Catalysis using pillared hydrotalcites
AssigneeAmoco Corporation
InventorsMark A. Drezdzon, Eric J. Moore, Mark P. Kaminsky
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Abstract
Magnesium-aluminum, hydrotalcite-type clay compositions containing large, pillaring organic, inorganic, and mixed organic/inorganic anions have been made. Heating of the mixed large organic/inorganic anion hydrotalcite-type clays can lead to substantially complete removal of the organic anions and a route to making large, inorganic-anion, hydrotalcite-type clays with more open galleries. These materials are shown to catalyze hydrocarbon conversion reactions.
Claims11
A process to dehydrogenate a C.sub.1 to C.sub.5 alkyl-substituted ethyl benezene to a C.sub.1 to C.sub.5 alkyl-substituted styrene comprising contacting said alkyl-substituted ethylbenzene under dehydrogenation conditions with a catalyst comprising a pillared, hydrotalcite-structure composition of formula [Mg.sub.2x Al.sub.2 (OH).sub.4x4 ]A.sup.n-.sub.2/n.ZH.sub.2 O having an X-ray diffraction d(003) value substantially greater than the hydrotalcite value of about 8 Angstroms, wherein A is an anionic polyoxometalate selected from the group consisting of polyoxometalates of vanadium, tungsten, and molybdenum, and x runs between about 1.5 and about 1.5, n is 6, and Z runs between about 0 to 3.
A process to ammoxidize a methyl-substituted benzene comprising contacting said methyl-substituted benzene under ammoxidation conditions with a catalyst comprising a pillared, hydrotalcite-structure composition of formula [Mg.sub.2x Al.sub.2 (OH).sub.4x+4 ]A.sup.n-.sub.2/n.ZH.sub.2 O having an X-ray diffraction d(003) value substantially greater than the hydrotalcite value of about 8 Angstroms, wherein A is an anionic polyoxometalate selected from the group consisting of polyoxometalates of vanadium, tungsten, and molybdenum, and x runs between about 1.5 and about 2.5, n is 6, and Z runs between about zero and about 3.
A process to convert an organic material comprising contacting said material under conversion conditions with a catalyst comprising a pillared, hydrotalcite-structure composition made by calcining a compound of formula [Mg.sub.2x Al.sub.2 (OH).sub.4x+4 ](Y.sup.n- A.sup.m-).sub.2/n+m.ZH.sub.2 O, where x runs between about 1.5 to about 2.5, Y is an organic anion pillar, n is 1 or 2, A is an inorganic anion pillar, m is 6, and z runs between zero and about 3 until substantially all said organic anion pillar is removed
Dependencies are inferred from the claim text.