Abstract
Nitric acid solutions (c Pd up to 3.2 M) with variable HNO3 concentration were studied by electronic spectroscopy, 14N and 17O NMR, acid-base titration, gravimetry, and other methods. Solid phases that precipitated on storing these solutions were studied by X-ray phase analysis, thermogravimetry, and IR spectroscopy. The conditions for stability of particular Pd(II) species were determined, and specific features of aging of such highly concentrated palladium solutions were revealed. A procedure for palladium isolation as [Pd(NH3)4](NO3)2 from nitric acid solutions in 98% yield was developed.
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Original Russian Text © A.B. Venediktov, S.V. Korenev, S.P. Khranenko, S.V. Tkachev, P.E. Plyusnin, S.N. Mamonov, L.V. Ivanova, V.A. Vostrikov, 2007. published in Zhurnal Prikladnoi Khimii, 2007, Vol. 80, No. 5, pp. 716–725.
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Venediktov, A.B., Korenev, S.V., Khranenko, S.P. et al. Properties of nitric acid palladium solutions with a high metal concentration. Russ J Appl Chem 80, 695–704 (2007). https://doi.org/10.1134/S1070427207050023
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DOI: https://doi.org/10.1134/S1070427207050023