☆ 4.5 Article

Chemical studies on uranium extraction from concentrated phosphoric acid by using PC88A and DBBP mixture

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY (2011)

期刊

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY

卷 290, 期 2, 页码 353-359

出版社

SPRINGER

DOI: 10.1007/s10967-011-1372-8

关键词

Uranium; Extraction; Phosphoric acid; Kinetics

类别

Chemistry, Analytical Chemistry, Inorganic & Nuclear Nuclear Science & Technology

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摘要

Liquid-liquid extraction of U (VI) from concentrated phosphoric acid by using (2-ethyl hexyl) phosphonic acid, mono (2-ethyl hexyl) ester (PC88A) and di-butyl butyl phosphonate (DBBP) has been investigated. The effect of different factors affecting the extraction process (PC88A concentration, DBBP concentration, shaking time, aqueous/organic phase ratio, phosphoric acid concentration and effect of diluents) have been investigated. The obtained data of temperature on the extraction showed that the enthalpy change is -17.15 kJ mol(-1). Uranium was extracted from the strip liquor by using di (2-ethylhexyl) phosphoric acid and tri-octyl phosphine oxide mixture and finally converted to a high purity UO3 product using precipitation with hydrogen peroxide and heat treatment at 365 A degrees C.

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