Russian Journal of Applied Chemistry, 2013, Vol. 86, No. 3, pp. 355−359.
Pleiades Publishing, Ltd., 2013.
Original Russian Text © A.G. Kasikov, V.N. Petrov, A.M. Petrova, 2013, published in Zhurnal Prikladnoi Khimii, 2013, Vol. 86, No. 3, pp. 384−388.
OF SYSTEMS AND PROCESSES
Extraction of Vanadium(V) from Acid Solutions
with Octyl Alcohol Isomers
A. G. Kasikov, V. N. Petrov, and A. M. Petrova
Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials,
Kola Scientiﬁc Center, Russian Academy of Sciences, Apatity, Russia
Received April 17, 2012
Abstract—Vanadium(V) extraction with octyl alcohol isomers from acid solutions was studied. Two areas are
determined, wherein the vanadium(V) extraction in relation to acidity of the aqueous phase is maximal. The
opposite effects of temperature on the extraction are found. The mechanism of the vanadium(V) extraction with
high molecular weight alcohols from weakly acid solutions was suggested.
The most widely used method of the vanadium(V)
extraction from process solutions is liquid extraction.
Previously, as extractants were used amines, organophos-
phorous extractants, alcohols, ketones, and extractant
High molecular weight aliphatic alcohols are cheap
and accessible reagents showing promise as industrial
extractants . The published data on the vanadium(V)
extraction with alcohols mainly belong to the use of acid
solutions with с(H
) > 1 M [1–4, 6]. At the same time,
the possibility to extract vanadium(V) from weakly acid
solutions with secondary fatty alcohols C
demonstrated in [7-10], with process has not been studied in
detail. This area of concentrations has the greatest practical
signiﬁ cance, since dilute H
solutions are commonly
used for vanadium leaching from concentrates and wastes.
In addition the extraction properties of alcohols depend on
their structure [5, 11]. However, the inﬂ uence of this factor
on the process has not been studied in detail.
The study is concerned with the extraction of
vanadium(V) from acid solutions with octanols of varied
1-Octanol was produced at the Vekton Closed Joint-
Stock Company (Russia), as well as 2-octanol and
“97.8%, for synthesis” 2-ethyl hexanol-1 (iso-octanol)
available from Merck were used as extractants without
further dilution, if not speciﬁ ed otherwise. Table 1 lists
the selected physicochemical properties of the organic
Prior to vanadium(V) extraction, the extractant was
pre-equilibrated with acid reference solution..
Model vanadium(V) solutions were prepared from
initial concentrated solution of ammonium metavanadate
prepared from pure-grade salt, to which the required
, HCl, or HNO
(all chemically pure grade)
was added. The acidity of model solutions was set with
a pH-212 pH meter (Hanna) or by titration.
Extraction was performed in a temperature-controlled
Table 1. The selected physicochemical properties of octyl
alcohol isomers [12, 13]
water, g l
1-Octanol 81 195 0.3 0.826
2-Octanol 71 180 1.1 0.819
Iso-octanol 75 184 1.4 0.834