SE-72/AS-72 generator system based on Se extraction/ As reextraction

US8529873B2 · kind B2 · utility

Assignee

• LOS ALAMOS NATIONAL SECURITY, LLC · US

Inventors

• Michael E. Fassbender · Los Alamos, US
• Beau D Ballard · Los Alamos, US

Key dates

• Filing date: Aug 24, 2011
• Grant date: Sep 10, 2013
• Expiry date: Mar 12, 2032

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K51/02
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The preparation of a 72Se/72As radioisotope generator involves forming an acidic aqueous solution of an irradiated alkali bromide target such as a NaBr target, oxidizing soluble bromide in the solution to elemental bromine, removing the elemental bromine, evaporating the resulting solution to a residue, removing hydrogen chloride from the residue, forming an acidic aqueous solution of the residue, adding a chelator that selectively forms a chelation complex with selenium, and extracting the chelation complex from the acidic aqueous solution into an organic phase. As the 72Se generates 72As in the organic phase, the 72As may be extracted repeatedly from the organic phase with an aqueous acid solution.