Process for the preparation of a Group VIII metal-based catalyst prepared with at least one organic additive, and a selective hydrogenation process using said catalyst

摘要

A method for preparing a selective hydrogenation catalyst is described, wherein the active phase comprises at least one Group VIII metal and at least one support formed by at least one oxide. The method comprises: a) at least one step of preparing a solution comprising at least one precursor of the Group VIII metal and at least one additive, the precursor and the additive Is introduced at an additive / Group VIII metal molar ratio of 1.5 or less throughout the preparation of the solution; step b) impregnating the solution prepared in step a) onto the support, at least 1 C) drying the impregnated support from step b), at least one step; and d) calcining the dried support from step c), from said group VIII At least before Metal obtained in the oxide form, contains at least one step.