Process for the removal of cadmium ions from phosphoric acid resulting from a wet process
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United States of America Patent
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Nov 26, 1991
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N/A
app pub date -
May 25, 1990
filing date -
May 26, 1989
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Expired
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Abstract
A process for the removal of cadmium ions by liquid-liquid extraction from wet process phosphoric acid, which had been obtained from crude phosphate ores by dissolution with sulfuric acid, uses salts of long chain alkyl amines or ammonium bases with the chlorocomplexes of polyvalent metal ions, which are dissolved in an inert organic solvent.
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