EXTRACTION OF FE (III) AND IN (III) FROM AQUEOUS HC1 BY TRI-N-OCTYLAMINE IN NITROBENZENE,
Abstract
A study was made of the distribution of Fe(III) and In(III) between aqueous HC1 and solutions of tri-noctylamine (TOA) in nitrobenzene at trace metal concentrations and under metal loading conditions. The equilibrium between tri-n-octylamine and HC1 was also investigated. The equilibrium constant for the reaction TOA + (HC1) = TOAC H1 was found to be 560,000 over the amine salt concentration range .0017 to .095M; TOAHC1 appears to be an essentially undissociated ion pair in nitrobenzene. The metal extraction data were interpreted in terms of the extraction of the tetrachloro metal anions. The possibility of the addition of one or more amine hydrochlorides to the extracted metal species must also be considered; these 'extra hydrochlorides' are not bound directly to the metal but, rather, are the result of electrostatic interactions. The results give not only an interesting example of the effect of organic phase ionization on the distribution ratio, but also emphasize the hazards of drawing conclusions concerning the metal species extracted from equilibrium extraction data. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 21, 1964
- Accession Number
- AD0615073
Entities
People
- Arin D. Nelson
- J. L. Fasching
- R. L. Mcdonald
Organizations
- North Dakota State University