Methanol synthesis catalyst based on copper, zinc and aluminum

摘要

1. Cu / Zn / Al catalyst precursor material comprising oxides or carbonates of copper, zinc and aluminum, wherein copper and zinc are contained together in a greater molar proportion than aluminum, and wherein the standard deviation of the local molar content of Al, measured by EDX (energy dispersive X-ray spectroscopy), do not exceed 50% .2. Cu / Zn / Al material of the catalyst precursor comprising the oxides and carbonates of copper, zinc and aluminum, wherein copper and zinc are together contained in a greater molar proportion than aluminum, and wherein the recovery of the precursor material in the presence of hydrogen leads to a catalyst material, wherein single crystalline copper particles partially incorporated into the continuous phase containing the oxides and carbonates of at least zinc and aluminum, said crystalline particles of copper have a lattice constant equal to 3,615 Å or more, preferably from 3,615 to 3,621 Å.3. Cu / Zn / Al catalyst precursor material according to Claim. 1 or 2, wherein the molar ratio of Cu and Zn is from 0.5 / 1 to less than 2.8 / 1, preferably from 2/1 to 2.7 / 1, and the aluminum content is 1 to 30 mol%, preferably 10 to 20 mol%, relative to all components metallov.4. Cu / Zn / Al material of the catalyst precursor according to Claim. 1 or 2, wherein the standard deviation of the local molar content of Zn, measured by EDX, does not exceed 40% and / or standard deviation of the local molar content of Cu, measured by EDX, does not exceed 25% .5. Cu / Zn / Al catalyst precursor material according to Claim. 1 or 2, wherein the degree of crystallinity, measured by HRTEM (transmission electron microscopy high res