Process for preparing precursors of catalysts containing copper, aluminum and zinc, usable for the synthesis and the decomposition of methanol and catalysts obtained from the precursors

摘要

The present invention relates to a process for preparing a precursor of a catalyst containing copper, aluminum and zinc.P PThis precursor is formed by the mixing of two ternary precursors, at different stages of their manufacturing, these two ternary precursors being different from one another in their metallic stoichiometry (atomic ratios between Cu, Zn and Al), in their crystalographic structure and in their elemental morphology.PPThe catalyst obtained from this precursor can be used in particular for the synthesis of methanol.