Abstract
Mixtures of macrocyclic polyethers (crown ethers) and organic-phase-soluble liquid cation exchangers have been found to produce a synergistic effect in the extraction of metal ions. The synergistic effect is size selective; that is, it tends to be greatest for those ions that best fit the crown ether cavity. The mixtures of a liquid cation exchanger and a crown ether also allow metal ion extraction from common mineral-acid anion systems (NO/sub 3//sup -/, Cl/sup -/, SO/sub 4//sup 2 -/) that would be impossible with the crown ether alone, because of the difficulty of solubilizing those anions in nonpolar solvents. This cooperation makes the use of crown ethers as size-selective coordinators available for process applications. Size selectivity of compounds such as crown ethers may thus become a useful new parameter in designing selective solvent extraction systems. Results are reported for alkali (including Cs) and alkaline earth (including Sr) extraction by HDEHP mixed with various crown ethers.
Citation Formats
Kinard, W F, and McDowell, W J.
Crown ethers as size-selective synergists in solvent extraction systems: a new selectivity parameter.
United Kingdom: N. p.,
1981.
Web.
doi:10.1016/0022-1902(81)80648-3.
Kinard, W F, & McDowell, W J.
Crown ethers as size-selective synergists in solvent extraction systems: a new selectivity parameter.
United Kingdom.
https://doi.org/10.1016/0022-1902(81)80648-3
Kinard, W F, and McDowell, W J.
1981.
"Crown ethers as size-selective synergists in solvent extraction systems: a new selectivity parameter."
United Kingdom.
https://doi.org/10.1016/0022-1902(81)80648-3.
@misc{etde_5582011,
title = {Crown ethers as size-selective synergists in solvent extraction systems: a new selectivity parameter}
author = {Kinard, W F, and McDowell, W J}
abstractNote = {Mixtures of macrocyclic polyethers (crown ethers) and organic-phase-soluble liquid cation exchangers have been found to produce a synergistic effect in the extraction of metal ions. The synergistic effect is size selective; that is, it tends to be greatest for those ions that best fit the crown ether cavity. The mixtures of a liquid cation exchanger and a crown ether also allow metal ion extraction from common mineral-acid anion systems (NO/sub 3//sup -/, Cl/sup -/, SO/sub 4//sup 2 -/) that would be impossible with the crown ether alone, because of the difficulty of solubilizing those anions in nonpolar solvents. This cooperation makes the use of crown ethers as size-selective coordinators available for process applications. Size selectivity of compounds such as crown ethers may thus become a useful new parameter in designing selective solvent extraction systems. Results are reported for alkali (including Cs) and alkaline earth (including Sr) extraction by HDEHP mixed with various crown ethers.}
doi = {10.1016/0022-1902(81)80648-3}
journal = []
volume = {43:11}
journal type = {AC}
place = {United Kingdom}
year = {1981}
month = {Jan}
}
title = {Crown ethers as size-selective synergists in solvent extraction systems: a new selectivity parameter}
author = {Kinard, W F, and McDowell, W J}
abstractNote = {Mixtures of macrocyclic polyethers (crown ethers) and organic-phase-soluble liquid cation exchangers have been found to produce a synergistic effect in the extraction of metal ions. The synergistic effect is size selective; that is, it tends to be greatest for those ions that best fit the crown ether cavity. The mixtures of a liquid cation exchanger and a crown ether also allow metal ion extraction from common mineral-acid anion systems (NO/sub 3//sup -/, Cl/sup -/, SO/sub 4//sup 2 -/) that would be impossible with the crown ether alone, because of the difficulty of solubilizing those anions in nonpolar solvents. This cooperation makes the use of crown ethers as size-selective coordinators available for process applications. Size selectivity of compounds such as crown ethers may thus become a useful new parameter in designing selective solvent extraction systems. Results are reported for alkali (including Cs) and alkaline earth (including Sr) extraction by HDEHP mixed with various crown ethers.}
doi = {10.1016/0022-1902(81)80648-3}
journal = []
volume = {43:11}
journal type = {AC}
place = {United Kingdom}
year = {1981}
month = {Jan}
}