Two powder synthesis of hydrotalcite and hydrotalcite-like compounds with monovalen inorganic anions
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United States of America Patent
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Jul 7, 1998
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app pub date -
Apr 9, 1996
filing date -
Apr 29, 1994
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Abstract
There is provided a method for making a monovalent inorganic anion-intercalated hydrotalcite-like material by first reacting a magnesium-containing powder and a transition alumina powder in a carboxylic acid-free, aqueous suspension to form a meixnerite intermediate. This intermediate is then contacted with a monovalent inorganic anion, in its acid or soluble salt form, to make a hydrotalcite-like material. The latter is then separated from the suspension. Representative materials include a bromide-, chloride-, nitrate- or vanadate-intercalated, hydrotalcite-like material.
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