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Determination of solubility of chlorides of d-elements in chloroaluminate melts

V. V. Karpov, V. A. Volkovich, I. B. Polovov, O. I. Rebrin

Abstract


Solubility of several transition metal chlorides (NiCl2, CrCl2, MoCl3, FeCl2) was measured in KCl-AlCl3 based melts. It was found that the solubility of studied metal chlorides depends on K : Al mole ratio. MoCl3 solubility decreases with increasing AlCl3 content. Solubility of CrCl2 and FeCl2 reaches maximum at K : Al ratio of 1 and decreases when this ratio either de-creases or increases. The dependence of NiCl2 solubility on K : Al mole ratio is V-shaped with the maximum near 0.9-0.95. The effect of temperature on solubility of transition metal chlorides in KCl-AlCl3 melts was also investigated. Increasing temperature does not alter the character of «solubility – K : Al mole ratio» dependences.

Keywords


chloroaluminate melts; nickel chloride; chromium chloride; ferric chloride

References


Gilbert B, Osteryoung RA. Electrochemistry of Ni(II) and the behavior of oxide ions in chloroaluminate melts. J Am Chem Soc. 1978;100(9):2725-30. doi:10.1021/ja00477a026

Brynestad J, Smith GP. Evidence for a three-coordinate complex of nickel(II). J Am Chem Soc. 1970;92(10):3198-9. doi:10.1021/ja00713a054

Oye HA, Gruen DM. Cobalt(II) species in fused chloride solvents. Inorg Chem. 1965;4(8):1173-80. doi:10.1021/ic50030a019

Sandler RA, Larionov AA, Kostyukov AA, Troitskii AL. Behavior of iron in chloroaluminate melts in the presence of metallic aluminum. Russ J Appl Chem. 1984;10:2375.

Posypaiko VI, Alekseeva EA, editors. Diagrammy plavkosti solevykh sistem. Troynyye sistemy [Charts of salt systems' fusion. Triple systems]. Moscow: Chemistry; 1977. 328 p. Russian.

Oye HA, Gruen DM. Octahedral absorption spectra of the dipositive 3d metal ions in molten aluminum chloride. Inorg Chem. 1964;3(6):836-41. doi:10.1021/ic50016a011




DOI: http://dx.doi.org/10.15826/chimtech.2014.1.2.699

Copyright (c) 2014 V. V. Karpov, V. A. Volkovich, I. B. Polovov, O. I. Rebrin

© Chimica Techno Acta, 2014-2019
ISSN 2411-1414 (Online), ISSN 2409-5613 (Print)

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