METHOD FOR PREPARING A GROUP VIII METAL CATALYST BY IMPREGNATION USING AT LEAST ONE ORGANIC ADDITIVE AND SELECTIVE HYDROGENATION METHOD IMPLEMENTING SAID CATALYST

摘要

The present invention relates to a process for preparing a selective hydrogenation catalyst, wherein the active phase comprises at least one substrate consisting of at least one Group VIII metal and at least one oxide, comprising: a) at least one precursor of the Group VIII metal And at least one step for preparing a solution containing at least one additive, the precursor and the additive being introduced at an additive / Group VIII metal molar ratio of no greater than 1.5 during the preparation of the solution; b) at least one step for impregnating the substrate with the solution prepared in step a); c) at least one step for drying the impregnated substrate obtained from step b); And d) at least one step for calcining the dried substrate obtained from step c) to obtain at least the Group VIII metal in oxide form. The present invention also relates to a hydrogenation process for impregnating the catalyst. The additive is an organic compound having 1 to 3 carboxylic acid functional groups, preferably carboxylic acids selected from glycine, aspartic acid, citric acid and tartaric acid. The catalyst obtained by the above detailed production process still has high activity and has improved catalytic performance.