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Section 7. Technical sciences
https ://doi.org/10.29013/AJT-20-9.10-44-46
Sobirjonov Rakhmatjon Rustambek ugli, PhD student, Academy of Sciences of the Republic of Uzbekistan Institute of General and inorganic chemistry
Khamidov BositNabiyevich, Doctor of technical Sciences, Professor, Academy of Sciences of the Republic of Uzbekistan Institute of General and inorganic chemistry
Khujakulov Aziz Fayzullayevich, PhD student, Academy of Sciences of the Republic of Uzbekistan Institute of General and inorganic chemistry, c. Tashkent
E-mail: raximov2021@inbox.ru
PRODUCTION OF THE OPTIMAL VERSION OF A PILOT BATCH OF PLASTICIZER OIL IN THE CONDITIONS OF THE FERGANA REFINERY
Abstract. In this work, the optimal version of the pilot batch of plasticizer oil was produced from the extract of Ill-pogon in the conditions of the Fergana oil refinery. Keywords:
At present, in the oil and gas industry of the Republic of Uzbekistan, special attention is paid to the priority areas of oil and gas chemistry in order to implement industries that produce products with high added value, in particular, in this area there are opportunities for obtaining new types of products -polystyrene, polyethylene terephthalate, synthetic rubbers based on aromatic hydrocarbons (benzene, toluene, xylene), using the technology for producing olefins from methanol, as well as increasing the production of polyethylene and polypropylene.
According to the analysis of the state of work on plasticizers, petroleum oils and products based on them are widely used in the tire industry as plasti-
cizers and softeners of rubber compounds, and in terms of the total volume of use they occupy the third place after rubbers and carbon black [1]. Petroleum plasticizers are especially widely used in the production of styrene butadiene rubbers and tire rubbers, into which petroleum oils are introduced in large quantities (20-50 mass parts or more per 100 mass parts of polymer). The viscoelastic, low-temperature strength properties of rubbers, as well as wear resistance, shrinkage, adhesion, tendency to vulcanization, and workability largely depend on the composition of the plasticizer [2].
The following requirements are imposed on the substances used as plasticizers: they must be well
PRODUCTION OF THE OPTIMAL VERSION OF A PILOT BATCH OF PLASTICIZER OIL IN THE CONDITIONS OF THE FERGANA REFINERY
combined with the polymer, have low vapor pressure, high chemical resistance, heat and light stability, not dissolve in water, detergent solutions, oils. In addition, they should be colorless, odorless, tasteless, non-toxic, non-flammable and, most importantly, inexpensive. A universal plasticizer that would have all of the listed properties does not yet exist. Depending on the field of application of the polymer and the requirements imposed, either one or a mixture of plasticizers is introduced into the composition of their compositions [3].
At present, the industry of the leading capitalist countries, as well as the neighboring countries, produces more than 40 types of plasticizers, about 100 more are produced in small quantities for special purposes. Of the large number of compounds, esters of various acids are most often used as plasticizers for polymeric materials. In particular, the longer the alkyl chain, the greater the effectiveness of dialkyl esters of phthalic acid; branched esters have a weaker plasticizing effect than linear ones. Plasticizers are
also polymeric compounds, for example copolymers of isobutylene-butadiene-acrylonitrile, isobutyl-ene-acrylonitrile-methyl methacrylate, butadiene-acrylate, butadiene with carbonyl-containing compounds, polymeric esters of unsaturated carboxylic acids, copolymers of unsaturated acid ester dicarbox-ylic esters and polyethers of dicarboxylic acid esters. Plastics of this group are distinguished by extremely low volatility and provide frost resistance and elasticity of products [4].
We have carried out work on the manufacture of a pilot batch of plasticizer oil. The preparation process for this pilot batch consisted of the following stages:
- preparation of the components of the residual extract and the extract of the Ill-shoulder strap;
- purification of oil extracts with liquid propane;
- mixing of components.
Samples from pilot production batches were taken and analyzed from the installation 36/1, the quality characteristics of which are shown in( table 1):
Table 1.
No. The name of indicators Residual extract Extract III-shoulder
1. Kinematic viscosity at 100 °C, sSt 20.61 8.21
2. Flash point, °C 250 194
3. Refractive index at 50 ° C 1.5100 1.4920
5. Density at 20 ° C, kg/m3 936 922
6. Pour point, °C 34 25
7. Sulfur content,% mass. 1.80 1.85
8. Aniline point, °C 72.2 66.7
The prepared samples are shown in (table 2):
Table 2.
Component name Sample 1 Sample 2 Sample 3
Fraction III extract 10% 15% 20%
Residual extract I 90% 85% 80%
The quality of the prepared plasticizer samples is in (table 3):
Table 3.
No. The name of indicators Plasticizer oil
Norm Laboratory samples
No. 1 No. 2 No. 3
1. Kinematic viscosity at 100 °C, mm2/s (sSt) 16-23 19.53 18.25 15.27
2. Refractive index at 50 ° C 1.5080-1.5280 1.5110 1.5030 1.5010
3. Density at 20 ° C, kg/m3 927-967 934 927 923
4. Pour point, °C not higher than 30 32 30 28
5. Closed Cup Flash Point, ° C not lower than 220 245 235 224
6. Sulfur content,% mass. no more than 3.0 1.8 1.75 1.79
7. Aniline point, °C 64-72 71.8 69.5 67.4
As a result of the tests, it was found that the obtained laboratory samples of the plasticizer oil meet the requirements of the standard indicators.
Thus, an experimental batch of plasticizer oil obtained under laboratory conditions of the Fer-
gana refinery can be recommended for transfer to operational tests in the production of rubber products. Scientific and practical work in this direction continues.
References:
1. Information bulletin "Raw materials and materials of the tire industry".- Moscow, LLC "Institute of the tire industry", 2011.- 194 p.
2. Markova L. M. Research of oil refined products as plasticizers of rubbers and rubbers. Dissertation for the degree of candidate of technical sciences. MIOC and GP them. I. M. Gubkin. 1964.- 242 p.
3. Rabinovich V. Yu. Use of plasticizers for rubber and rubber-based resin. Dissertation for the preparation of a scholarly degree of technical science candidates. MIOC and GP them. I. M. Gubkin. 1975.- 306 p.
4. Erman Burak, James E. Mark, Roland C. Michael. The Science and Technology of Rubber.Fourth edition. Academic Press. 2013.- 256 p.
