Issue 24, 1999
From the journal:

Chemical Communications

Selective extraction of strontium with supercritical fluid carbon dioxide

Chien M. Wai,   Hwa-Kwang Yak,   Xiaoyuan Chen,   Suh-Jane Lee  and  Yurii Kulyako  

Abstract

Strontium (Sr2+) can be selectively extracted from aqueous solutions into supercritical fluid CO2 at 60 °C and 100 atm with dicyclohexano-18-crown-6 (DC18C6) using CF3(CF2)6CO2– (PFOA–) or CF3(CF2)6CF2SO3– (PFOSA–) as a counter anion; at a mole ratio of Sr2+ : DC18C6 : PFOA– = 1:10:50, the extraction of Sr (5.6 × 10–5 M) from water at pH 3 is near quantitative whereas Ca2+ and Mg2+ at equal concentration are only extracted to a level of 7 and 1%, respectively; PFOSA– is an effective counter anion for selective extraction of Sr2+ from 1.3 M HNO3 with DC18C6 in supercritical CO2.

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Article information

DOI
https://doi.org/10.1039/A904527I
Article type
Paper

Chem. Commun., 1999, 2533-2534

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Selective extraction of strontium with supercritical fluid carbon dioxide

C. M. Wai, H. Yak, X. Chen, S. Lee and Y. Kulyako, Chem. Commun., 1999, 2533 DOI: 10.1039/A904527I

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