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New Extraction Chromatographic Resins or New Tools for the Tool Box

This article explores the properties and applications of new extraction chromatographic resins, including tetraalkyl diglycolamide (DGA) resins, PSM 125, UTEVA-2, LN2, MnO2, and Sr2 resins. These resins offer improved capabilities for actinide retention, uranium selectivity, lanthanide separation, and strontium selectivity.

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New Extraction Chromatographic Resins or New Tools for the Tool Box

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  1. New Extraction Chromatographic Resins or New Tools for the Tool Box E. Philip Horwitz and Daniel R. McAlister PG Research Foundation, Inc. 8205 South Cass Avenue, Suite 111 Darien, IL 60561

  2. Contents • Tetraalkyl diglycolamide (DGA) resins: DGA resins have unique actinide retention properties. • 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. • 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. • LN2 Resin: A new high resolution resin designed to separate heavy lanthanide pairs. • MnO2 Resin: A resin fabricated for use in columns to remove Ra from water samples. (To be presented by Bill Burnett) • Sr2 Resin: A more robust strontium selective resin capable of separating Ra from Ba.

  3. 3 + - M ( N O ) E M + 3 N O + 3 E 3 3 3 3 M = L n , A n Diglycolamide (DGA) Resin Extractant: N,N,N’,N’-tetra-n-alkyl-3-oxopentanediamide (TN-DGA) N,N,N’,N’-tetra-(branched-alkyl)-3-oxopentanediamide (TB-DGA) Extraction Equilibrium:

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

  5. Acetohydroxamic Acid (AHA) H CH3 – C – N – OH O = CH3 H C – N – = O O M 4

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

  7. Characteristics of the UTEVA-2 Extraction Chromatographic Resin and Packed Columns Bulk Material Stationary phase 1:1 molar mixture of DA[AP] and Cyanex 923 Stationary phase density 0.902 g/mL Preferred support silanized silica Particle diameter (m) 90-130 Extractant loading 40% (w/w) Density of loaded beads 1.216 g/mL Capacity (mg U / mL bed) 59.4 (calculated); 49.2 (measured) Packed Columns Bed density 0.416 g/mL Vs 0.185 mL / mL of bed Vm 0.658 mL / mL of bed Vs/Vm 0.281

  8. (LN2) A new EXC resin for theseparation of heavy lanthanide pairs

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

  10. (Sr2) Super Strontium Resin

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