C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/218
C22B 60/02 (2006.01)
Patent
CA 1154268
ABSTRACT A synergistic extractant combination consisting of di(2-ethylhexyl) phosphoric acid (D2EHPA) and dibutyl butyl phosphonate (DBBP) in kerosene is employed in a two-cycle separation process for the recovery of uranium from wet-process phosphoric acid. The addition of the sulfuric acid and water scrubbing steps for the recycled extractant produces no problems to the contamination and dilution by the ammonium ion and water to the phos- phoric acid and also no precipitation occurs in the second cycle extraction step. The advantages of this process are lower chemical cost, higher product purity and better phase separation in comparison with the previous process.
364385
Chen Hsiao-Ming
Ting Gann
Tsai Ying-Ming
Institute Of Nuclear Energy Research
Marks & Clerk
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