Abstract
A new reagent, undecanoic acid N,N-diethylhydrazide, was synthesized, and its pK a1 was determined. The reagent recovers Cu(II) to 99–100% from solutions whose acidity ranges from pH 6 to 1 M NH3. Copper(II) is extracted in the form of a neutral complex of the composition Cu(II):reagent = 1:2. The reagent is incorporated in the complex in the deprotonated form. An equation for the extraction of Cu(II) from ammonia solutions was suggested. The extraction isotherm was constructred. Ammonium salts, when present in solution, considerably decrease the degree of copper extraction. The reagent is less efficient extractant of copper than N,N-diethylbenzhydrazide.
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Original Russian Text © V.Yu. Gusev, A.V. Radushev, G.S. Bogomazova, T.D. Batueva, 2008, published in Zhurnal Obshchei Khimii, 2008, Vol. 78, No. 3, pp. 385–388.
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Gusev, V.Y., Radushev, A.V., Bogomazova, G.S. et al. Extraction and complexation of Cu(II) with undecanoic acid N,N-diethylhydrazide. Russ J Gen Chem 78, 368–371 (2008). https://doi.org/10.1134/S1070363208030055
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DOI: https://doi.org/10.1134/S1070363208030055