Effect of steric hindrance of the amidic substituents of the carbamoylmethylphosphine oxides on third phase formation
- Argonne National Lab., IL (United States)
Increasing the steric hindrance of the substituents on the amidic nitrogen of the carbamoylmethylphosphine oxide class of extractants leads to a significant decrease in the tendency of these compounds to form a third phase during the extraction of nitric acid. An increase in steric hindrance leads to a reduction in the accessibility of the nitrogen and in the dipole-dipole and dipole-induced-dipole attractions between extractant molecules, thereby reducing the tendency to form a third phase. A corresponding increase in the amount of uranium that could be extracted without third phase formation was not observed due to a reduction in the interaction of the extractant with the diluent because of coordination with the metal ion by both polar groups. 11 refs., 2 figs., 3 tabs.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 171436
- Journal Information:
- Solvent Extraction and Ion Exchange, Journal Name: Solvent Extraction and Ion Exchange Journal Issue: 3 Vol. 11; ISSN 0736-6299; ISSN SEIEDB
- Country of Publication:
- United States
- Language:
- English
Similar Records
Origin of anomeric effect: A density functional steric analysis
The Affinity of Certain Disubstituted Amides and Organophosphorus Compounds for Water1