三烷基氧膦-石蜡固液萃取-光度法测定磷酸中铀

LIQUID-SOLID EXTRACTION OF URANIUM (Ⅵ) IN PHOSPHORIC ACID WITH TAPO-WAX AND ITS SPECTROPHOTOMETRIC DETERMINATION

摘要: <正> 用三烷基氧膦(TAPO)从硝酸介质中萃取铀的选择性较高,大量PO_4~(3-)离子不干扰,富集能力强,但不易分层,反萃也困难。用TOPO固-液萃取分离铀,以萘,二苯甲酮,联苯和石蜡作溶剂已有报道。它与液-液萃取法比较,具有所需溶剂少,冷却后有机相立即凝固,并浮在液面上便于分离和洗涤的优点。文献3-5均采用乙醇溶解有机相

Abstract: Here is reported the separation of uranium (Ⅵ) in phosphoric acid by liquid-solid extraction with TAPO(Tri-Alkyl-Phosphine Oxide) and wax. The organic phase is stripped with 0.12 mol/1 NaF solution. The uranium is determined spectrophotometrically with Arsenazo Ⅲ and the fluoride ion is masked with 4% boric acid. Results of analyses of phosphoric acid samples by this method are given.