PROCEDE DE PREPARATION D'UN CATALYSEUR SUPPORTE NI/SN POUR L'HYDROGENATION SELECTIVE D'HYDROCARBURES POLYINSATURES

On décrit un procédé de préparation d'un catalyseur comprenant au moins un support poreux et au moins une phase métallique contenant du nickel et de l'étain dans une proportion telle que le rapport molaire Sn/Ni est compris entre 0,01 et 0,2, ledit procédé comprenant au moins successivement les étapes suivantes : a) le dépôt de nickel sur au moins ledit support pour obtenir un catalyseur supporté monométallique à base de nickel, b) la réduction dudit catalyseur monométallique en présence d'au moins un gaz réducteur, c) le dépôt, en phase gazeuse et en présence d'au moins un gaz réducteur, d'au moins un composé organométallique de l'étain sur ledit catalyseur monométallique réduit et, d) l'activation du solide issu de ladite étape c) en présence d'au moins un gaz réducteur. Preparing a catalyst comprising at least one porous support and at least one metallic phase containing nickel and tin in a proportion such that the molar ratio of tin/nickel is 0.01-0.2, comprises: depositing nickel on the support to obtain a monometallic supported catalyst made of nickel; reducing the monometallic catalyst in the presence of at least one reducing gas; depositing, in gas phase and in the presence of the reducing gas, at least an organometallic compound of tin on the reduced monometallic catalyst; and activating the obtained solid in the presence of the reducing gas. Preparing a catalyst comprising at least one porous support and at least one metallic phase containing nickel (Ni) and tin (Sn) in a proportion such that the molar ratio of Sn/Ni is 0.01-0.2, comprises: (a) depositing nickel on the support to obtain a monometallic supported catalyst made of nickel; (b) reducing the monometallic catalyst in the presence of at least one reducing gas; (c) depositing, in gas phase and in the presence of the reducing gas, at least an organometallic compound of tin on the reduced monometallic catalyst; and (d) activating the solid resulting from the step (c) in the presence of the reducing gas to obtain a supported catalyst having a metallic phase based on nickel and tin in which tin is present at 0.02-15 wt.% and nickel is present at 1-50 wt.%. An independent claim is included for process for selective hydrogenation of polyunsaturated hydrocarbon charge comprising passing the charge on at least one reaction unit provided with the supported catalyst comprising the metallic phase.