Conversion of alkanes to unsaturated carboxylic acids
AssigneeSun Company, Inc. (R&M)
InventorsJames E. Lyons, Paul E. Ellis, Jr., Swati Karmakar, Shahid N. Shaikh
Life of this patent
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Abstract
Alkanes are converted to unsaturated carboxylic acids by contacting an alkane with an oxidizing agent and a heteropolyacid or polyoxoanion comprising (1) at least 9 atoms of a first framework metal or metals comprising molybdenum, tungsten or vanadium or combinations thereof and (2) 1 to 3 atoms of a second framework metal or metals comprising zinc or a transition metal different from the first framework metal.
Claims56
A process for the conversion of alkanes to unsaturated carboxylic acids which comprises contacting an alkane with an oxidizing agent and a heteropolyacid comprising:
- (1) at least 9 atoms of a first framework metal or metals comprising molybdenum, tungsten, or vanadium or combinations thereof, and
- (2) at least one atom of a second framework metal or metals comprising independently a metal, is selected from the group consisting of chromium, manganese, rhenium, iron, cobalt, nickel, ruthenium, rhodium, palladium, osmium, iridium, platinum, copper and zinc, or combination thereof;
- or polyoxoanion of said heteropolyacid.
A process for the conversion of alkanes to unsaturated carboxylic acids which comprises contacting an alkane with oxidizing agent and a heteropolyacid having the formula H.sub.e (X.sub.k M.sub.m M'.sub.n O.sub.y).sup.-e, where X is a Group IIIB, IVB, VB, VIB or transition element;
- M is independently molybdenum, tungsten, vanadium or combination thereof;
- M' is independently zinc or a transition metal or combination thereof, wherein M' is different from M, and each M' is bonded through an oxygen atom to another M' atom;
- k is 1 to 5, n is 2 to 3, m is 5 to 17, and y is 18 to 59;
- or a polyoxoanion of said heteropolyacid.
A process for the conversion of alkanes to unsaturated carboxylic acids which comprises contacting an alkane with an oxidizing agent and a heteropolyacid having the formula H.sub.e (X.sub.k M.sub.m M'.sub.3 O.sub.y).sup.-e, where X is a Group IIIB, IVB, VB, VIB or transition element;
- M is independently molybdenum, tungsten, vanadium or combination thereof;
- M' is independently zinc or a transition metal different from M or combination thereof;
- k is 1 to 5, m is 5 to 17, and y is 18 to 59;
- or a polyoxoanion of said heteropolyacid.
A process for oxidizing light alkanes to unsaturated carboxylic acids which comprises contacting an alkane with an oxidizing agent and a heteropolyacid having the formula H.sub.e (X.sub.k M.sub.m M'.sub.n O.sub.y).sup.-e, where X is a Group IIIB, IVB, VB, VIB or transition element;
- M is independently molybdenum, tungsten, vanadium or combination thereof;
- M' is independently a metal selected from the group consisting of chromium, manganese, rhenium, iron, cobalt, nickel, ruthenium, rhodium, palladium, osmium, iridium, platinum, copper and zinc;
- k is 1 to 5, n is 1 to 3, n is 5 to 17, and y is 18 to 59;
- or a polyoxoanion of said heteropolyacid.
Dependencies are inferred from the claim text.