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 language | English |
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Pages (from-to) | 1325-1344 |
Number of pages | 20 |
Journal | Separation Science and Technology (Philadelphia) |
Volume | 23 |
Issue number | 12-13 |
DOIs | |
State | Published - 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.
Funders | Funder number |
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Division of Chemical Sciences | |
Southern Colleges and Universities Union | |
U.S. Department of Energy | DE-AC05-840R21400 |
Basic Energy Sciences | |
Oak Ridge National Laboratory |