Solid-liquid extraction for yttrium recovery using porous polymeric resin(XAD-7) functionalized with D_(2)EHPA  

作　　者：P.A.Martínez-Montoya R.G.Sanchez-Alvarado D.Y.Medina-Velazquez M.L.Carrera-Jota P.Garnica-Chávez A.de J.Morales-Ramirez 

机构地区：[1]Higher School of Chemical Engineering and Extractive Industries,ESIQIE,IPN,Department of Metallurgical Engineering,UPALM S/N,Col.Lindavista,Gustavo A.Madero Cd.de México,C.P,07738,Mexico [2]Metropolitan Autonomous University,Department of Materials,Basic Sciences and Engineering,Av.San Pablo No.180,Col.Reynosa Tamaulipas,Cd.de México,C.P,02200,Mexico [3]Center for Research and Technological Innovation,CIITEC,IPN,Cda.de CECATI,s/n,Santa Catarina,Azcapotzalco,C.P,02250,CDMX,Mexico

出　　处：《Journal of Rare Earths》2024年第9期1764-1773,I0005,共11页稀土学报（英文版）

基　　金：Project supported by Secretariat of Research and Postgraduate Studies National Polytechnic Institute (20221369 and 20231939);Consejo Nacional de Ciencia y Tecnologia CONACyT。

摘　　要：The recovery of yttrium is proposed by applying a solid-liquid extraction process using di-2-ethyl hexylphosphoric acid(D2EHPA) as extracting agent.The extracting agents were supported on a macro porous polymeric resin XAD-7(solid phase).Yttrium ions extraction and discharge tests were performed,firstly from a synthetic aqueous solution of 100 mg/L Y(liquid phase) at 25℃ with stirring.The effects of pH of aqueous solutions bearing yttrium,volume fraction of extracting agents and the solid/liquid(S/L)ratio on the yttrium recovery were studied.The most favorable conditions for yttrium ions extraction are;20 vol% D_(2)EHPA functionalized resin,pH=1.5 and an S/L ratio of 10 mg/mL The discharge of yttrium ions was done under the same conditions of extraction stage,using a 2 mol/L [H_(2)SO_(4)] as stripping solution.Up to 80% yttrium is extracted,while 75% yttrium is recovered in the striping solution.In all experiments,the reaction equilibrium is reached after 20 min,and the kinetics for the extraction stage was determined as a second-order model.Also,experiments were carried out to discharge the yttriumloaded resins,and it has been determined that the best pH value to strip the Y ions is 1.5.Cyclic tests of extraction and discharge for yttrium ions show that the functionalized resin can work at least five cycles without decreasing its efficiency.Finally,the proposed process was tested in a real solution with Y ions fro m a waste fluorescent la mp powder leached in H_(2)SO_(4),demonstrating the ability to effectively recover yttrium,separating it from various metals from the studied residue.

关 键 词：Yttrium recovery Rare earth solid-liquid extraction XAD-7 resin Fluorescent lamps recycling Solid-liquid kinetics extraction 

分 类 号：TF845.2[冶金工程—有色金属冶金]