摘要 |
The present invention relates to a process for the production of an olefin, said process comprising passing a mixture of a hydrocarbon and an oxygen-containing gas through a catalyst zone which is capable of supporting combustion beyond the fuel rich limit of flammability to produce said olefin, said catalyst zone comprising at least a first catalyst bed and a second catalyst bed, and wherein the second catalyst bed is located downstream of the first catalyst bed, is of a different composition to the first catalyst bed and has the general formula of: M<SUP>1</SUP><SUB>a</SUB>M<SUP>2</SUP><SUB>b</SUB>M<SUP>3</SUP><SUB>c</SUB>O<SUB>z </SUB>wherein M<SUP>1 </SUP>is selected from groups IIA, JIB, IIIB, IVB, VB, VIIB, VIIB, lanthanides and actinides, M<SUP>2 </SUP>is selected from groups IIA, IB, JIB, IIIB, IVB, VB, VIB, and M<SUP>3 </SUP>is selected from groups IIA, IB, IIB, IIIB, IVB, VB, VIB and VIIIB. |