Patent ID: 6350715
Filing Date: 2002-02-26
Classification: B01J,C07C

Abstract:
A process for preparing an activated catalyst composition which process comprises the sequential steps of(a) contacting a catalyst composition comprising a Group VII noble metal and a hydrocarbon-substituted aluminum compound on an alumina carrier containing up to 20 wt % of other components with an inert gas in the absence of hydrogen at a temperature above 400Â° C., wherein at least when the hydrocarbon-substituted aluminum compound is a non-halide hydrocarbon-substituted aluminum compound, the catalyst composition is contacted with a halogen-containing gas either prior to the treatment with the inert gas or during the treatment with the inert gas, and (b) cooling down to ambient temperature in an inert gas optionally containing hydrogen or containing, at a temperature below 400Â° C., a halogen-containing gas; or if a halogen-containing gas is present during the treatment with the inert gas, alternatively cooling down in a mixture of an inert gas, a halogen-containing gas, and, optionally, hydrogen.