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

Yaftian, Mohammad Reza; Vahedpoor, Morteza; Burgard, Michel; Matt, Dominique

doi:10.30492/ijcce.2000.9997

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

Document Type : Research Note

Authors

¹ Department of Chemistry, University of Zanjan, P.O. Box 313-45195, Zanjan, I.R. IRAN

² Laboratory of Mineral and Analytical Chemistry, CNRS, No. 7512, ECPM, University of Louis Pasteur, Strasbourg, FRANCE

³ Group of Molecular Inorganic Chemistry, CNRS, No. 7513, University of Louis Pasteur, Strasbourg, FRANCE

10.30492/ijcce.2000.9997

Abstract

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.