Selective extraction of cu2+and ag+ions from sulfuric acid by synergistic combinations of tetradentate thia macrocycles with didodecylnaphthalene sulfonic acid

Bruce A. Moyer, Curtis L. Westerfield, W. J. McDowell, G. N. Case

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

The aqueous-insoluble thia macrocycles tetrathia-14-crown-4 (TT14C4) and tetrathia-16-crown-4 (TT16C4) strongly and selectively synergize the extraction of Cu2+and Ag+ions from aqueous sulfuric acid solutions by the organophilic cation exchanger didodecylnaphthalene sulfonic acid (HDDNS) in toluene diluent. Over a range of sulfuric acid concentrations, the selectivity is given by the order Ag+> Cu2+> Mn2+, Fe2+, Fe3+, Co2+, Ni2+, and Zn2+, where synergism occurs only for Ag+and Cu2+. Selectivity factors greater than 300 have been achieved for Cu2+over ubiquitous Fe3+. The synergistic extraction of Cu2+and Ag+was explored as a function of sulfuric acid concentration, relative concentration of macrocycle vs. HDDNS, and loading.

Original languageEnglish
Pages (from-to)1325-1344
Number of pages20
JournalSeparation Science and Technology (Philadelphia)
Volume23
Issue number12-13
DOIs
StatePublished - Oct 1 1988

Funding

Dr. Richard M. Kessler, Dr. Samuel A. Bryan, and Dr. C. F. Coleman (ORNL) during the planning, execution, and/or analysis of this work. The participation of Curtis L. Westerfield was made possible through the Oak Ridge Science Semester Program sponsored by ORNL under subcontract 19X-03487s with the Southern Colleges and Universities Union. This research was supported by the Division of Chemical Sciences, Office of Basic Energy Sciences, U.S. Department of Energy under contract DE-AC05-840R21400 with Martin Marietta Energy Systems, Inc.

FundersFunder number
Division of Chemical Sciences
Southern Colleges and Universities Union
U.S. Department of EnergyDE-AC05-840R21400
Basic Energy Sciences
Oak Ridge National Laboratory

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