A gene r Ic c r ansu r an l c (TRU) e Leme nt; ext r ...~i: i.1)(}/recovery proce ss w-a'i dcve Lope.I ha~et1 on the use of octjl(ph.~:-tyl)-~,'J-dtlso-huty1carh"m<)11methylph<)sphin~oxide, O~DCiB)CMPO, dissolved In p:m,r:x p r occ s-s so Lveut (trih1ltyl pho s pha t e , TBP, in no rrna L paraff L n i.c hyd r o c a c b o o , NPH). The p r o c e .. ; ; . . ; ( c a l L e d 'fRUr:X) is c a p a b L e of r educ Lng t he TRTJ C.OI,c.~"trattl)Jl by .nauy o rd e r s o f m~glll.t'.llll~1.11 waste so Lu t t.on s con ta Ln Lng a wide range of n t t r Lc ac t d , se Lc , and fi.~... L.»i pr-oduct; conce nt r at t o-i s , A tnaj o r fea t u r e of 'the p r o c e-ss t s t Irat; Lc ts re ad I l y adap t ab Le fllr t."Iastl.~p roc e s s Lng in e x Ls t Lng fuel re p cdce . .,slll~f::(;i.1.f.til~q. \*Work p e r f o r m e d under th,~aus p t c e s of r b e Office of Rasic E n e r g y Sc Le nc e s , Dl•.I1.:-::l')11 of Chemical Sciences, U. S. De pa r t ment 1)( tEllergy llflJe.("I;q"tr.-,;i: numbe r 'V1-31-109-ENG-38. Cherntc a L T~~hill)1'J3Y nlllf.sioTl. The submitted ~nuscript has been authored by a contractor of ~he u.S. Government under contract No. W-31-109-ENG-38. Accordingly, the U.S. Government retains a nonexclusive, royalty-free license to pUblish or reproduce the published form of this c~~tribution, or allow others to do so, for U.S. Government purposes. , To develop the p r o c e s s a variety of e x t r a c t L o n s t u d t e s w e r e c.t r r-Led out wlth the OD(ill)C;>lPO-TBP-NI'H/HN03 system. Among t he se :.;t."l te~V11~rc~the l n f Lue nce of the cha ttl Le ng r.h of the NPH and the Tn? and Jcfll)(iR)CHPO conceut r a t t on {).1 thlr:t p~FI';'~fo r.na c Lcu , the Lrf L u e n c e of oxalic a c t d RIIII HN'03 c o n c e n t r a t I o n on the s e L e c t t v L t y of qmerlcium ovec flssioll prorlucts and inert constituents, 8fllt the con.l l t 1,1)11':1: foe TRU stri.pping. Ln addit lo n , t h r e e other alkyl-(phenyl)-(lB)CMP() (I~rr.vatlves ....,l~r~s t u d L e . l in Tar'-N?H ."111 c o . n p a r -e d with n-oc t y l Cpheny l ) compound ,