KINETIC STUDY ON THE EXTRACTION OF URANIUM(Ⅵ) WITH DI(2-ETHYLHEXYL)SULFOXIDE FROM NITRIC ACID MEDIA

The kinetic study on the extraction of uranium (Ⅵ)with di(2-ethylhexyl)-sulfoxide from nitric acid media is investigated using an improved constant interfacial area cell. Results demonstrate that the extraction process is controlled by diffusion under the present experimental conditions. The extraction rate expression obtained is:The rate constant of Kf is evaluated as 7.9×10-2m·12.5 ·s-1·mol-2.5, and the apparent active energy as 0.9kJ·mol-1.