Recovery of europium (II) values by electrolysis
US4938852A · kind A · utility
0Cited by
4References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1988 |
| Grant date | Jul 3, 1990 |
| Priority date | — |
| Expiry date | Jul 18, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01F17/282
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.