the volume of the 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 support;
• the volume of the mesopores with a diameter greater than or equal to 18 nm and less than nm corresponds to between 30 and 50% by volume of the total pore volume of said support;
• the volume of the 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 support.