Russian Journal of Applied Chemistry, 2013, Vol. 86, No. 2, pp. 206−213.
Pleiades Publishing, Ltd., 2013.
Original Russian Text © I.V. Shulyak, E.I. Grushova, 2013, published in Zhurnal Prikladnoi Khimii, 2013, Vol. 86, No. 2, pp. 223−231.
IN HETEROGENEOUS SYSTEMS
Flotation Activity of Polymer Anionic Surfactants
in the Case of Flotation Desliming of Sylvinite Ore
I. V. Shulyak and E. I. Grushova
Belarusian State Technological University, Minsk, Belarus
e-mail: IlyaSh@tut.by, Grushova.email@example.com
Received November 26, 2012
Abstract—Ethoxylated anionic polymer surfactants were suggested as collectors for a sludge ﬂ otation. The
mechanism of ﬁ xing anionic surfactants on the clay-carbonate slimes was examined by FTIR spectroscopy and
Flotation of sylvinite ore is distinguished by some
features that are caused by similar physical and chemi-
cal properties of salt minerals separated (KCl and NaCl),
high content, and high-depressing effect of clay impuri-
ties, and also by using a saturated salt solution as liquid
phase, which changes the surface and bulk properties of
The most complete selective hydrophobization of
sylvite is performed by ionic reagents, mainly cationic:
primary aliphatic amines C
The presence in the system of negatively charged
clay-carbonate particles [insoluble residue (IR)], which
are characterized by a high surface area and adsorptive
activity for cationic amines, has a suppressive effect on
the ﬂ otation. Therefore, in case of the potassium-ore ﬂ ota-
tion IR from ore should be removed as a rule by ﬂ otation
(the sludge ﬂ otation). The more separability of IR in the
process, the less the losses of potassium chloride with
froth product, and, hence, KCl recovery by ﬂ otation will
be more effective.
Many agents are known, which are suggested to use as
a collector for the sludge ﬂ otation: the collector OS-20,
ethoxylated fatty acids, monooctadecyl ester, eicosa-
ethylene glycol, Hydropol-200, ethoxylated primary and
secondary alkyl amines [2–6].
Non-ionic reagents containing more than 7 ethylene
oxides in the molecule, anionic substances in the form of
a mixture of salts of carboxylic acids, exhibit best collec-
tive properties on the sludge ﬂ otation.
Alekseeva et al.  suggested using ethoxylated
amines as collectors on the sludge ﬂ otation from sylvinite
ore. An effect of an amount of ethylene oxides in mol-
ecule was examined on the efﬁ ciency and selectivity of
the sludge ﬂ otation and it was found that with increasing
the amount of ethylene oxides the growth in the ﬂ otation
activity of a collector was observed and selectivity of
the sludge ﬂ otation was improved. The best results were
achieved in the case of using ethoxylated amine contain-
ing 30 moles of ethylene oxide.
However, in these studies little attention was paid to
consideration of a mechanism of the collective action
of reagents. Moreover, almost none of them have been
widely used in industry for several reasons: for example,
because of the relatively high cost, insufﬁ cient separabil-
ity of IR, harmful effects on the environment, etc.
The goal of the study was to investigate the ﬂ otation
activity of a series of new ﬂ otation collectors for the
sludge ﬂ otation and consideration of the likely mechanism
of their action.
The polymer anionic surfactants (AS) were tested
as collectors of sludge were tested (Table 1). For this