Electrolytic oxidation of cerium 3.sup.+ values to cerium 4.sup.+ values
AssigneeRhone-Poulenc Chimie
InventorsDominique Horbez, Alain Storck, Jean Grosbois
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Abstract
Cerous 3.sup.30 values are converted into ceric 4.sup.+ values, in a conventional separator-free electrolytic cell, by emulsifying an organic phase containing a cerium 4.sup.+ extractant in an aqueous sulfuric phase which includes the cerium 3.sup.+ values to be converted; simultaneously electrolytically oxidizing the cerium 3.sup.+ values into cerium 4.sup.+ values in a zone of electrolysis including an anode and a cathode, whereby the cerium 4.sup.+ values formed are liquid/liquid extracted into the organic phase; separating the resulting emulsion into an aqueous phase and an organic phase enriched in cerium 4.sup.+ values; and recovering the enriched organic phase.
Claims24
A process for the conversion of cerous 3.sup.+ values into ceric 4.sup.+ values, which comprises providing a zone of electrolysis which includes an anode and a cathode emulsifying an organic phase comprising a cerium 4.sup.+ extractant in an aqueous sulfuric phase comprising the cerium 3.sup.+ values to be converted;
- simultaneously in said zone of electrolysis, electrolytically oxidizing said cerium 3.sup.+ values into cerium 4.sup.+ values and extracting said cerium 4.sup.+ values thus formed into said organic phase;
- separating the resulting emulsified organic phase and aqueous sulfuric phase into an aqueous phase and an organic phase enriched in cerium 4.sup.+ values;
- and recovering said organic phase enriched in cerium 4+ values.
Dependencies are inferred from the claim text.