Two powder synthesis of hydrotalcite and hydrotalcite-like compounds with monovalen inorganic anions

摘要

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.