Scientific research results in pandemic conditions (COVID-19)
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4. Age psychology: childhood, adolescence, youth: anthology: Textbook
for ped. universities. - M.: Academy, 2011.-624 p.
5. Craig G. Development Psychology (Transl. From English) - St.
Petersburg, 2010, 987 p.
6. Kulagina I.Yu., Kolyutsky V.N. Age Psychology: Human Development
from Birth to Late Maturity: A Textbook for High Schools.-M.: Yurayt, 2011.-
464 p.
Hojieva Rukhsora, Tilloev Lochin, Bakieva Shakhnoza, Toshboev
SardorBukhara Engineering Technological Institute,
DEFINITION OF INDICATORS IN OXIDE ALUMINUM, USED IN GAZOVICH
CHEMICAL PROCESSING COMPLEX
R. Hojieva, L. Tilloev, Sh. Bakieva, S. Toshboev
Abstract: In this case, the Shurtan gas-chemical complex during the
production of polyethylene, gives the characteristics of aluminum oxide
used in the purification of polyethylene from the residues of Sigler-Natta
catalysts.
Keywords: used alumina, purification of polyethylene, Sigler-Natta
catalysts, adsorption, adsorbed.
In today's fast-paced world, the use of natural resources by people is
increasing day by day. Developing fast Today our main goal is to use natural
resources wisely and pass them on to future generations. Currently, the level
of use of natural resources by man is growing day by day. Therefore, the
deep processing of every raw material extracted from the earth, It is our
responsibility for generations to create waste-free technologies and prevent
damage to nature by various wastes [1].
There are several changes in the form of alumina (Al
2
O
3
), the most
important of which are 𝛼 = 𝐴𝑙
2
𝑂
3
𝛾 = 𝐴𝑙
2
𝑂
3
𝜃 = 𝐴𝑙
2
𝑂
3
𝑘 = 𝐴𝑙
2
𝑂
3
γ -form
is thermally processed from hydrates alumina, bermite (Al
2
O
3
H
2
O) and
hydrargillite (Al
2
O
3
3H
2
O) are taken from thermal processing 𝛾 = 𝐴𝑙
2
𝑂
3
becomes 𝛼 = 𝐴𝑙
2
𝑂
3
as a result of heating. 𝛼 = 𝐴𝑙
2
𝑂
3
is extremely stable and
forms a corundum mineral. Corundum is a white crystalline substance that
crystallizes in a rhombohedral lattice. Its hardness is 9 on the Mohs scale,
and it liquefies at 2046
0
С [2].
Alumina is widely used in the chemical and petrochemical industries as
an adsorbent for drying and purifying gaseous and liquid chemicals (Fig. 1),
as a catalyst spreader, and in other industries.
Scientific research results in pandemic conditions (COVID-19)
26
In the technological processes of the Shurtan gas chemical complex,
along with the production of products, various wastes are generated. One
such waste is alumina. In the complex, alumina is used as a cleaning
adsorbent. It serves for purification (adsorption) of the residues of Sigler-
Natta catalysts participating in the polymerization reaction in the
polyethylene production workshop.
The average consumption is 6.170 kg of aluminum oxide adsorbent for
the production of 1 ton of polyethylene. Aluminum oxide waste forms about
600-800 tons per year (Fig. 2)
Fig. 1. Alumina cleaning adsorbent.
Fig. 2. Used waste aluminum oxide.
Some of the physical properties of the alumina used in this study were
determined using the following research methods:
The fractionation of the used aluminum oxide granules by size
according to the diameter of the balls, sieving in standard sieves in
accordance with the requirements of GOST 6613-73 and the corrosion
resistance of the granules were determined in accordance with the
requirements of GOST 16188-70.
For adsorbents, the concept of fictitious, probable, and actual densities
is used. Breast density is determined in the laboratory using a measuring
cylinder, probable density is determined using a symbolic porometer, and
actual density is determined pycnometrically.
Laboratory results were determined by dividing the probabilities and
actual densities of the used alumina by placing them in separate expressions
characteristic of the three densities. The results of the study are shown in
Table 1.
Table 1
Physical properties of used alumina.
№
Indicators
unit of measurement
Amounts
1.
The form
-
Spherical
2.
Colour
-
Black, gray, yellow
Scientific research results in pandemic conditions (COVID-19)
27
3.
Diameter (Ball size
is)
mm (
)
2÷5
4.
The composition of the granules in diameter
4.1.
2÷3 mass within
mass. %
26
4.2.
3÷4 mass within
mass. %
37
4.3.
4÷5 mass within
mass. %
33
4.4.
Masses less than 2
and more than 5
mass. %
4
5.
Pellet density
5.1.
Saturated Density
g / cm
3
0,88
5.2.
Probable density
g / cm
3
2,79
5.3.
Actual density
g / cm
3
3,68
6.
Strength
Decomposition
%
72
The results of the work can be used as a starting point in the design of
equipment and devices used in the processing of used aluminum oxide to
obtain secondary products from it.
References:
1.
Тиллоев Л.И., Дўстов Ҳ.Б. Сариқ мой ва ундан ажратиб олинган
фракцияларнинг сифат кўрсаткичларини аниқлаш // Фан ва
технологиялар тараққиёти: Кимё ва кимёвий технологиялар: Илмий-
техникавий журнал. 2019. №4, 63-68 бетлар.
2.
Н.А.Парпиев, А.Г.Муфтахов, Ҳ.Р.Раҳимов “Анорганик кимё” Олий
ўқув юртларининг кимё ихтисослиги бўйича таълим олувчи
талабалари учун дарслик- Т: “Ўзбекистон” 2003, 504 б
Abror Kabulov , PhD in Economics, Associate Professor, Dean of Economy
and Business Faculty of Plekhanov Russian University of Economics in
Tashkent, Uzbekistan
Feruza Sidikova, Senior Lecturer, Dean of Digital Economy and Finance
Faculty of Plekhanov Russian University of Economics in Tashkent,
Uzbekistan
ROLE OF THE QUALITY OF EDUCATION IN NATIONAL ECONOMY OF THE
REPUBLIC OF UZBEKISTAN
A. Kabulov, F. Sidikova
Abstract: Quality of education is acquiring primary importance as it is a
central problem of education system throughout the world today. Growing
