DOWEX Resins for Separation of Actinium, Thorium and Protactinium from Liquid Media

Elements Actinium - Ac Thorium - Th Protactinium - Pa Actinium, Thorium, and Protactium are extremely rare metals that occur naturally in uranium ores.

In HCl, protactinium is absorbed by DOWEX™ 21K XLT strong base anion exchange resin and has a low affinity for a strong acid cation resin like DOWEX G-26 (H) resin. Thorium, on the other hand, is strongly absorbed from HCl by a strong acid cation resin like DOWEX G-26 (H) resin and has a low affinity for a strong base anion exchange resin.

Actinium is not ionically active and, therefore, it is not amenable to ion exchange separations.

DOWEX Ion Exchange Resins

Product	Description	Type	Matrix	Total Exchange Capacity* eq/l (kgr/ft3)	Available Forms
DOWEX 21K XLT	Uniform particle size, high capacity, strong base anion exchange resin for mineral processing applications.	Type I Strong Base Anion	Styrene-DVB, Gel	1.4	Cl-
DOWEX G-26 (H)	Uniform particle size strong acid cation exchange resin for specialty demineralization and catalyst applications.	Strong Acid Cation	Styrene-DVB, Gel	2.0	H+