Cerium (IV) catalyst compounds and promoting combustion of hydrocarbon fuels therewith
First Claim
1. A cerium (IV) oxidic compound having the formula:
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space="preserve" listing-type="equation">(H.sub.2 O).sub.p [CeO(A).sub.2 ·
(AH).sub.n ·
].sub.min which the radicals A, which are identical or different, are each an anion of an organic oxyacid of formula AH having a pKa greater than 1, p is an integer ranging from 0 to 5, n is a number ranging from 0 to 2, and m is an integer ranging from 1 to 12.
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Abstract
Novel cerium (IV) oxidic compounds, well suited as catalysts, e.g., for the clean combustion of hydrocarbon fuels and for the "drying" of paint compositions, each Ce(IV) atom of which being coordinated with two anions of an organic oxyacid advantageously having a pKa greater than 1, preferably greater than 2, or a mixture of such oxyacids, and the oxidic oxygen atom or atoms of which being other than those comprising the organic oxyacids; representative such novel cerium (IV) oxidic compounds, whether yellow crystalline solids or yellow liquids, have the formula:
(H.sub.2 O).sub.p [CeO(A).sub.2 ·(AH).sub.n ·].sub.m
in which the radicals A, which may be the same or different, are each the residue of an organic oxyacid of formula AH, p is an integer ranging from 0 to 5, n ranges from 0 to 2 and m is an integer ranging from 1 to 12.
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Citations
28 Claims
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1. A cerium (IV) oxidic compound having the formula:
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space="preserve" listing-type="equation">(H.sub.2 O).sub.p [CeO(A).sub.2 ·
(AH).sub.n ·
].sub.min which the radicals A, which are identical or different, are each an anion of an organic oxyacid of formula AH having a pKa greater than 1, p is an integer ranging from 0 to 5, n is a number ranging from 0 to 2, and m is an integer ranging from 1 to 12. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A cerium (IV) oxidic compound having the formula:
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space="preserve" listing-type="equation">H.sub.6 Ce.sub.6 O.sub.8 (OH).sub.2 (RC00).sub.12in which R is alkyl radical having from 3 to 9 carbon atoms, having an octahedral structure with the six cerium atoms at the apexes of the octahedron, the twelve carboxylate residues forming bidentate bridges between the cerium atoms along the edges of the octahedron, one triply bridging oxygen atom on each face of the octahedron and two unidentate hydroxyl ligands completing the coordination of two opposing cerium atoms.
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Specification