Separation of tungsten and rhenium on alumina
Апстракт
The conditions for the efficient separation of tungsten(VI) and rhenium (VII) on alumina were established. The distribution coefficients K-d for tunstate and perrhenate anions, as well as the separation factors alpha (alpha = K-dWO4(2-)/K-d ReO4-) were determined using hydrochloric or nitric acid as the aqueous media. A solution of sodium chloride in the pH range 2-6 was also examined. Under all the tested experimental conditions. alumina is a much better adsorbent for tungsten than for rhenium. The obtained results indicated that the best separation of these two elements is achieved when 0.01-0.1 mol dm(-3) HCl or 1.0 mol dm(-3) HNO3 are used as the aqueous media. If NaCl is used as the aqueous phase, the best separation is achieved with 0.20 mol dm(-3) NaCl. pH 4-6. Under these experimental conditions. the breakthrough and saturation capacities of alumina for tungsten at pH 4 are 17 and 26 mg W/g Al2O3. respectively. With increasing pH, these values decrease. Thus, at pH 6 they are o...nly 4 and 13 mg W/g Al2O3, respectively.
Кључне речи:
tungsten / rhenium / separation factor / distribution coefficientИзвор:
Journal of the Serbian Chemical Society, 2004, 69, 8-9, 683-688
DOI: 10.2298/JSC0409683V
ISSN: 0352-5139
WoS: 000224503000010
Scopus: 2-s2.0-30944447241
Колекције
Институција/група
VinčaTY - JOUR AU - Vučina, Jurij L. AU - Lukić, Dragoljub M. AU - Stoiljković, Milovan PY - 2004 UR - https://vinar.vin.bg.ac.rs/handle/123456789/2814 AB - The conditions for the efficient separation of tungsten(VI) and rhenium (VII) on alumina were established. The distribution coefficients K-d for tunstate and perrhenate anions, as well as the separation factors alpha (alpha = K-dWO4(2-)/K-d ReO4-) were determined using hydrochloric or nitric acid as the aqueous media. A solution of sodium chloride in the pH range 2-6 was also examined. Under all the tested experimental conditions. alumina is a much better adsorbent for tungsten than for rhenium. The obtained results indicated that the best separation of these two elements is achieved when 0.01-0.1 mol dm(-3) HCl or 1.0 mol dm(-3) HNO3 are used as the aqueous media. If NaCl is used as the aqueous phase, the best separation is achieved with 0.20 mol dm(-3) NaCl. pH 4-6. Under these experimental conditions. the breakthrough and saturation capacities of alumina for tungsten at pH 4 are 17 and 26 mg W/g Al2O3. respectively. With increasing pH, these values decrease. Thus, at pH 6 they are only 4 and 13 mg W/g Al2O3, respectively. T2 - Journal of the Serbian Chemical Society T1 - Separation of tungsten and rhenium on alumina VL - 69 IS - 8-9 SP - 683 EP - 688 DO - 10.2298/JSC0409683V ER -
@article{ author = "Vučina, Jurij L. and Lukić, Dragoljub M. and Stoiljković, Milovan", year = "2004", abstract = "The conditions for the efficient separation of tungsten(VI) and rhenium (VII) on alumina were established. The distribution coefficients K-d for tunstate and perrhenate anions, as well as the separation factors alpha (alpha = K-dWO4(2-)/K-d ReO4-) were determined using hydrochloric or nitric acid as the aqueous media. A solution of sodium chloride in the pH range 2-6 was also examined. Under all the tested experimental conditions. alumina is a much better adsorbent for tungsten than for rhenium. The obtained results indicated that the best separation of these two elements is achieved when 0.01-0.1 mol dm(-3) HCl or 1.0 mol dm(-3) HNO3 are used as the aqueous media. If NaCl is used as the aqueous phase, the best separation is achieved with 0.20 mol dm(-3) NaCl. pH 4-6. Under these experimental conditions. the breakthrough and saturation capacities of alumina for tungsten at pH 4 are 17 and 26 mg W/g Al2O3. respectively. With increasing pH, these values decrease. Thus, at pH 6 they are only 4 and 13 mg W/g Al2O3, respectively.", journal = "Journal of the Serbian Chemical Society", title = "Separation of tungsten and rhenium on alumina", volume = "69", number = "8-9", pages = "683-688", doi = "10.2298/JSC0409683V" }
Vučina, J. L., Lukić, D. M.,& Stoiljković, M.. (2004). Separation of tungsten and rhenium on alumina. in Journal of the Serbian Chemical Society, 69(8-9), 683-688. https://doi.org/10.2298/JSC0409683V
Vučina JL, Lukić DM, Stoiljković M. Separation of tungsten and rhenium on alumina. in Journal of the Serbian Chemical Society. 2004;69(8-9):683-688. doi:10.2298/JSC0409683V .
Vučina, Jurij L., Lukić, Dragoljub M., Stoiljković, Milovan, "Separation of tungsten and rhenium on alumina" in Journal of the Serbian Chemical Society, 69, no. 8-9 (2004):683-688, https://doi.org/10.2298/JSC0409683V . .