摘要
Instrument of IR spectrometer and methods of saturation, equimolar series change and slope were applied to study the extraction mechanism of Cyanex272-P507 impregnated resin for heavy rare earths from hydrochloric acid solution. The results show that the molar ratio of Cyanex272-P507 to rare earth in the extraction complex is 3. Chlorine ions do not participate in coordination. The extraction reaction can be expressed as RE3＋（a） ＋ 3-HA（r） ＋ 3/2HL（r）= [REA3/2L3/2]（r） ＋ 3H＋（a） （where HA represents 2 2 Cyanex272 and HL represents P507）. The synergic extractant formed in extraction chromatography is in a form ofmonopolymer and with a chemical structure of REA3/2L3/2.
Instrument of IR spectrometer and methods of saturation,equimolar series change and slope were applied to study the extraction mechanism of Cyanex272-P507 impregnated resin for heavy rare earths from hydrochloric acid solution.The results show that the molar ratio of Cyanex272-P507 to rare earth in the extraction complex is 3.Chlorine ions do not participate in coordination.The extraction reaction can be expressed asHL(r) 2 3H A(r) 2 3R E(a)3+++=[REAL](r)3H(a) 3/23/2 + +(where HA represents Cyanex272 and HL represents P507).The synergic extractant formed in extraction chromatography is in a form of monopolymer and with a chemical structure of REA3/2L3/2.
基金
Project(50764003) supported by the National Natural Science Foundation of China
Project(0450065) supported by the Natural Science Foundation of JiangXi Province,China
