Quasi-crystalline carboxylates
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United States of America Patent
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Dec 28, 2004
Grant Date -
Nov 14, 2002
app pub date -
Jan 31, 2002
filing date -
Feb 9, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention provides new compositions of matter, referred to as quasi-crystalline carboxylates (QCCs), their preparation and use. The materials comprise a quasi-crystalline hydrated magnesium-aluminium hydroxy carboxylate and are characterised by the presence of at least a strong reflection in the powder X-ray diffraction pattern at a basal spacing in the range of 5 to 15 .ANG.. The invention further relates to a process for preparing the QCCs, Mg--Al solid solutions and anionic clays under acidic conditions. The QCC is prepared by aging an acidic mixture of a magnesium carboxylate and an aluminium source. Calcination of the QCC results in a Mg--Al solid solution; rehydration of this solid solution gives an anionic clay.
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