Abstract
Uranium is currently recovered from both sulfuric acid and carbonate leach liquors using anion exchange resins. This technology is based upon the facts that uranium exists as anionic complexes in these liquors and that the anion exchange resins have a high selectivity for these complexes. Whereas this technology is most effective in most situations, in the case of in situ solution mining with dilute alkaline solutions, the anion exchange technique is faced with such problems as ground water contamination and poor yellow cake product purity. Unexpectedly, the use of a carboxylic cation exchange resin has been found to be quite effective for recovering the uranium from the in situ solution mining alkaline liquor, thereby overcoming the problems associated with the anion exchange process. Not only is the cation exchange process more effective, the carboxylic acid cation exchange resins are considerably more stable and lower in cost than the anion exchange resins.
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