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Extraction and Separation of Tantalum(V) with 3-Hydroxy-2-methyl-1-(4-tolyl)-4-pyridone

Vlasta Vojković ; Laboratory of Analytical Chemistry, Faculty of Science, University of Zagreb, Strossmayerov trg 14, 10000 Zagreb, Croatia
Astrid Gojmerac lvšić ; Laboratory of Analytical Chemistry, Faculty of Science, University of Zagreb, Strossmayerov trg 14, 10000 Zagreb, Croatia
Biserka Tamhina ; Laboratory of Analytical Chemistry, Faculty of Science, University of Zagreb, Strossmayerov trg 14, 10000 Zagreb, Croatia

Puni tekst: engleski, pdf (4 MB) str. 667-677 preuzimanja: 73* citiraj
APA 6th Edition
Vojković, V., Gojmerac lvšić, A. i Tamhina, B. (1997). Extraction and Separation of Tantalum(V) with 3-Hydroxy-2-methyl-1-(4-tolyl)-4-pyridone. Croatica Chemica Acta, 70 (2), 667-677. Preuzeto s https://hrcak.srce.hr/176965
MLA 8th Edition
Vojković, Vlasta, et al. "Extraction and Separation of Tantalum(V) with 3-Hydroxy-2-methyl-1-(4-tolyl)-4-pyridone." Croatica Chemica Acta, vol. 70, br. 2, 1997, str. 667-677. https://hrcak.srce.hr/176965. Citirano 25.02.2021.
Chicago 17th Edition
Vojković, Vlasta, Astrid Gojmerac lvšić i Biserka Tamhina. "Extraction and Separation of Tantalum(V) with 3-Hydroxy-2-methyl-1-(4-tolyl)-4-pyridone." Croatica Chemica Acta 70, br. 2 (1997): 667-677. https://hrcak.srce.hr/176965
Harvard
Vojković, V., Gojmerac lvšić, A., i Tamhina, B. (1997). 'Extraction and Separation of Tantalum(V) with 3-Hydroxy-2-methyl-1-(4-tolyl)-4-pyridone', Croatica Chemica Acta, 70(2), str. 667-677. Preuzeto s: https://hrcak.srce.hr/176965 (Datum pristupa: 25.02.2021.)
Vancouver
Vojković V, Gojmerac lvšić A, Tamhina B. Extraction and Separation of Tantalum(V) with 3-Hydroxy-2-methyl-1-(4-tolyl)-4-pyridone. Croatica Chemica Acta [Internet]. 1997 [pristupljeno 25.02.2021.];70(2):667-677. Dostupno na: https://hrcak.srce.hr/176965
IEEE
V. Vojković, A. Gojmerac lvšić i B. Tamhina, "Extraction and Separation of Tantalum(V) with 3-Hydroxy-2-methyl-1-(4-tolyl)-4-pyridone", Croatica Chemica Acta, vol.70, br. 2, str. 667-677, 1997. [Online]. Dostupno na: https://hrcak.srce.hr/176965. [Citirano: 25.02.2021.]

Sažetak
Extraction of tantalum(V) from aqueous oxalic solution with 3 hydroxy- 2-methyl-1-(4-tolyl)-4-pyridone (HY) dissolved in chloroform
has been examined at different acidities and ionic strengths. Tantalum( V) is quantitatively extracted with HY from oxalic solution
at pH = 2.3-2.5, probably as a mixed ligand Ta-oxalate-HY complex.
Tantalum(V) can be quantitatively extracted even from a more acidic solution in the presence of sulphuric, hydrochloric or perchloric acids, in the acidity range from pH = 2.3 to 3.5 M H2S04 or HCI and from pH = 2.3 to 5.5 M HCI04. Thiocyanate, perchlorate and chloride ions produce a synergistic effect on the tantalum(V) extraction with HY. In the presence of an excess of thiocyanate, perchlorate or chloride ions, tantalumtV) is quantitatively extracted with HY in the acidity range from pH = 2.3 to 3.5 M H2S04 as a mixed ligand Ta-NCS-HY, Ta-CI04-HY or in the form of Ta-CI-HY complexes. Compositions of the complexes are studied and discussed. Tantalum(V) extraction with HY enables its separation from niobium(V), zirconium(IV) and hafnium(IV).

Hrčak ID: 176965

URI
https://hrcak.srce.hr/176965

Posjeta: 137 *