ChemInform Abstract: Solvent Extraction Investigation of Molybdenum(VI) Equilibria

Autor:	J. J. Cruywagen, A. G. Draaijer
Rok vydání:	2010
Předmět:	chemistry.chemical_compound Stability constants of complexes Chemistry Molybdenum Condensation Inorganic chemistry Extraction (chemistry) Aqueous two-phase system chemistry.chemical_element Protonation General Medicine Phosphate Ion
Zdroj:	ChemInform. 23
ISSN:	0931-7597
DOI:	10.1002/chin.199217014
Popis:	The extraction of molybdenum(VI) by tri-n-butyl phosphate (TBP) or a 50% TBP-cyclohexane mixture from 1.0 M NaClO4 medium has been investigated as a function of molybdenum concentration at various approximately constant pH values in the range 1.0–2.0. A satisfactory description of the extraction system could be obtained by computer treatment of the data when all the relevant protonation and condensation equilibria in both phases were taken into account. In the pH range investigated the existence of two large polyanions in the aqueous phase has been confirmed, i.e. [Mo36O112(OH2)16]8− and most probably [Mo18O56]4−. Formation constants have been calculated for these ions and also for some other species which agree well with values previously determined by other methods.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5dd1a1eda29ac6ec3a13e8f73373d4b7 https://doi.org/10.1002/chin.199217014 Zobrazit plný text záznamu Plný text