Flotation Extraction of Copper and Zinc Ions with N-Nonanoyl-N'-Methanesulfonylhydrazine.

Patterns of the preconcentration of Cu(II) and Zn(II) ions from aqueous solutions with N-nonanoyl-N'-mesylhydrazine by ion flotation are studied depending on the initial concentration of the coligends, pH of the solution, conditioning time, and temperature. Based on the data of IR spectroscopy and elemental analysis, an assumption is made about the composition of the floated compounds. It is shown that the extraction of Zn(II) significantly depends on the initial concentration of the metal and the time of solution conditioning. A decrease in the recovery of the studied ions with increasing solution temperature is established; for Cu(II) this effect is more pronounced. The kinetics of the process is described using a classical first-order model; the obtained values of flotation constants for Zn(II) ions are fivefold higher than those for Cu(II). The conditions for the selective separation of Cu(II) ions under collective flotation conditions are determined. [ABSTRACT FROM AUTHOR]