Extraction of molybdenum(VI) from hydrochloric acid solutions by triisoocytlamine in organic diluents
The influence of the diluents, carbon tetrachloride, 1,2- dichlorobenzene, and 1,2-dichloroethane, on the extraction of Mo(VI) by triisooctylamine from HCl solutions of high acidity was investigated. The extraction was almost 100 percent complete from acidic solutions of low [H$sup +$] with a decrease in the extraction coefficient from 10$sup -2$ to 2M HCl implying successive protonation of anionic species to give HMo$sub 4$$O$$sup -$$sub 13$ or a complex metal acid such as H$sub 2$Mo$sub 4$$O$$sub 13$, the formation of cationic species HMo$sub 2$$O$$sub 6$$sup +$ which does not extract, and the cationic chloride complex MoO$sub 2$Cl$sup +$. Extraction isotherms were determined for the various systems. In organic solutions saturated with Mo(VI), the ratio of the concentrations of R$sub 3$N, Mo(VI), and Cl remains virtually constant at 2:1:4 and was independent of the diluent, amine concentration, and the acidity. Studies were made to determine the composition of the Mo(VI) compound extracted by the amine chloride in which the organic phase was far from saturated with Mo(VI), and spectrophotometric data indicated that the formula (R$sub 3$NH$sup +$$)$$sub 2$MoO$sub 2$Cl$sub 42$$sup -$ best described the extracted complex. (BLM)
- Research Organization:
- Univ. Nationale du Zaire, Campus de Kinshasa
- NSA Number:
- NSA-33-028407
- OSTI ID:
- 4089605
- Journal Information:
- Inorg. Chem., v. 15, no. 3, pp. 722-725, Other Information: Orig. Receipt Date: 30-JUN-76
- Country of Publication:
- United States
- Language:
- English
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