Method for conditioning ion exchange resins and apparatus for carrying out the method

US12033766B2 · kind B2 · utility

Assignee

• FRAMATOME · FR

Inventors

• Gert Seybert · Oberfellendorf, DE
• Robert Joshua Lehr · Erlangen, DE
• Bertram Zeiler · Erlangen, DE
• Philip Schuberth · Erlangen, DE
• Steffen Weiss · Eindhoven, NL

Key dates

• Filing date: Nov 28, 2019
• Grant date: Jul 9, 2024
• Expiry date: Aug 17, 2041

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2219/0879
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A method for conditioning of spent ion exchange resins from nuclear facilities comprises the steps of: mixing the spent ion exchange resins with water to form a reaction mixture; setting and controlling the pH of the reaction mixture in a range from 1.0 to 3.5, preferably in a range from 2.0 to 3.0; adding an oxidant to the reaction mixture, with the temperature of the reaction mixture maintained at 90°° C. or less so that the spent ion exchange resin and the oxidant react with each other to form an aqueous reaction solution comprising the organic reaction products of the spent ion exchange resin; and electrochemically oxidizing the organic reaction products, wherein carbon dioxide is produced and a carbon-depleted aqueous reaction solution having a TOC (total organic carbon) value of less than 50 ppm is obtained. Furthermore, an apparatus for the conditioning of spent ion exchange resins from nuclear facilities is described.