Russian Journal of Applied Chemistry, 2010, Vol. 83, No. 8, pp. 1475−1479.
Pleiades Publishing, Ltd., 2010.
Original Russian Text
A.V. Radushev, D.V. Koltashev, T.Yu. Nasrtdinova, M.G. Shcherban’, L.G. Chekanova, M.D. Plotnikova, 2010, published in
Zhurnal Prikladnoi Khimii, 2010, Vol. 83, No. 8, pp. 1369−1373.
Physical and Chemical Properties
A. V. Radushev
, D. V. Koltashev
, T. Yu. Nasrtdinova
, M. G. Shcherban’
L. G. Chekanova
, and M. D. Plotnikova
Institute of Technical Chemistry, Ural Branch, Russian Academy of Sciences, Perm, Russia
Perm State University, Perm, Russia
Received March 25, 2010
Abstract—Physical and chemical properties of N-(2-hydroxyethyl)alkylamines were studied, isotherms of
a surface tension of homologous series of these compounds on a liquid –gas interface in water and hydrochloric
acid were obtained.
It is known that N-(2-hydroxyethyl) alkylamines
(HEA) are nonionic surfactants ; N-(2-hydroxyethyl)
alkylamines with radicals C
as precipitants for waste water treatment from ions of
Cu(II) . The presence of amine and hydroxyethyl
groups in these compounds opens up prospects for their
use as complexing agents, including surfactant properties.
However, information on their physical and chemical
properties is necessary for practical application of HEA.
In the literature there are only fragmentary data on the
properties of some of the lower representatives of this
The aim of this work was to study the physical and
chemical properties in a HEA series to assess the possi-
bility of using them in the separation and concentration
of metals or as a surfactant.
N-(2-Hydroxyethyl) alkylamines of RNHCH
formula, where R = C
was prepared by a re-
action of monoethanolamine with primary chloroalkanes
according to technique described in :
Cl + NH
ОН + НСl. (1)
The products were puriﬁ ed gradually by washing with
hexane and 2–3 fold recrystallization from a hexane–ethyl
acetate mixture (1 : 1). In the case of the reagent with R =
cleaning was performed by a vacuum distillation.
Identity and purity of compounds were conﬁ rmed by
H NMR spectroscopy and elemental analysis.
An amount of the main substance in the samples was not
less than 96%, it was determined by the potentiometric
titration in an I160M ionomer equipped with glass and
silver chloride electrodes. We dissolved a weighted por-
tion of the sample (0.1 g) in 20 ml of ethanol, then we
added 16 ml of distilled water and 4 ml of 1 M KCl so-
lution and titrated with 0.1 M aqueous solution of HC1.
Calculation of HEA content (%) was conducted by the
is a volume of hydrochloric solution treated
for titrating (ml); N
, a concentration of the working
solution of HCl (M); М, molecular weight of the appro-
Computation of рK
values of the compounds with
the aid of potentiometric measurements was conducted
by the following equation