Volume 02 Issue 04-2022
25
International Journal of Advance Scientific Research
(ISSN
–
2750-1396)
VOLUME
02
I
SSUE
04
Pages:
25-28
SJIF
I
MPACT
FACTOR
(2021:
5.478
)
(2022:
5.636
)
METADATA
IF
–
7.356
A
BSTRACT
It is known that adsorption events, as a rule, occur in a liquid medium containing different categories of
substances, are not inert in terms of composition and properties of the medium, and are directly involved
in these processes. Here, the main component is the adsorbent, which is selected depending on the nature
of the liquid to be cleaned, the polarity of the substances to be removed, their concentration, and so on. In
addition, such processes in heterogeneous systems are mainly regulated by the properties of the
adsorbents used and the technological parameters of their operation.
K
EYWORDS
Activated clay adsorbents, acid activation of clays, local activated clays, highly active adsorbents.
Journal
Website:
http://sciencebring.co
m/index.php/ijasr
Copyright:
Original
content from this work
may be used under the
terms of the creative
commons
attributes
4.0 licence.
Research Article
THE CURRENT STATE OF TECHNOLOGIES FOR THE
PRODUCTION AND ACTIVATED CLAY ADSORBENTS
Submission Date:
March 29, 2022,
Accepted Date:
April 10, 2022,
Published Date:
April 21, 2022
Crossref doi:
https://doi.org/10.37547/ijasr-02-04-05
Salikhanova Dilnoza Saidakbarovna
Doctor of Technical Sciences, Professor, Chief Researcher, Institute of General and Inorganic Chemistry of
the Academy of Sciences of the Republic of Uzbekistan
Khakimov Akmaljon Akhmedovich
Doctor of Philosophy in Technical Science, Associate Professor, Fergana Polytechnic Institute, Fergana,
Uzbekistan
Dadaboev Abdusalom Abdusattor o‘g‘li
Master's degree student, Fergana Polytechnic Institute, Fergana, Uzbekistan
Volume 02 Issue 04-2022
26
International Journal of Advance Scientific Research
(ISSN
–
2750-1396)
VOLUME
02
I
SSUE
04
Pages:
25-28
SJIF
I
MPACT
FACTOR
(2021:
5.478
)
(2022:
5.636
)
METADATA
IF
–
7.356
I
NTRODUCTION
Adsorption phenomena occur, as a rule, in a liquid
medium containing substances of different
classes; the medium is not inert in composition
and property and is directly involved in these
processes. Here, the main component is the
adsorbent, which is selected based on the nature
of the liquid to be purified, the polarity of the
substances to be removed, their concentration,
etc. [1-4].
Moreover, such processes carried out in
heterogeneous systems are mainly regulated by
the properties of the adsorbents used and the
technological parameters of their functioning.
Adsorption methods for cleaning liquids, in
particular vegetable oils, are widely used in many
countries, where they mainly use their own local
activated clays [5-8].
Today, the purchase and transportation of
imported activated clays to oil and fat enterprises
is expensive for hard currency, which in turn
increases the cost of manufactured goods. Taking
this into account, the President of the Republic set
a number of tasks for the branches of the
country's economy on import substitution of raw
materials and resources for local raw materials.
It is known that not all natural clays exhibit high
adsorption activity in their natural form. For
example, the high content of sesquioxides in
bentonite clays does not allow obtaining highly
active adsorbents. Even the removal of various
forms of moisture does not contribute to the
production of active adsorbents for oil
purification [9-13]. Therefore, one should initially
study the compositions and properties of natural
clays potentially suitable for obtaining
adsorbents.
T
HE MAIN PART
Despite the presence in the Republic of more than
100 large deposits of natural clays (kaolin,
bentonite, palygorskite, etc.), there is no
production of activated adsorbents on an
industrial scale. In this regard, it is necessary to
study the compositions and properties of natural
clays suitable for obtaining adsorbents, and
especially the methods and technologies for their
enrichment and activation, including non-
traditional ones. In recent years, non-traditional
methods of activating clay adsorbents have
appeared, involving the use of IR, microwave
radiation, etc. [14-19].
So, for example, IR radiation from clay adsorbents
mainly contributes to the activation of their
surface. Such rays are mostly absorbed in very
small amounts [20-22]. Another method,
microwave radiation, instead of convective
heating of clays, radiates them with an object,
which certainly affects the structure and porosity
of the inner layer of the obtained adsorbents [3].
There is a method [5] for thermal activation of
clays using microwave radiation.
However, it is not effective enough. does not affect
the chemical composition of the resulting
Volume 02 Issue 04-2022
27
International Journal of Advance Scientific Research
(ISSN
–
2750-1396)
VOLUME
02
I
SSUE
04
Pages:
25-28
SJIF
I
MPACT
FACTOR
(2021:
5.478
)
(2022:
5.636
)
METADATA
IF
–
7.356
adsorbents. Unfortunately, no works on acid
activation of clays using microwave radiation
have been found in the literature. The patented
method [4] of microwave heating of clay
adsorbents is carried out by their dry heating at a
temperature of 450-550 ℃.
However, such activation of natural bentonites
and palygorskites does not provide the necessary
depth of adsorption purification of vegetable, for
example, cottonseed or safflower oils.
C
ONCLUSION
Therefore, further study of the possibilities of
using microwave radiation to obtain directionally
activated adsorbents from local bentonites and
palygorskites should be considered relevant.
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