TY - JOUR ID - 9997 TI - Solvent Extraction and Transport of Rare Earth Metal Ions Using 5.11.17.23-Tetra-tert-butyl-25,27-bis (diethylcarbomoylmethoxy)-26,28-dihydroxy Calix[4]arene JO - Iranian Journal of Chemistry and Chemical Engineering JA - IJCCE LA - en SN - 1021-9986 AU - Yaftian, Mohammad Reza AU - Vahedpoor, Morteza AU - Burgard, Michel AU - Matt, Dominique AD - Department of Chemistry, University of Zanjan, P.O. Box 313-45195, Zanjan, I.R. IRAN AD - Laboratory of Mineral and Analytical Chemistry, CNRS, No. 7512, ECPM, University of Louis Pasteur, Strasbourg, FRANCE AD - Group of Molecular Inorganic Chemistry, CNRS, No. 7513, University of Louis Pasteur, Strasbourg, FRANCE Y1 - 2000 PY - 2000 VL - 19 IS - 2 SP - 60 EP - 64 KW - Calix[4]arene KW - Extraction KW - Transport KW - Rare earth KW - Metal ions DO - 10.30492/ijcce.2000.9997 N2 - The solvent extraction of rare earth metal ions from nitrate solutions by 5.11.17.23-tetra-tert-butyl-25,27-bis(diethylcarbamoylmethoxy)-26,28-dihydroxycalix[4]arene (L) in 1,2-dichloroethane has been investigated. The alalysis of the extraction equilibrium obtained from a mixture of La3+, Eu3+, Er3+ and Y3+ revealed that the extracted species have a 1:1 metal/ligand ratio. The intra-group separation efficiencies of the ligand have been evaluated in a competitive extraction and transport of 11 rare earth metal ions (La3+, pr3+, Nd3+, Sm3+, Eu3+, Gd3+, Dy3+, Ho3+, Yb3+ and Y3+). The transport experiment has been performed through a supported liguid membrane containing the ligand in o-nitrophenyl hexyl ether (NPHE). The distribution ratio and the flux of the ions generally increases as the atomic radii decrease.   UR - https://ijcce.ac.ir/article_9997.html L1 - https://ijcce.ac.ir/article_9997_9a57ea51574a9ab1d2a36174b0a42536.pdf ER -