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US 4,288,412 AGranted
Post treatment method for the recovery of uranium from wet-process phosphoric acid
AssigneeInstitute of Nuclear Energy Research
InventorsSir-Sea Chang, Sheng-Laang Chern, Gann Ting, Tsai-Shu Kuo
Life of this patent
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Abstract
In the process of uranium recovery from wet-process phosphoric acid, post treatment of the raffinate phosphoric acid is very important to prevent damage to the rubber linings of the acid evaporators and to recover the solvent for reuse. A simple and continuous method using an inclined parallel-corrugated-plate separator to remove the organic solvent entrainment from the raffinate phosphoric acid is established herein.
Claims5
A method of effectively separating residual organic solvent entrained in the phosphoric acid raffinate obtained from uranium extraction comprising:
- passing the raffinate into an inclined tank having parallel lower and upper casings, the tank containing a plurality of plates attached essentially perpendicularly to the lower casing but not touching the upper casing, whereby droplets of said organic solvent separate from the raffinate, flow upward along the lower surface of the plates, continue to flow upward along the inner surface of the upper casing and accumulate as a separate layer on the surface of the raffinate in the tank, the rate of flow of the raffinate into the tank being insufficient to cause said droplets of organic solvent to be carried away in the raffinate flow;
- and
- separately withdrawing the layer of organic solvent and the raffinate from the tank.
Dependencies are inferred from the claim text.