Method for producing water-dispersible alpha-alumina monohydrate
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United States of America Patent
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Nov 6, 2001
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app pub date -
Jun 10, 1999
filing date -
Jun 10, 1999
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Abstract
A method of enhancing the dispersibility of alpha-alumina monohydrate wherein there is formed a mixture of an alpha-alumnina monohydrate, water, and a dispersibility enhancer comprising an effective amount of a monobasic acid, a salt selected from the group consisting of salts having the formula MX wherein M is a polyvalent metal cation constituent for which the solubility product K.sub.SP of the corresponding metal hydroxide is less than 10.sup.-20 and wherein X is an anion constituent derived from a monovalent acid having an ionization constant K.sub.A greater than 10.sup.+1 and certain phosphorus and antimony chlorides, followed by drying the mixture, without aging, to produce a dried, alpha-alumina monohydrate having advanced water dispersibility.
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