Patent ID: 11890594
Assignee: UOP LLC
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  Y | IPC B  C

Claim 0:
1. A mixed-metal oxide catalyst for the oxidative dehydrogenation of ethane to ethylene, the catalyst prepared by the method comprising:
(a) preparing a catalyst precursor comprising molybdenum, vanadium, at least one of niobium or tantalum, and at least one of tellurium or antimony;
(b) pressing the catalyst precursor into a dense pellet using a pressure of greater than about 5,000 psi;
(c) annealing the dense pellet at a temperature of from about 525° C. to about 700° C. in a non-oxidative environment for a period of from about 0.5 hours to about 24 hours to form the mixed-metal oxide catalyst; and
(d) optionally grinding the mixed-metal oxide catalyst into a fine powder and repeating steps (b) and (c),
wherein after annealing of the dense pellet in step (c), the mixed-metal oxide catalyst is characterized by a local distribution of elements comprising of a standard deviation in molybdenum decreasing in a range of σMo=9.5 wt % to σMo<3.2 wt %, and a standard deviation in vanadium decreasing in a range of σv=3.3 wt % to a σv<0.9 wt %.