PHYSICAL AND IR-SPECTRAL ANALYSIS OF THE FRACTION SEPARATED FROM THE WASTE OF "UZ-KOR GAS CHEMICAL" JV LLC

ABSTRACT

The results of the study on the physical and IR-spectral analysis of the fraction extracted from the composition of waste hexane – the fraction extracted by driving the secondary product under atmospheric pressure-were studied using the physical as well as the IR-spectral method. Research results on physical and IR-spectral analysis of the fraction isolated from the hexane composition of the waste. Modern methods of physics-chemical analysis, as well as methods of analyzing products corresponding to state (GOST) and world (ASTM) standards, were used for research. The isolated product was found to be soluble in benzole and octane when dissolved in various organic solvents. When the IR spectral result was analyzed, vibrational frequencies were observed for bands of spectrum in the range of 2853-2922 cm^-1 (-CH₃), 1458–1377 cm^-1 (-CH₂), and 721 cm^-1 (-CH₂).

АННОТАЦИЯ

Результаты исследований по физическому и ИК-спектральному анализу фракции, выделенной из состава отработанного гексана – фракции, выделенной путем перегонки вторичного продукта под атмосферным давлением, были изучены с использованием как физического, так и ИК-спектрального метода. Для исследований использовались современные методы физико-химического анализа, а также методы анализа продукции на соответствие государственным (ГОСТ) и мировым (ASTM) стандартам. Установлено, что выделенный продукт при растворении в различных органических растворителях растворяется в бензоле и октане. Также при ИК-спектральном анализе наблюдалась полоса колебаний спектра в диапазоне 2853 - 2922 см^-1 (-СH₃), в диапазоне 1458 – 1377 см^-1 (-СH₂) и в диапазоне 721 см^-1 (-СH₂).

Keywords: IR-spectral, benzol, octane, secondary product, fraction, organic solvent, analysis

Ключевые слова: ИК-спектральный, бензол, октан, вторичный продукт, фракция, органический растворитель, анализ

INTRODUCTION

Today, the chemical and oil-gas industry, which has high production, raw material, scientific and technical potential, is one of the leading basic sectors of the economy of Uzbekistan. The chemical, oil and gas industry, while adding a significant share to the development of the republic's economy, is also sharply increasing its export potential [1-3].

Comprehensive use of natural resources and industrial waste, introduction of the latest modern technologies, production of new competitive goods, deep processing and coordination of local raw materials and other issues are specifically mentioned in the development strategy of the Republic of Uzbekistan for 2022-2026.

In recent years, the chemical industry of Uzbekistan has changed radically - a complete reform has been carried out, the main goal of which is the production of high value-added products based on deep processing of local raw materials. In this direction, the production of new, import-substituting chemical products based on the processing of hydrocarbon raw materials in the republic have particular importance. The country's leadership is paying great attention to the creation of new high-tech chemical industry facilities, such as the Shurtan and Ustyurt gas chemical complexes. These gas chemical complexes allowed the Republic to take the leading positions in the production of polymer products in Central Asia [4-6].

Deep processing of natural gas and rational disposal of technological waste into oil products with improved environmental performance is one of the priority directions of further development of oil and gas processing enterprises.

Increasing demand for hydrocarbons and the ecological crisis occurring on the earth require a deep study of the possibilities of efficient and rational use of hydrocarbon resources. Environmental requirements for hydrocarbons provide an opportunity to process secondary products of the chemical industry, oil and gas processing enterprises.

One of such products is waste hexane, which is released as a liquid secondary product during the polymerization process at the joint venture "Uz-Kor Gas Chemical" LLC.

The main products of the joint venture are high-density polyethylene (YZPE) and polypropylene. High density polyethylene is produced on the basis of Honam Petrochemical Corporation's Mitsui CX technology. This joint enterprise produced polypropylene granules for the first time in our country.

In the complex, the polymerization process is carried out in parallel and serial modes in reactors at low pressure, in the presence of hexane solvent in a medium suspension. The concentration of the suspension formed in the presence of dehydrated hexane, the solvent of ethylene monomer, which is the main raw material, is adjusted, and the catalyst TiCl₄: MgCl₂, and the cocatalyst Al(C₂H₅)₃ (TEAL) solution are continuously fed from the designated place of the reactor at the required speed.

Hexane and polyethylene formed during the polymerization are isolated in the separation section, part of the hexane is returned to the polymerization section, and the rest is sent to the regeneration section.

In this process, in addition to the main polymer product, waste hexane is also formed as a liquid secondary product. The main part of the residual product is paraffins from C₆ to C₂₀, whose qualitative and quantitative composition was determined by chromatography [7].

Based on the fact that waste hexane cannot be processed into a useful product, the investigation of the method of its processing and the development of technology remain an urgent issue for scientists and experts in the field of oil and gas chemistry, and in the field of oil and gas processing.

