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US 5,334,780 AGranted
Oxidation of hydrocarbons over ordered arrays of heteropolyacids and polyoxoanions on graphite
AssigneeSun Company, Inc.
InventorsShahid N. Shaikh, Paul E. Ellis, Jr., James E. Lyons
Life of this patent
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Abstract
Alkanes are catalytically oxidized using heteropolyacids (HPAs) or polyoxoanions (POAs) deposited on a graphite surface. The HPAs and POAs are framework-substituted with a different metal in place of a metal-oxygen unit.
Claims25
A method for oxidation of alkanes comprising contacting said hydrocarbon in the presence of oxidant with catalyst comprising (1) heteropolyacid having the formula:
- H.sub.e (X.sub.k M.sub.n M'.sub.z O.sub.y).sup.-e
- wherein X is one or more elements selected from a Group IIIB-VIB element;
- M is molybdenum, tungsten or vanadium or combinations thereof;
- M' is one or more atoms of chromium or other transition metal from Groups IVA, VA, VIIA, VIIIA, IB and IIB of the Periodic Table, substituted in the framework for one or more metal or metal-oxygen unit k is 1 to 5, z is 1 to 3, n is 5 to 20-z, y is 18 to 62, e is the change on the (X.sub.k M.sub.n M'.sub.z O.sub.y) group and the number of hydrogen atoms needed to balance the formula, M' is different from M, and each M' atom is bonded through oxygen to another M or M' atom;
- or (2) polyoxoanion thereof;
- wherein said heteropolyacid or polyoxoanion is deposited on a graphite surface.
3 more elements
Dependencies are inferred from the claim text.