1070-4272/05/7809-1416+2005 Pleiades Publishing, Inc.
Russian Journal of Applied Chemistry, Vol. 78, No. 9, 2005, pp. 1416 !1419. Translated from Zhurnal Prikladnoi Khimii, Vol. 78, No. 9,
2005, pp. 1440!1443.
Original Russian Text Copyright + 2005 by Tin’gaeva, Zil’berman.
AND ION-EXCHANGE PROCESSES
Synthesis and Properties of Organomineral Sorbents
E. A. Tin’gaeva and M. V. Zil’berman
Perm State Technical University, Perm, Russia
Ekologiya Ural Research Institute, Perm, Russia
Received December 27, 2004; in final form, May 2005
Abstract-Composite sorbents including an active inorganic component and a polymeric binder were ob-
tained. The effect of various factors on their sorption and strength properties was studied.
The high selectivity, heat resistance, and radiation
stability of ion-exchange materials based on sparingly
soluble inorganic compounds make such sorbents
suitable for selective recovery of components from
multicomponent solutions with the aim of utilization
of these components or purification of process solu-
tions and wastewater .
The possibility of effective use of inorganic ion-
exchange materials is largely determined not only by
their chemical properties, but also by the hydromech-
anical stability of granulates. As a rule, a sufficient
hydromechanical stability of inorganic ion-exchange
materials is achieved by creating composites , with
inorganic materials commonly used as binders or
Table 1 shows that a high mechanical stability of
a material is, as a rule, provided by a significant de-
crease in the fraction of the active component in the
An analysis of published evidence concerning the
technology of polymeric materials and concepts of
how stresses arise in granulated ion-exchange materi-
als in their deformation  led to a conclusion that
organic polymers can also be used as binders.
Here we describe fundamentals of a method for
synthesis of organomineral sorbents, which yields
granulates of inorganic sorbents with a content of the
active component in a formulation exceeding 80 wt %,
and report on certain properties of the ion-exchange
The technique developed consists in the following.
A suspension containing a polymer solution and a
powdered inorganic sorbent is dispersed into a pre-
cipitant. The polymer is cured by washing-out the
solvent from a drop of a suspension of the powdered
inorganic component in a polymer solution, which is
close to the known [wet] method for forming of
synthetic and artificial fibers. The use of this method
makes it possible to combine the processes of for-
mulation curing and grain forming.
Some linear polymers, including perchlorovinyl
(PCV), ABS plastics, and cellulose acetate, were
tested as organic binders. These substances are well
soluble in organic solvents, sufficiently wear-resistant,
Water was used as a precipitant. This imposed
certain requirements on the choice of a solvent for the
polymer: this solvent should be fully miscible with
Acetone, dimethylformamide, and dimethylacet-
amide were tested as solvents meeting these require-
Hexacyanoferrates(II) and (III) of transition metals
and hydrated titanium and aluminum oxides were
used as active inorganic components.
The sorption properties of the organomineral
Table 1. Comparison of different techniques for produc-
tion of granulates of inorganic ion-exchange materials
³ Fraction of the ³Mechanical
³active component, %³ strength
Impregnation into ³ Up to 20 ³ High 
finished supports ³³
Drying ³ 100 ³ Low 
Coprecipitation with ³ Uo to 50 ³ High 
silica gel ³³
Sol!gel method ³ Up to 30 ³ High