Adsorption-extraction mechanism of heavy rare earth by Cyanex272-P507 impregnated resin  

作　　者：廖春发 焦芸芬 梁勇 姜平国 聂华平 

机构地区：[1]School of Materials and Chemistry Engineering,Jiangxi University of Science and Technology

出　　处：《Transactions of Nonferrous Metals Society of China》2010年第8期1511-1516,共6页中国有色金属学报（英文版）

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

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.

关 键 词：CYANEX272 P507 impregnated resin heavy rare earth elements adsorption-extraction mechanism 

分 类 号：TF845[冶金工程—有色金属冶金]