ISSN 1070-4272, Russian Journal of Applied Chemistry, 2016, Vol. 89, No. 6, pp. 880−885. © Pleiades Publishing, Ltd., 2016.
Original Russian Text © A.V. Radushev, V.N. Vaulina, A.V. Kharitonova, L.G. Chekanova, V.Yu. Gusev,
2016, published in Zhurnal Prikladnoi Khimii, 2016,
Vol. 89, No. 6, pp. 719−724.
INORGANIC SYNTHESIS AND INDUSTRIAL
Direct Extraction of Nickel from Model Sulfate Solution
with Hydrazide of Versatic tert-Carboxylic Acids
A. V. Radushev, V. N. Vaulina, A. V. Kharitonova*, L. G. Chekanova, and V. Yu. Gusev
Institute of Technical Chemistry, Ural Branch, Russian Academy of Sciences, ul. Akademika Koroleva 3, Perm, 614013 Russia
Received May 23, 2016
Abstract—Possibility of direct extraction of 0.66 g L
Ni(II), 0.048 g L
Co(II), and 0.024 g L
Zn(II) in the
presence of the nine commonly accompanying elements from a model solution for underground sulfuric acid
leaching of an oxidized Ni ore with a 0.4–0.6 M solution of a hydrazide of Versatic C
acids in kerosene was
considered. The optimal conditions of extraction, extract washing to remove impurities, and re-extraction of Ni
and Co were determined. It was found that the direct extraction of up to 90% of nickel, cobalt, and zinc is pos-
sible with an at least ﬁ vefold concentration in the extraction stage. The separation of Ni from Co and co-extracted
Fe, Zn, and Mn is possible in the re-extraction stage by washing of the organic phase with a 0.5 M HCl solution.
About 70% of the world’s resources of Ni and Co
are contained in oxidized nickel ores not subject to the
conventional processing methods . Hydrometallurgical
methods are suitable for these ores, which include as
the ﬁ rst stage the ammoniac dissolution of preliminarily
calcined ores (Caron process), or the sulfuric acid
autoclave leaching (HPAL process) . The production
solutions obtained in these ways are processed by
complex multistage schemes, e.g., Canse , Murrin
Murrin , Bulong , etc.
Direct methods for collective extraction of nickel and
cobalt from leaching solutions (which can separate Ni and
Co from the main impurities: Mn, Mg, Ca) are economi-
cally preferable. To these belong the Goro process [5, 6]
with the use of Cyanex 301  and techniques employing
synergetic mixtures of reagents [4, 8–11].
Hydrazides of tert-carboxylic acids C
have been suggested for extraction of nickel in the
presence of accompanying metals from acid media
In this communication, we report on preliminary
studies of the recommended new extractive agents ,
as applied to hydrazides of Versatic tert-carboxylic acids
of the fraction C
The model solution for underground sulfuric acid
leaching of oxidized Ni or contained (g L–1): Ni
15; pH ~ 0.5.
The solution was
prepared from calculated weigh portions of metal sulfates
of pure and chemically pure (CaCl
grades and 93% conc. H
of chemically pure grade.
Prior to being used, the solution was ﬁ ltered through a
paper ﬁ lter.
The QUIK 59 extractive agent based on hydrazides
of tert-carboxylic acids of the C
general formula R
at the laboratory of organic complexing agents
(Institute of Technical Chemistry, Ural Branch, Russian
Academy of Sciences) by reacting a hexane solution of
chloroanhydrides of acids of the C
from Versatic 1019 , with an excess amount of a
solution of hydrazine hydrate in isopropanol, added under
cooling with ice. After salt precipitates were removed
The solution composition was recommended by Ural Geotechnological
Company OOO (Yekaterinburg).