| (19) |
 |
|
(11) |
EP 0 066 988 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
02.11.1983 Bulletin 1983/44 |
| (43) |
Date of publication A2: |
|
15.12.1982 Bulletin 1982/50 |
| (22) |
Date of filing: 20.05.1982 |
|
|
| (84) |
Designated Contracting States: |
|
BE CH DE FR GB IT LI SE |
| (30) |
Priority: |
22.05.1981 US 266676
|
| (71) |
Applicant: WESTINGHOUSE ELECTRIC CORPORATION |
|
() |
|
|
| |
|
| (54) |
Method of recovering uranium |
(57) Method of recovering uranium from a silicate-uranium coprecipitate by leaching the
coprecipitate with a leachate having a pH of from 2 to 3, followed by filtering the
coprecipitate. The uranium is dissolved in the filtrate but the silicate is insoluble.
The leachate is preferably an aqueous solution of nitric acid which is also used to
wash the coprecipitate. The uranium can be extracted from the filtrate using an organic
extractant containing DEPA-TOPO.