Patent ID: 6399816
Filing Date: 2002-06-04
Classification: B01J,C07C

Abstract:
A process for the selective preparation of acetic acid from a gaseous feed comprising ethane, or mixtures of ethane and ethylene thereof plus oxygen at elevated temperature, which comprises bringing the gaseous feed into contact with a catalyst comprising the elements Mo, Pd, X and Y in the gram atom ratios a:b:c:d in Combination with oxygenMoaPdbXcYdâ€ƒâ€ƒ(I) where the symbols X and Y have the following meanings:X is one or more elements selected from the group consisting of Nb, Ta, V, Te and W; Y is one or more elements selected from the group consisting of Bi, Cu, Ag, Au, Li, K, Rb, Cs, Mg, Ca, Sr, Ba, Nb, Zr, Hf and Sb; the indices a, b, c, d and x are the gram atom ratios of the corresponding elements, where a=1; b=0.0001-0.01; c=0.4-1; and d=0.005-1 and the space-time yield in the oxidation to acetic acid is>150 kg/hm3, with the proviso that Mo and the elements X do not derive from a hetero-poly-acid.