New Extraction Chromatographic Resins or New Tools for the Tool Box E. Philip Horwitz and Daniel R. McAlister PG Research Foundation, Inc South Cass Avenue, Suite 111 Darien, IL 60561

Contents 1.Tetraalkyl diglycolamide (DGA) resins: DGA resins have unique actinide retention properties. 2.PSM 125 sterically hindered neutral phosphonate [di(4-methylpentyl- 2-oxy) isobutylphosphonate]DMPe(iBuP) resin: PSM 125 is similar to UTEVA but has improved uranium selectivity. 3.UTEVA-2: A robust tetra- and hexavalent actinide selective resin designed for waste treatment or the isolation of Th and U from large volumes of solutions. 4.LN2 Resin: A new high resolution resin designed to separate heavy lanthanide pairs. 5.MnO 2 Resin: A resin fabricated for use in columns to remove Ra from water samples. (To be presented by Bill Burnett) 6.Sr2 Resin: A more robust strontium selective resin capable of separating Ra from Ba.

Diglycolamide (DGA) Resin Extractant: Extraction Equilibrium: N,N,N’,N’-tetra-n-alkyl-3-oxopentanediamide (TN-DGA) N,N,N’,N’-tetra-(branched-alkyl)-3-oxopentanediamide (TB-DGA) M(NO 3 ) 3 E 3 M = Ln, An M NO E

PSM 125 Uranium Selective Resin Di (4 methylpentyl-2-oxy) isobutylphosphonate O = O P O

Acetohydroxamic Acid (AHA) H CH 3 – C – N – OH = O CH 3 C – N H = – O O M 4

(UTEVA-2) An Improved Extraction Chromatographic Resin for the Uptake and Recovery of Uranium from a Wide Range of Acidic Nitrate Media

Characteristics of the UTEVA-2 Extraction Chromatographic Resin and Packed Columns Bulk Material Stationary phase1:1 molar mixture of DA[AP] and Cyanex 923 Stationary phase density0.902 g/mL Preferred supportsilanized silica Particle diameter (  m) Extractant loading40% (w/w) Density of loaded beads1.216 g/mL Capacity (mg U / mL bed)59.4 (calculated); 49.2 (measured) Packed Columns Bed density0.416 g/mL V s mL / mL of bed V m mL / mL of bed V s / V m 0.281

(LN2) A new EXC resin for the separation of heavy lanthanide pairs

Separation of Lu from Yb Using LN-2 Resin Note: scale on left is linear and scale on right is logarithmic

(Sr2) Super Strontium Resin