Patent ID: 8652994
Filing Date: 2014-02-18
Classification: B01J

Abstract:
1. A process for preparing in situ a supported noble metal catalyst having a composition represented by the general formula: wherein Me is a noble metal as the active component of the catalyst, and is Ru, Rh, Pd or Pt, the noble metal element particle in the catalyst has a particle size of 10 to 60 nm, with an even and stable dispersion on or between slabs of hydrotalcite (LDHs), and the hydrotalcite is grown in situ on the surface of an Al A) dissolving a soluble noble metal salt precursor in a solvent to prepare a noble metal salt solution with a concentration of 0.004 to 0.01 mol/L, wherein the anion in the solution is NO B) dissolving a soluble divalent metal salt in deionized water to prepare a divalent metal salt solution in a concentration of 0.02 to 0.08 mol/L, wherein the divalent metal M C) adding hexamethylenetetramine to the divalent metal salt solution prepared in the step B), and stirring to reach a sufficient dissolution while the temperature of the solution is maintained at 0 to 10° C., followed by adding thereto the noble metal salt solution prepared in the step A) and stirring well to obtain a mixed solution, wherein the molar ratio of M D) adding the Al