Hydrotalcites, syntheses, and uses
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United States of America Patent
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Jan 25, 2005
Grant Date -
Jun 19, 2003
app pub date -
Jan 11, 2002
filing date -
Aug 23, 2001
priority date (Note) -
Expired
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Abstract
Synthetic hydrotalcites of the general formula [M.sup.2+.sub.1-x M.sup.3+.sub.x (OH).sub.2 ].sup.x+ [A.sup.n-.sub.x/n.multidot.mH.sub.2 O].sup.x- where M.sup.2+ is a divalent cation, M.sup.3+ is a trivalent cation and A.sup.n- is an organic anion selected from straight chain carboxylates of C.sub.16 -C.sub.18 acids, carboxylates of aromatic acids, carboxylates of acrylic acid, unsaturated carboxylates of methacrylic acid, unsaturated carboxylates of vinylacetic acid and C.sub.2 and higher organic acids containing heteroatoms such as nitrogen, phosphorous, sulfur and halogens are disclosed, along with methods of synthesis and uses.
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