C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/375
C22B 3/00 (2006.01) C01B 25/238 (2006.01) C22B 3/38 (2006.01)
Patent
CA 1191700
PROCESS FOR EXTRACTING HEAVY METAL IONS FROM AQUEOUS SOLUTIONS ABSTRACT OF THE DISCLOSURE: 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 P2O5- 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.
406297
Gradl Reinhard
Krause Werner
Schimmel Gunter
Fetherstonhaugh & Co.
Hoechst Aktiengesellschaft
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