K 93 Kurbatova, L. D. Joint extraction of vanadium(V) and vanadium(IV) with di(2-ethylhexyl) hydrogen phosphate [Text] / L. D. Kurbatova, D. I. Kurbatov // Russian Journal of Applied Chemistry. - 2008. - Vol. 81, № 3. - P497-499 : il. - Bibliogr. : p. 499 (11 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ВАНАДИЙ ПЯТИВАЛЕНТНЫЙ -- ЭКСТРАКЦИЯ ВАНАДИЯ -- ДИЭТИЛФОСФАТЫ Аннотация: The organic extracts formed in joint extraction of vanadium(V) and vanadium(IV) with di(2-ethylhexyl) hydrogen phosphate from weakly acidic aqueous solutions were characterized by IR and electronic spectroscopy and chemical analysis Полный текст |
K 93 Kurbatova, L. D. Extractable oxo complexes of vanadium(V) with di(2-ethylhexyl) hydrogen phosphate [Text] / L. D. Kurbatova, D. I. Kurbatov // Russian Journal of Applied Chemistry. - 2007. - Vol. 80, № 12. - P2028-2030 : il. - Bibliogr. : p. 2030 (10 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ОКСОКОМПЛЕКСЫ ВАНАДИЯ -- ВАНАДИЙ ПЯТИВАЛЕНТНЫЙ -- ЭКСТРАКЦИЯ ВАНАДИЯ -- ФОСФАТЫ Аннотация: Extraction of vanadium(V) with di(2-ethylhexyl) hydrogen phosphate from 1.0 -8.0 M aqueous sulfuric acid solutions was studied. The optimal conditions for the extraction were found. The composition of the extractable complex was determined, and the reaction equation for the extraction of V(V) was established. The extraction constant was determined Полный текст |
K 93 Kurbatova, L. D. Spectrophotometric determination of scandium with chlorocyanoformazan [Текст] / L. D. Kurbatova, D. I. Kurbatov // Zavodskaya Laboratoriya, Diagnostika Materialov. - 2006. - Vol. 72, № 9. - С. 18-20 Рубрики: ХИМИЧЕСКИЕ НАУКИ |
K 93 Kurbatova, L. D. Extraction recovery of vanadium(V) from sulfuric acid solutions [Text] / L. D. Kurbatova, D. I. Kurbatov // Russian Journal of Applied Chemistry. - 2006. - Vol. 79, № 5. - P850-852 : il. - Bibliogr. : p. 852 (10 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ЭКСТРАКЦИЯ ВАНАДИЯ -- СЕРНАЯ КИСЛОТА -- ВАНАДИЙ ПЯТИВАЛЕНТНЫЙ Аннотация: The IR and electronic absorption spectra of di-2-ethylhexyl hydrogen phosphate (HDEHP) extracts of vanadium(V) and sulfuric acid and of vanadium(V) solutions in sulfuric acid were studied. The composition of the extractable complex was determined, and the equation of vanadium(V) extraction with HDEHP was suggested. The equilibrium constant of vanadium(V) extraction from concentrated sulfuric acid solutions was found Полный текст |
K 93 Kurbatova, L. D. Vanadium(V) complexes in sulfuric acid solutions [Текст] / L. D. Kurbatova, D. I. Kurbatov // Zhurnal Neorganicheskoi Khimii. - 2006. - Vol. 51, № 5. - С. 908-910 Рубрики: ХИМИЧЕСКИЕ НАУКИ |
K 93 Kurbatova, L. D. Mechanism of extraction of vanadium(V) from sulfuric acid solutions with di-2-ethylhexylphosphoric acid [Text] / L. D. Kurbatova, D. I. Kurbatov, N. I. Medvedeva // Russian Journal of Applied Chemistry. - 2004. - Vol. 77, № 4. - P676-679. - Bibliogr. : p. 679 (10 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ВАНАДИЙ ПЯТИВАЛЕНТНЫЙ -- ЭКСТРАКЦИЯ ВАНАДИЯ -- СЕРНАЯ КИСЛОТА Аннотация: IR and electronic absorption spectroscopies were applied to a study of the mechanism of extraction of vanadium(V) with di-2-ethylhexylphosphoric acid from sulfuric acid solutions Полный текст |
K 93 Kurbatova, L. D. Vanadium(V) Complexes in Hydrochloric Acid Solutions / L. D. Kurbatova, T. I. Polupanova, D. I. Kurbatov // Russian Journal of Applied Chemistry. - 2002. - Vol. 75, № 8. - P1216-1218 : il. - Bibliogr. : p. 1218 (10 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ХЛОРИСТОВОДОРОДНАЯ КИСЛОТА -- ПЯТИВАЛЕНТНЫЙ ВАНАДИЙ Аннотация: 51V NMR, electronic, and vibrational spectroscopies were applied to study the ionic state of vanadium(V) in hydrochloric acid solutions at cHCl = 1.0311.3 M and vanadium(V) concentration of 1 M Полный текст |
K 93 Kurbatova, L. D. Extraction Recovery of Vanadium(IV) from Acid Sulfate Solutions with Di-(2-ethylhexyl)phosphoric Acid / L. D. Kurbatova, D. I. Kurbatov // Russian Journal of Applied Chemistry. - 2010. - Vol. 83, № 6. - P1093-1095 : il. - Bibliogr. : p. 1095 (8 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ЭКСТРАКЦИЯ ВАНАДИЯ -- СЕРНАЯ КИСЛОТА -- РАСТВОРЫ СЕРНОЙ КИСЛОТЫ Аннотация: Extraction of vanadium(IV) with di-(2-ethylhexyl)phosphoric acid from acid sulfate solutions in the presence of sodium sulfate was studied. The composition of the complex being extracted was found, and the equation of the extraction reaction was determined. The equilibrium constant of the reaction by which vanadium(IV) is extracted with di-(2-ethylhexyl)phosphoric acid was found by taking into account the complexation of vanadium(IV) in acid sulfate solutions Полный текст |
K 93 Kurbatova, L. D. Vanadium(V) Complexes in Sulfuric Acid Solutions / L. D. Kurbatova, D. I. Kurbatov // Russian Journal of Inorganic Chemistry. - 2006. - Vol. 51, № 5. - P841-843 : il. - Bibliogr. : p. 843 (4 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ПЯТИВАЛЕНТНЫЙ ВАНАДИЙ -- СЕРНАЯ КИСЛОТА Аннотация: The ionic state of vanadium(V) is studied spectrophotometrically over a wide range of sulfuric acid concentrations from 1.0 to 16.8 mol/l. Existence regions for monomeric and dimeric vanadium(V) complexes are determined. The equilibrium constant of vanadium(V) dimerization in 12 M H2SO4 is determined Полный текст |
K 93 Kurbatova, L. D. Vanadium(V) Extraction from Sulfuric Acid Solutions / L. D. Kurbatova, D. I. Kurbatov // Russian Journal of Inorganic Chemistry. - 2008. - Vol. 53, № 7. - P1154-1157 : il. - Bibliogr. : p. 1157 (10 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ВАНАДИЙ ПЯТИВАЛЕНТНЫЙ -- СЕРНАЯ КИСЛОТА Аннотация: We studied vanadium(V) extraction by di-2-ethylhexylphosphoric acid (DEHPA) from 1.0–12.0 M sulfuric acid. Optimal extraction parameters were determined. IR, 5V NMR, and electronic spectroscopy was used to determine the stoichiometry of the extracted complex and the reaction equation for vanadium(V) extraction by DEHPA. The equilibrium constant of vanadium(V) extraction by DEHPA was determined Полный текст |