Selective hydrogenation process using a nickel catalyst prepared with an additive containing an amine or amide function or an amino acid

A process comprising selective hydrogenation of polyunsaturated compounds containing at least 2 carbon atoms per molecule, contained in a hydrocarbon feed that is a C2 cut from steam cracking, a C2-C3 cut from steam cracking, a C3 cut from steam cracking, a C4 cut from steam cracking, a C5 cut from steam cracking or gasolines from steam cracking, with a final boiling point of 300° C. or less, said process being carried out at a temperature in the range 0° C. to 300° C., at a pressure in the range 0.1 to 10 MPa, in liquid phase at a molar ratio of hydrogen/(polyunsaturated compounds to be hydrogenated) in the range 0.1 to 10 and at an hourly space velocity in the range 0.1 to 200 h−1, or in gas phase at a molar ratio of hydrogen/(polyunsaturated compounds to be hydrogenated) in the range 0.5 to 1000 and at an hourly space velocity in the range 100 to 40000 h−1, in the presence of a catalyst comprising a support formed from alumina and an active phase constituted by nickel, said catalyst being prepared by a process comprising at least:

• i) bringing said support into contact with at least one solution containing at least one precursor of nickel;
• ii) bringing said support into contact with at least one solution containing at least one organic compound having 1 to 20 carbon atoms and at least one amine function with the empirical formula CxNyHz in which 1≤x≤20, 1≤y≤x, 2≤z≤2x+2, or at least one amide function, or at least one amino acid, to produce an impregnated support,
• iii) drying said impregnated support at a temperature of less than 250° C. so as to obtain a dried catalyst comprising nickel in the form of nanoparticles measured, in oxide form, of 1.5 to 10.0 nm;
• i) and ii) being carried out separately, in any order, or simultaneously.