Solvent Extraction of Calcium and Strontium into Nitrobenzene by Using Hydrogen Dicarbollylcobaltate in the Presence of Dibutyl Diethylcarbamoylmethylene Phosphonate

Extraction of micro amounts of calcium and strontium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H + B − ) in the presence of dibutyl diethylcarbamoylmethylene phosphonate (DBDECMP, L) has been investigated. The equilibrium data have been explained assuming that the complexes HL + ,...

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Bibliographic Details
Published inJournal of solution chemistry Vol. 39; no. 5; pp. 692 - 700
Main Authors Makrlik, E, Vanura, P, Selucky, P
Format Journal Article
LanguageEnglish
Published Boston Springer US 01.05.2010
Subjects
Calcium
Cations
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Geochemistry
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Nitrobenzenes
Oceanography
Phosphonates
Physical Chemistry
Solvent extraction
Stability
Stability constants
Strontium
Strontium
Water–nitrobenzene system
Dibutyl diethylcarbamoylmethylene phosphonate
Calcium
Hydrogen dicarbollylcobaltate
Extraction and stability constants
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Summary:Extraction of micro amounts of calcium and strontium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H + B − ) in the presence of dibutyl diethylcarbamoylmethylene phosphonate (DBDECMP, L) has been investigated. The equilibrium data have been explained assuming that the complexes HL + , , and (M 2+ =Ca 2+ ,Sr 2+ ) are extracted into the organic phase. The values of extraction and stability constants of the species in nitrobenzene saturated with water have been determined. It was found that the stability of the complex cations , , and , where L is DBDECMP, increases in the order Sr 2+ <Ca 2+ ≪Eu 3+ ≈Am 3+ .
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:0095-9782
1572-8927
DOI:10.1007/s10953-010-9525-x