METHOD FOR PREPARING A MULTI-METAL CATALYST HAVING AN OPTIMIZED SITE PROXIMITY

摘要

The invention relates to a method for preparing a catalyst including at least one metal M of the platinum group, tin, a phosphorus promoter, a halide compound, a porous substrate, and at least one promoter X1 selected from the group comprising gallium, indium, thallium, arsenic, antimony and bismuth. The X1 promoter(s) and the phosphorus are added during one or more sub-steps a1) or a2), the sub-step a1) corresponding to the synthesis of the precursor of the dominant oxide and the sub-step a2) corresponding to the shaping of the substrate. The tin is added during one at least of the sub-steps a1) and a2). The product is dried and calcinated before depositing at least one metal M of the platinum group. The assembly is then dried under a neutral gas flow or an oxygen-containing gas flow and further calcinated. The invention also relates to the use of the catalyst obtained by said method in catalytic-reforming or aromatic production reactions.