C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/207
C22B 60/02 (2006.01) C01G 39/00 (2006.01) C01G 43/00 (2006.01)
Patent
CA 1097926
Abstract of the Disclosure A method of controlling the molybdenum content of uranium yellowcake which is precipitated from an eluate of ammonium carbonate. The pH of the eluate is maintained at a relatively high value, i.e., never less than 9.3, while the eluate is heated to strip off ammonia, carbon dioxide, and water. Ammonia is added to the eluate during heating to keep the pH high and the molybdenum in solution in the eluate. Also, the precipitated uranium yellowcake may be treated by adding aqueous ammonia and heating to form an insoluble uranium salt and a soluble molybdenum salt which can be filtered to produce a uranium yellowcake having a reduced molybdenum content. -1-
299650
Kuehl Guenter H.
Sherry Howard S.
Gowling Lafleur Henderson Llp
Mobil Oil Corporation
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