Purification of kaolin clay by froth flotation using hydroxamate collectors
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United States of America Patent
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Dec 16, 1986
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N/A
app pub date -
Nov 29, 1984
filing date -
Nov 29, 1984
priority date (Note) -
Expired
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Abstract
An improved flotation process for removal of colored titaniferous impurities from kaolin clay uses as collector a hydroxamate compound, or a mixture of compounds, having the formula ##STR1## in which R is an alkyl, aryl, or alkylaryl group having 4-28, and preferably 6-24 carbon atoms, and M represents an alkali metal, an alkaline earth metal or hydrogen. The process does not require the use of activators to make the collector adsorb selectively on the colored impurities.
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