Patent ID: 7595277
Filing Date: 2009-09-29
Classification: B01J,C07C,Y02P

Abstract:
1. A catalyst for use in catalytic oxidation or ammoxidation of propane or isobutane in the gaseous phase, which comprises an oxide and a silica carrier having supported thereon said oxide, wherein said silica carrier is present in an amount of from 20 to 60% by weight in terms of SiO 2 , based on the total weight of said oxide and said silica carrier, said oxide being represented by the following formula (1): wherein: a, b, c and n are, respectively, the atomic ratios of vanadium (V), niobium (Nb), antimony (Sb) and oxygen (O), relative to molybdenum (Mo), wherein:  n is the number of oxygen atoms required to satisfy the valence requirements of the other component elements present, said catalyst having a reduction ratio of from 8 to 12% and a specific surface area of from 7 to 30 m said reduction ratio being represented by the following formula (2): wherein: n is as defined for formula (1), and n