Process for extracting heavy metal ions from aqueous solutions
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United States of America Patent
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Mar 5, 1985
Issued Date -
N/A
app pub date -
Feb 23, 1984
filing date -
Jul 15, 1981
priority date (Note) -
Expired
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Abstract
The disclosure relates to a process for liquid/liquid-extraction of heavy metal ions from acid aqueous solutions with the aid of water-insoluble dithiophosphoric acid diesters as extracting agents. More particularly, use is made of phosphoric acid solutions with a P.sub.2 O.sub.5 -content of from 3 to 80 weight %, the solutions being free from emulsion-forming organic contaminants or having previously been freed therefrom in known manner. The resulting aqueous phase is separated from the phase containing the dithiophosphoric acid diester.
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