Patent ID: 6645453
Filing Date: 2003-11-11
Classification: C22B

Abstract:
An improved process for extraction of uranium from wet process phosphoric acid (26-55% P2O5) comprising:a) extracting uranium by contacting said acid with a selective synergistic organic extractant system of di-nonyl phenyl phosphoric acid (DNPPA) and a neutral agent selected from the group consisting of di-butyl butyl phosphonate (DBBP) and tri-n-octyl phosphine oxide (TOPO) maintaining an aqueous to organic phase ratio of 4 to 1:1 to 2; b) recovering the uranium values from loaded organic phase of said organic extractant system following reductive stripping using 8-12 M H3PO4 containing 10 g Fe+2/L at 55-60Â° C. as a stripping media.