CATALYSTS CONTAINING IRON AND MOLYBDENUM AND THE USE OF THESE CATALYSTS IN THE PREPARATION OF ACRYLONITRILE OR METHACRYLONITRILE

摘要

The invention is related to new catalysts containing iron, bismuth, molybdenum and various additional elements which exhibit extremely attractive catalytic properties for the oxidation and ammoxidation of various olefins. The invention is further related to the use of such catalysts in the ammoxidation of propylene and isobutylene to acrylonitrile and respectively, methacrylonitrile.