Asymmetric 1,2-diacylhydrazines as reagents for ionic flotation

The physicochemical properties (solubility, acidic-basic equilibria, stability to hydrolysis and oxidation, and kinetics of foam formation) of asymmetric 1,2-diacylhydrazines with the general formula C 6 H 5 C(O)NHNHC(O)R 1 (where R 1 = CH 3 , C 2 H 5 , and C 3 H 7 ) and CH 3 C(O)NHNHC(O)R 2 (where...

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Bibliographic Details
Published in:Russian journal of non-ferrous metals 2010-02, Vol.51 (1), p.8-11
Main Authors: Chekanova, L. G., El’chishcheva, Yu. B., Shcherban’, M. G., Radushev, A. V., Baigacheva, E. V.
Format: Article
Language:English
Subjects:
Ammonia
Asymmetry
Chemistry and Materials Science
Control
Flotation
Foams
Hydrolysis
Materials Science
Metallic Materials
Mineral Processing of Nonferrous Metals
Nonferrous metals
Solubility
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Summary:The physicochemical properties (solubility, acidic-basic equilibria, stability to hydrolysis and oxidation, and kinetics of foam formation) of asymmetric 1,2-diacylhydrazines with the general formula C 6 H 5 C(O)NHNHC(O)R 1 (where R 1 = CH 3 , C 2 H 5 , and C 3 H 7 ) and CH 3 C(O)NHNHC(O)R 2 (where R 2 = C 7 H 15 , C 9 H 19 , and C 10 H 21 ), which are necessary to their evaluation as potential reagents, are investigated. By the example of 1-acetyl-2-octanoylhydrazine, it is shown that the reagents can be used for the removal of ions of Cu(II), Co(II), Ni(II), and Zn(II) ammonia solutions with low metal contents by the ion flotation method. The maximum degree of recovery at pH 9.8 was Cu(II) 88.0, Co(II) 98.0, Ni(II) 99.5, and Zn(II) 95.0. The residual concentration of metal ions corresponds to the regulations for the maximum permissible concentrations of tap water.
ISSN:1067-8212
1934-970X
DOI:10.3103/S1067821210010025