Process for recovery of phosphate ore
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United States of America Patent
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-
Apr 16, 1985
Issued Date -
N/A
app pub date -
Dec 1, 1978
filing date -
Jun 24, 1977
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Phosphate ore is concentrated by flotation in the presence of a half-ester of an organic dicarboxylic acid, such as maleic acid, with a saturated aliphatic alcohol containing at least 11 carbon atoms. Water and oil also are present. The half-ester may be partly neutralized, e.g. with caustic soda, in an amount at most sufficient to raise the pH to 7.0.
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