Pillared hydrotalcites
AssigneeAmoco Corporation
InventorMark A. Drezdon
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Abstract
Magnesium-aluminum, hydrotalcite-type clay compositions containing large, pillaring organic, inorganic, and mixed organic/inorganic anions have been made and shown to demonstrate catalytic properties. 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.
Claims17
A pillared, hydrotalcite-structure composition comprising a compound of formula
- [Mg.sub.2x Al.sub.2 (OH).sub.4x+4 ]Y.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 Y is a large organic anion selected from the group consisting of lauryl sulfate, p-toluenesulfonate, terephthalate, 2,5-dihydroxy-1,4-benzenedisulfonate, and 1,5-napthalenedisulfonate, and wherein x runs between zero and about 3.
A pillared, hydrotalcite-structure composition comprising a compound formula
- [Mg.sub.2x Al.sub.2 (OH).sub.4x+4 ]Y.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 Y is a large organic anion selected from the group consisting of lauryl sulfate, p-toluenesulfonate, terephthalate, 2,5-dihydroxy- 1,4-benzenedisulfonate, and 1,5-naphthalenedisulfonate, and wherein x runs between to about 1.5 to about 2.5, n is 1 or 2, and Z runs between about 3, in which at least some of said large organic anion, Y.sup.n-, is replaced by an anionic polyoxometalate, A.sup.n-, selected from the group consisting of polyoxometalates of vanadium, tungsten and molybdenum.
A pillared, hydrotalcite-structure composition comprising a compound 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 wherein x runs between about 1.5 and about 2.5, n is 6, and Z runs between about zero and about 3.
Dependencies are inferred from the claim text.