In this article, the physical properties and IR spectral results of the fraction separated by driving the secondary product formed during polymerization under atmospheric pressure were analyzed [8-10].

RESEARCH OBJECT AND METHODS

As a research object, a sample of the fraction separated by driving under atmospheric pressure of the waste hexane released as a liquid secondary product during the polymerization process at the joint venture of "Uz-Kor Gas Chemical" LLC was used. Modern methods of physico-chemical analysis, as well as methods of analyzing products corresponding to state (GOST) and world (ASTM) standards, were used for research.

RESEARCH RESULTS

IR-spectral studies of our isolated fraction were carried out on IR Affinity-1S SHIMADZU IK Fure spectrometer. The results of the analysis are presented in Figure 1.

Figure 1. IR-spectroscopy analysis of the separated fraction

When the IR-spectral result was analyzed, vibrational frequencies were observed for bands of the spectrum in the range of 2853-2922 cm^-1 (-CH₃), 1458-1377 cm^-1 (-CH₂) and 721 cm^-1 (-CH₂).

In addition, our fraction was dissolved in different solvents and its physical properties were analyzed. The results of the analysis are presented in Table 1.

Table 1.

Results of the analysis are presented

In the above table, it can be seen that the fraction extracted by driving the secondary product formed in the process of polymerization under atmospheric pressure dissolves in benzole and octane.

OBJECTIVE AND CONCLUSION

In the joint enterprise "Uz-Kor Gas Chemical" LLC, the waste hexane released as a liquid secondary product during the polymerization process, separated by driving under atmospheric pressure, has been sufficiently analyzed for its IR-spectral and physical properties by dissolving in various solvents. Comparing the results of the analysis with the information provided in the literature, it was found that the properties of the extracted fraction are similar to the properties of the higher representatives of paraffins. Also, our extracted fraction can be chemically processed and used as a raw material for various industries.

References:

1. Sobir Sayfullaevich VAQQOSOV., Shamsitdin Maxmanovich Xolmuratov., Shuhrat Burievich BUXAROV., Orifjon Sharipovich KODIROV., Xasan Irgashevich KADIROV. KALIIY XLORIDNI FLОTATSION BOYITISH UCHUN SUYUQ PARAFINLAR TARKIBI. ХИМИЯ И ХИМИЧЕСКАЯ ТЕХНОЛОГИЯ https://cce.researchcommons.org/journal – 2020. – №. 18. – С. 20-22.4. Райимов,
2. Исакулова Мукаддас Шукуровна. (2022). ХИМИЧЕСКИЙ СОСТАВ И ПРИМЕНЕНИЕ ТАР ПРОДУКТА ОБРАЗУЮЩЕЙСЯ ПРИ ПИРОЛИЗЕ УГЛЕВОДОРОДОВ. "Экономика и социум" №9(100) 2022.
3. Ахмедов В., Рахматов С. и Олимов Б. (2023). ИЗУЧЕНИЕ ФРАКЦИОННОГО СОСТАВА ОТРАБОТАННОГО ВТОРИЧНОГО ГЕКСАНА ПРОИЗВОДСТВА СП ООО «УЗ-КОР ГАЗ КЕМИКАЛ». Универсум: технические науки, (12-8 (117)), 35-37.
4. Zukhriddin, R., & Sadullo, K. (2023). CHROMATOMATIC MASS ANALYSIS OF DIVINYLACETYLENE DERIVATIVE OF PHTHALIC ANHYDRIDE. Universum: технические науки, (5-8 (110)), 30-33.
5. З. Х. У., & Усмонов, С. Б. (2023). Синтез ароматических полиэфирсульфонкетонов на основе олигосульфонкетонa различного состава и строения. Science and Education, 4(4), 495-502.
6. O’G’Li, R. Z. K., & Qizi, J. N. Q. (2022). Analysis of importance and methods of production of block sopolymers based on polyetylenterephtalate. International Journal of Advanced Technology and Natural Sciences, 3(1), 51-55.
7. Официальный сайт СП ООО «Uz-Kor Gas Chemical» / [Электронный ресурс]. – Режим доступа: http://www.uzkor.com/index.php/ru/deyatelnost.
8. Хайдаров, Б. А. У., Муродова, Ю. М. К., Ботиров, С. Х. У., & Хайитов, Р. Р. (2020). Хроматографический и ИК-спектральный анализ химического состава пиролизного дистиллята. Universum: технические науки, (7-3 (76)), 39-42.
9. Хайдаров, И. Н., Исмаилов, Р. И., & Хасанов, О. Х. (2020). Исследование ИК-спектральных анализов тебунбулакского и модифицированного вермикулита, для получения суспензионного антипирена. Universum: технические науки, (11-4 (80)), 52-57.
10. Дием М., Чирибога Л., Лэш П. и Пасифико А. (2002). ИК-спектры и ИК-спектральные карты отдельных нормальных и раковых клеток. Биополимеры: оригинальные исследования биомолекул, 67 (4–5), 349–353.