Composition and structure of zirconium complexes in tributyl phosphate extracts of Zr from concentrated nitric acid solutions

Journal Article · Tue Mar 01 04:00:00 EST 1994 · Journal of Structural Chemistry

DOI:https://doi.org/10.1007/BF00753573· OSTI ID:147129

Stoyanov, E S; Chizhevskaya, S V; Chekmarev, A M

Using quantitative difference IR spectroscopy the authors have found that the tributyl phosphate extracts of zirconium from 12-15 M HNO{sub 3} contain ionic associates [(TBP){sub 2}H{sup +}]Zr(NO{sub 3}){sub 5}{sup -} (I) and [TBP{center_dot}H{sub 3}O{sup +} (H{sub 2}O){sub n}]Zr(NO{sub 3}){sub 5}{sup -} (II), where n = 1,2, as well as Zr(NO{sub 3}){sub 4}(TBP){sub 2} complex at a lower concentration than (I) and (II). The equilibrium I {r_reversible} II is shifted toward II at higher C{degrees}{sub HNO{sub 3}} and lower C{sub Zr}{degrees}. The structure of associates I and II is discussed.

• Sponsoring Organization: USDOE
• OSTI ID: 147129
• Journal Information: Journal of Structural Chemistry, Journal Name: Journal of Structural Chemistry Journal Issue: 5 Vol. 34; ISSN JSTCAM; ISSN 0022-4766
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
ABSORPTION SPECTROSCOPY
CHEMICAL COMPOSITION
EXTRACTION
MOLECULAR STRUCTURE
TBP
ZIRCONIUM COMPLEXES