Purification of Thorium From Uranium-233 Process Residue

Separation and purification of Th from U by ammonium molybdophosphate from nitric solutions

“…The saturation capacity was calculated according to the following equations: where V (S%=100) is the volume of solution at sorption percent = 100 (mL), C 0 is the Th concentration in the feed solution (mg/mL), m is the exchanger mass (g). From this figure it is clear that the extraction decreased by increasing of Th concentration, the saturation capacity of Th is 120 mg Th/g AMP in the case of 0.1 M HNO 3 and 80 mg Th/g AMP in 3 M HNO 3 .…”

“…The quality of the crystalline product determined by chemical analysis (Mo measured by atomic absorption, NH 4 + and PO 4 were measured by IC). The results of the analysis of the product are given below and show that they have the composition [(NH 4 ) 3 AMP was found insoluble in acidic solution (HNO 3 , HCl) but soluble in alkaline solution (NaOH, NH 4 OH).…”

“…The precipitate was filtered and washed with water and then dried. The filtrate (dissolved AMP) was then treated with 6 M HNO 3 where AMP was precipitated, filtered and washed for reuse. The developed flow chart for separation and purification of thorium from uranium is proposed.…”

“…Webb et al [3] studied the purification of thorium from uranium-233 process residue. It was found that 65% of thorium was selectively retained on Rellex HPQ (polyvinyl pyrdine) anion-exchange resin from 7.5 M HNO 3 while U(VI), Ac(III), Fe(III), Al(III), Ra(II) and Pb(II) were eluted.…”