ISSN 1070-4272, Russian Journal of Applied Chemistry, 2015, Vol. 88, No. 6, pp. 1009−1014. © Pleiades Publishing, Ltd., 2015.
Original Russian Text © V.Yu. Prokof’ev, N.E. Gordina, 2015, published in Zhurnal Prikladnoi Khimii, 2015, Vol. 88, No. 6, pp. 912−918.
AND ION EXCHANGE PROCESSES
Use of Ultrasonic Treatment for Obtaining a Sorbent
Based on Zinc Compounds and Gibbsite
V. Yu. Prokof’ev and N. E. Gordina
Research Institute of Thermodynamics and Kinetics of Chemical Processes,
Ivanovo State University of Chemistry and Technology, Sheremetevskii pr. 7, Ivanovo, 153000 Russia
Received June 18, 2015
Abstract—Processes occurring in ultrasonic treatment of aqueous suspensions of gibbsite and zinc oxide of
basic zinc carbonate were studied. It was found that, in treatment of suspensions of gibbsite and zinc oxide, ZnO
particles become coarser, whereas in mixtures of gibbsite and Zn
O, articles of basic zinc carbonate
are dispersed. The size of gibbsite particles in both formulations remains nearly unchanged. It was shown that
a preliminary ultrasonic treatment of sorbent components make it possible to raise the static capacity for HCl
vapor. It was found that Zn
O (mixture with zinc oxide) or Zn
O (mixture with basic zinc
carbonate) is formed in this case, which leads to a higher sorption capacity of the latter.
Chemisorbents based on formulations composed of
zinc, aluminum, calcium, etc. compounds are widely used
for ﬁ ne puriﬁ cation of technological and exhaust gases
[1, 2]. As a rule, these sorbents are synthesized by hydro-
thermal methods [3–5] and sol-gel processes [6, 7]. To
prepare sorbents absorbing hydrochloric or hydroﬂ uoric
acid vapor, a mechanochemical activation of mixtures of
gibbsite and zinc and calcium compounds has been used
[8–10]. In this case, a preliminary activation serves to im-
prove the mechanical strength of sorbent granules .
One of effective ways to modify the solid phase is by
ultrasonic treatment of suspensions . For example,
a sorbent for absorption of ﬂ uorine compounds was de-
scribed in , prepared from aluminum hydroxide sub-
jected to ultrasonic treatments. It was noted that a treat-
ment of this kind can shorten the time required for ob-
taining the sorption system and raise the capacity of the
The goal of our study was to examine the processes
occurring in the stage in which a sorbent is prepared from
gibbsite and zinc oxide or basic zinc carbonate for ab-
sorption of hydrochloric acid vapor with an ultrasonic
treatment of an aqueous suspension of the starting com-
As starting components served: Al(OH)
about 100% gibbsite (Gb), basic zinc carbonate (BZC)
containing 96.7 wt % Zn
O, and ZnO pro-
duced by calcination of basic zinc carbonate at 500°C.
We prepared for study mixtures of Gb and ZnO and Gb
and BZC, all with an Al
: ZnO molar ratio of 1 : 1.
Water was added to the resulting mixture to S : L = 1 : 1.
The suspension was subjected to an ultrasonic treatment
(UST) in a UZDN-2T installation for 10 min at oscil-
lation frequency of 22 kHz and concentrator-end am-
plitudes of 8 and 16 μm. The treated suspension was
used to mold grains with diameter of 3 mm, dried at
An X-ray analysis of the samples was made on a
DRON-3M diffractometer with CuK
radiation. The size
of the coherent scattering region (CSR) and the root-
mean-square microstrains (MS) were calculated from the
reﬂ ection broadening by the procedure described in .
The scanning electron microscopy (SEM) was performed
with a JSM-6460 LV microscope.
IR spectra of the samples were obtained with an
AVATAR 360 FTIR Fourier spectrometer.