New Extraction Chromatographic Resins or New Tools for

New Extraction Chromatographic Resins or New Tools for the Tool Box E. Philip Horwitz and Daniel R. Mc. Alister PG Research Foundation, Inc. 8205 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(i. Bu. P) 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. LN 2 Resin: A new high resolution resin designed to separate heavy lanthanide pairs. 5. Mn. O 2 Resin: A resin fabricated for use in columns to remove Ra from water samples. (To be presented by Bill Burnett) 6. Sr 2 Resin: A more robust strontium selective resin capable of separating Ra from Ba.

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

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

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

(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 phase density Preferred support Particle diameter ( m) Extractant loading Density of loaded beads Capacity (mg U / m. L bed) 1: 1 molar mixture of DA[AP] and Cyanex 923 0. 902 g/m. L silanized silica 90 -130 40% (w/w) 1. 216 g/m. L 59. 4 (calculated); 49. 2 (measured) Packed Columns Bed density Vs Vm 0. 416 g/m. L 0. 185 m. L / m. L of bed 0. 658 m. L / m. L of bed V s/ V m 0. 281

(LN 2) 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

(Sr 2) Super Strontium Resin