E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
31/28
E21B 43/28 (2006.01) C22B 60/02 (2006.01)
Patent
CA 1191676
ABSTRACT OF THE DISCLOSURE Leached formations having residual soluble uranium minerals therein are restored by treating the formation under alkaline conditions with a source of phosphate ion whereby insoluble uranium phosphate com- pounds are formed thereby lowering the residual soluble uranium levels below that existing prior to restoration and the formation, and preferably to levels below about 5 milligrams per liter.
416387
Borden Ladner Gervais Llp
Exxon Research And Engineering Company
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