Patent ID: 7919428
Filing Date: 2011-04-05
Classification: B01J,C01G,C01P,C07C,Y02P

Abstract:
1. A method for preparing a mixed oxide catalyst for use in producing acrylonitrile or methacrylonitrile from propane or isobutene by ammoxidation in a gaseous phase comprising the elements molybdenum (Mo), vanadium (V), niobium (Nb), oxygen (O) and at least one element selected from the group consisting of antimony (Sb) and tellurium (Te), said method comprising heating a precursor solid mixture of said mixed oxide catalyst comprising compounds of molybdenum (Mo), vanadium (V) niobium (Nb), oxygen (O) and at least one element selected from the group consisting of antimony (Sb) and tellurium (Te), in contact with flowing gas, at a first heating rate greater than about 15° C./min until the precursor solid mixture attains a precalcination temperature of not greater than 400° C.