Supported molybdenum or tungsten oxides treated with organoaluminum compounds as catalysts

摘要

Catalysts active for the olefin reaction, including olefin disproportionation are provided comprising molybdenum or tungsten oxides associated with a suitable support material which has been subjected to treatment at high temperature in combination with organoaluminum compounds. The supported molybdenum or tungsten oxide can optionally be contacted with nitric oxide, nitrosyl halide, and alkali or alkaline earth metal compounds prior to treatment with the organoaluminum compound.