High surface area meixnerite from hydrotalcites infiltrated with

Details High surface area meixnerite from hydrotalcites infiltrated with High surface area meixnerite from hydrotalcites infiltrated with

1996-12-20

1998-05-12

Beck, Shrive

Catalyst, solid sorbent, or support therefor: product or process

Zeolite or clay, including gallium analogs

Clay

502176, 502328, 502332, 502335, 502336, 502341, 502346, 502414, 423600, B01J 2102

Patent

active

057504539

ABSTRACT:
A method for making a synthetic mixed metal oxide or meixnerite which, when activated, has a high B.E.T. surface area, typically about 290 m.sup.2 /g or greater. The method comprises activating hydrotalcite, then cooling and hydrating such activated material with a metal salt solution in a carbon dioxide-free environment. Such hydration can produce a material that absorbs more than 100% of its weight in water. Following hydration, this material is activated a second time in a virtually carbon dioxide-free environment. Such reactivation decomposes the salt and leaves a supported metal oxide readily available to be used for catalyst reactions.

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Shen, J. et al., "Synthesis and Surface Acid/Base Properties of Magnesium-Aluminum Mixed Oxides Obtained from Hydrotalcites", Langmuir, vol. 10, No. 10, 1994, pp. 3902 3908. (No Month).
Mascolo, G. et al, "A New Synthesis and Characterization of Magnesium-Aluminum Hydroxides", Mineralogical Magazine, Mar. 1980, vol. 43, pp. 619-621.
Pausch, I. et al, "Syntheses of Discordered and A1-Rich Hydrotalcite-Like Compounds",Clay and Clay Minerals, vol. 34, No. 5, 1986, pp. 507-510. (No Month).
Dimotakis, E. et al, "Communications",Inorganic Chemistry, vol. 29, No. 13, Jun. 27, 1990, pp. 2393-2394.

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