Zobrazeno 1 - 10
of 38
pro vyhledávání: '"V. G. Maiorov"'
Publikováno v:
Theoretical Foundations of Chemical Engineering. 50:781-784
The purification of niobium from antimony impurity via extraction with tributyl phosphate from solutions of the HF + NH4F mixture has been studied. It has been established that at an HF + NH4F content equal to 7–16 mol/L and an NH4F concentration o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::457c6577bb3fde2316c9b70d7f007b63
https://doi.org/10.1134/s0040579516050158
https://doi.org/10.1134/s0040579516050158
Publikováno v:
Theoretical Foundations of Chemical Engineering. 50:547-553
The conditions of tantalite (Congo deposit) and the decomposition of columbite (Zashikhinsk deposit) using an HF and H2SO4 mixture when heated to 80°C have been found. The extraction of Ta and Nb into solutions achieved levels of more than 99% and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a8bb566ee3090e1292133c0b348cef50
https://doi.org/10.1134/s0040579516040175
https://doi.org/10.1134/s0040579516040175
Publikováno v:
Theoretical Foundations of Chemical Engineering. 49:536-539
The effect of the concentrations of HF and H2SO4 and organic-to-aqueous phase ratio Vo : Vaq on the distribution of Sb and Nb in their extraction with tributyl phosphate has been studied. It has been determined that, under the best conditions (HFfree
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6386124d8e23f13b5e8d80bfef199f16
https://doi.org/10.1134/s0040579515040156
https://doi.org/10.1134/s0040579515040156
Autor:
Sergey V. Krivovichev, Elena S. Zhitova, V. K. Kopkov, V. G. Maiorov, M. P. Rys’kina, A. I. Nikolaev
Publikováno v:
Russian Journal of Inorganic Chemistry. 59:172-177
The effects of KOH and K2CO3 concentrations in the solution and temperature on the solubilities of K7[HNb6O19] · 10H2O and K8 [Nb6O19] · 16H2O are studied. The structure of K7[HNb6O19] · 13H2O is established.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::89ad2bd23f3beda8beb33f90f0403c9c
https://doi.org/10.1134/s0036023614030152
https://doi.org/10.1134/s0036023614030152
Publikováno v:
Theoretical Foundations of Chemical Engineering. 47:480-483
This report deals with the effects of the HF and H2SO4 concentrations and the organic-to-aqueous phase ratio Vorg: Vaq on the distribution of Ta, Nb, and Sb in their extraction with tributyl phosphate and n-octanol from model solutions that are simil
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::09895cb86b83bd13963025cb18c25ec1
https://doi.org/10.1134/s004057951304012x
https://doi.org/10.1134/s004057951304012x
Publikováno v:
Russian Journal of Inorganic Chemistry. 58:474-480
19F and 21Sb NMR spectroscopy and chemical analysis were used to study the composition and structure of fluoride complexes of antimony(V) and tantalum(V) in organic and aqueous phases in extraction by tributyl phosphate (TBP) and n-octanol. It is fou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::025f425073dd0753aa09f60b7edff68c
https://doi.org/10.1134/s0036023613040074
https://doi.org/10.1134/s0036023613040074
Publikováno v:
Russian Journal of Applied Chemistry. 86:108-111
Leaching with water of products obtained by sintering of Nb2O5 with K2CO3·1.5H2O, KHCO3, and KOH was studied. Solutions containing up to 500 g l−1Nb2O5 were obtained. These solutions can be recommended for use in production of welding and other fu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c55697bc66a8611c57fa7e3fd2017e5
https://doi.org/10.1134/s1070427213010199
https://doi.org/10.1134/s1070427213010199
Autor:
V. K. Kopkov, N. L. Mikhailova, O. A. Zalkind, G. I. Kadyrova, V. G. Maiorov, V. Ya. Kuznetsov, A. I. Nikolaev
Publikováno v:
Russian Journal of Applied Chemistry. 85:1820-1826
Solutions containing 500 g L−1 Nb2O5 were obtained by sintering Nb2O5 with potash followed by leaching with water. The potassium niobate released from niobium(V) alkaline solutions was examined with an application of methods of physical and chemica
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::164f48b4a808a2f257275be849d64691
https://doi.org/10.1134/s1070427212120051
https://doi.org/10.1134/s1070427212120051
Publikováno v:
Theoretical Foundations of Chemical Engineering. 46:563-566
Concentrated alkali solutions of niobium containing up to 238 g/L of Nb2O5 have been obtained by sintering of Nb2O5 with K2CO3 · 1.5 H2O. These solutions are recommended for use in the production of welding and other functional materials.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c02002dfcd0a5bf579ed8c7c9abf67f
https://doi.org/10.1134/s0040579512050065
https://doi.org/10.1134/s0040579512050065
Publikováno v:
Atomic Energy. 111:185-194
The state of mineral reserves of thorium-bearing raw materials from the Kola Peninsula and other regions of Russia and the Commonwealth of Independent States is examined. Schemes for secondary extraction of thorium during processing of the most acces
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::64510bd741d8552db4d3e416bde481d6
https://doi.org/10.1007/s10512-012-9474-0
https://doi.org/10.1007/s10512-012-9474-0