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AbstractAbstract
[en] The extraction of uranium is discribed and for which several parameters such as choice of the extracting agent, uranium oxidation, temperature, phase volume ratio, equilibrium time and number of stages are studied. A synergic mixture constituted by 0,5M DZEHPA/0,125M TOPO in kerosene is used as extracting agent. The uranium extraction is performed by using both batch process and continuous as well as discontinuous counter-current and processes in bench scale. An overall yield of 96% is obtained when the extraction experiment is performed at 450C in a 5-stage continuous extraction process. (Author)
[pt]
Estuda-se a otimizacoes dos parametros de extracao de uranio entre eles a definicao do sistema extrator oxidacao do uranio, influencia da temperatura, determinacao da relacao de fases, tempo de equilibrio e numero de estagios, tomando como base os processos de extracao com acidos dialquilfosforicos. Realizou-se o estudo de extracao em escala de laboratorio, usando camaras de extracao nos experimentos em psendo contra-corrente e misturadores-decantadores do tipo Pump-Mix no processo continuo. Usou-se como agente extrator a mistura sinergica DZEHPA 0,5M/TOPO 0,125M em querosene. Obteve-se processo de extracao continua realizada a 450C, para cinco estagios de equilibrio, um rendimento de 96%. (Autor)Original Title
Estudo para extracao de uranio em acido fosforico comercial
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1984; 141 p; (M.Sc.).
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Miscellaneous
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Thesis/Dissertation
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