DCH-18-C-6/乙酸乙酯萃取体系萃取分离铀(Ⅵ)的研究

Study on the extraction of uranium(Ⅵ) in ethyl acetate system with DCH-18-C-6

以二苯并-18-冠醚-6(DCH-18-C-6)作为萃取剂,采用溶剂萃取法萃取分离溶液中的铀(Ⅵ),研究了稀释剂、盐析剂、介质酸度等条件对萃取率的影响,确定了乙酸乙酯为稀释剂,0.1 mol/L的KH2PO4为盐析剂、水杨酸为酸性介质的溶剂萃取体系。该萃取体系在选定的条件下,对1×10-4mol/L的铀酰离子一次萃取率可达82.5%。

The influence of the diluent, media, salting-out agent from the external environment on the extraction rate of uranium was studied with the DCH-18-C-6 as the extractant of uranium （ Ⅵ）. The opti- uranyl ion（ 1 × 10 ^-4 mol/L ） reaches 82.5% under the optimum conditions.