The Recovery of Uraniumfrom Phosphoric Acid
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چکیده
Commercialization of three processes (OPPA, DBPA-TOPO and OPAP) has shown that the DEPA-TOPO process offers the best technology available today for the recovery of uranium from wet-process phosphoric acid. Uranium recovery plants using this process have been successfully operated in the United States, Belgium, Canada and Taiwan. Operating experience from these plants has led to a significant reduction in both capital and operating costs making the DEPA-TOPO process more attractive in today's depressed uranium market. The main process improvements developed at the Oak Ridge National Laboratories are summarized and current process economics are reviewed. New processes now being studied are discussed, including processes using new extractants, ion-exchange resins and liquid membranes and processes for the recovery of uranium from the hemi-hydrate phosphoric acid process.
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