Recovery of europium (II) values by electrolysis

Details Recovery of europium (II) values by electrolysis Recovery of europium (II) values by electrolysis

1988-07-18

1990-07-03

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

204 15, 204 93, 204 94, 204 96, 204129, 423 215, C25B 110

Patent

active

049388525

ABSTRACT:
Highly pure europium (II) values are produced in high yields by electrolytically reducing an aqueous solution of europium (III) values circulating in the cathode compartment of an electrolytic cell, the electrolytic cell including a graphite cathode and an anode compartment separated from the cathode compartment by a cationic exchange membrane, recovering a solution of europium (II) values from the cathode compartment, and advantageously liquid/liquid extracting the europium (II) values thereform, e.g., with an organic solution of an organophosphorus extractant.

REFERENCES:
patent: 3899403 (1975-08-01), Cook, Jr. et al.
patent: 4461748 (1984-07-01), Sabot et al.
patent: 4496523 (1985-01-01), Bonnin et al.
patent: 4676957 (1987-06-01), Martin et al.
Hopkins, Electrochemistry of the Rare Earth Group, The Electrochemical Society, Preprint 89-8, Apr. 15, 1946, pp. 113-114.
"Studies of the Electrochemical Reduction of Europium (III) from Aqueous Solutions on Solid Cathodes", by Zholudeva et al, Chemical Abstracts, vol. 101, No. 19, p. 502, Abstract No. 80655j (1984).
"Recovery of Europium from a Rare Earth Element Mixture", by Kaneko et al., Chemical Abstracts, vol. 105, No. 12, Abstract No. 99923z (1986).

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