The article presents experimental results of the catalytic hydroisomerization of
aromatic hydrocarbons into alkyl naphthenic hydrocarbons. Aluminum col-molybdenum with silicon
oxides has been studied as a catalytic system, which imparts acidic properties to the catalytic system
and stimulates isomerization.
The dehydrogenation reaction of cyclohexane has been studied, which occurs on the active
surface of one of the metal oxides to cyclohexene, then the resulting cycloolefin diffuses to the acidic
active center - aluminosilicate, where skeletal isomerization occurs and then the isomerized
cycloolefin again returns to the active center of the surface of the catalytic system, where it is
hydrogenated to saturated hydrocarbon.
The influences of temperature, pressure, and the rate of transmission of raw materials through
a stationary layer of the catalytic system into the reactors were studied. The optimal parameters for
the catalytic transformations of benzene into methylcyclopentane have been determined: starting at
325°C, with increasing temperature the content of five-membered naphthene increases and the
content of cyclohescane decreases.
By clarifying the influence of pressure, it was determined that the hydroisomerization reaction
with increasing pressure first increases to a maximum and at a value of 8.0 Mn/m2 decreases and at
higher pressures the maximum formation of cyclohexane and methylcyclohexane is observed and it
was found that the amount of decomposition products (pentane and hexane) in the catalyzate at all
parameters are insignificant, i.e. does not exceed 0.5% mass.
For the first time, a comprehensive comprehensive study was carried out on the synthesis with
specified physicochemical and operational parameters in the form of a new catalytic system obtained
with a specified stabilization of activity by introducing technological changes and additives both into
the raw materials and into the composition of the catalyst.
The article presents experimental results of the catalytic hydroisomerization of
aromatic hydrocarbons into alkyl naphthenic hydrocarbons. Aluminum col-molybdenum with silicon
oxides has been studied as a catalytic system, which imparts acidic properties to the catalytic system
and stimulates isomerization.
The dehydrogenation reaction of cyclohexane has been studied, which occurs on the active
surface of one of the metal oxides to cyclohexene, then the resulting cycloolefin diffuses to the acidic
active center - aluminosilicate, where skeletal isomerization occurs and then the isomerized
cycloolefin again returns to the active center of the surface of the catalytic system, where it is
hydrogenated to saturated hydrocarbon.
The influences of temperature, pressure, and the rate of transmission of raw materials through
a stationary layer of the catalytic system into the reactors were studied. The optimal parameters for
the catalytic transformations of benzene into methylcyclopentane have been determined: starting at
325°C, with increasing temperature the content of five-membered naphthene increases and the
content of cyclohescane decreases.
By clarifying the influence of pressure, it was determined that the hydroisomerization reaction
with increasing pressure first increases to a maximum and at a value of 8.0 Mn/m2 decreases and at
higher pressures the maximum formation of cyclohexane and methylcyclohexane is observed and it
was found that the amount of decomposition products (pentane and hexane) in the catalyzate at all
parameters are insignificant, i.e. does not exceed 0.5% mass.
For the first time, a comprehensive comprehensive study was carried out on the synthesis with
specified physicochemical and operational parameters in the form of a new catalytic system obtained
with a specified stabilization of activity by introducing technological changes and additives both into
the raw materials and into the composition of the catalyst.
| № | Имя автора | Должность | Наименование организации |
|---|---|---|---|
| 1 | Xabibullayeva . . | Independent researcher | Tashkent State Technical University |
| 2 | Torayeva .T. | Independent researcher | Tashkent State Technical University |
| 3 | Daminov T.. | Independent researcher | Tashkent State Technical University |
| 4 | Eshmukhamedov M. . | PhD, Professor | Tashkent State Technical University |
| № | Название ссылки |
|---|---|
| 1 | 1. L.S. Glebov, A.G. Zakirova, T.N. Burdeynaya, V.F. Tretyakov, V.A. Matyshak. Nonlinear effects in petrochemistry and organic synthesis on catalyst mixtures. Petroleum Chemistry. 2004, vol. 44, no. 4, pp. 243-254. (in Rus.) 2. I.M. Gerzeliev, M.V. Tsodikov, S.N. Khadjiev. New ways of obtaining isoparaffins - high-octane environmentally safe components of gasoline. Petroleum Chemistry. 2009, vol. 49, no. 1, pp. 3-8. (in Rus.) 3. Likhodobov V.A. Trends in catalyst preparation for oil refining. Russian Congress on Catalysis "ROSCATALYSIS", October 3-7, 2011, Moscow. (in Rus.) 4. Eshmukhamedov M.A., Rakhmatov U.N., Ponomareva T.V. Catalytic hydroisomerization of unsaturated hydrocarbons of coal chemical origin. ONT Society of Science and Creativity 2020, Kazan. Collection “Concepts of modern education: innovation in the system of scientific knowledge.” Materials of the International Scientific-Practical Events of the Society of Science and Creativity (Kazan) February 2020, pp. 323-327. (in Rus.) |
| 2 | 5. Eshmukhamedov M.A., Kavkatbekov M.M., Usmanova R.M., Abduvaliev A.A., Ponomaryova T.V. Alternative sources of hydrocarbon fuel production in the world and Uzbekistan. Issues of Ecology and Environmental Safety. Creation of new polymer materials: collected materials of the VII International ScientificPractical Conference – Minsk: UGZ, 2020, pp. 71-73. (in Rus.) 6. Eshmukhamedov M.A., Oblaberdiev S.B., Khodjibolaev Y.U. Processing of secondary products of the oil industry. Materials of the Republican ScientificTechnical Conference. "Application of innovative technologies and rational operation of oil and gas fields" May 17, 2022. Tashkent-2022. TashSTU, pp. 424-429. (in Rus.) |
| 3 | 7. M.A. Eshmukhamedov, D.K. Musaeva, (Tashkent State Technical University). The mechanism of the conversions of the products of incomplete combustion on the polymetallic adsorption-catalysis-chemosorption system. TSTU named after Islam Karimov. ISSN: 2181- 0400. Technical Science and Innovation, 2019, no. 2(02), pp. 76-82. (in Rus.) 8. N.A. Kadirov, M.A. Eshmukhamedov, O.A. Sheralieva. Production of a drilling agent from tertiary processing waste of aluminum slags. XXIV International Scientific-Practical Conference "Innovation-2019". Collection of scientific articles. Tashkent, September 7, 2019, pp. 220-222. (in Rus.) |
| 4 | 9. N.A. Kadirov, M.A. Eshmukhamedov, M.S. Mirzarakhimov, O.A. Sheralieva, and J.K. Artikova, (2019). "Obtain and Application of Surface-active Substance on the Base of Products Refinement of Cotton Seed Oil." Received: November 25, 2019. Selection and peer review under the responsibility of the AgroSMART 2019 Conference Committee. International Scientific and Practical Conference "AgroSMART - Smart solutions for agriculture," KnE Life Sciences, pp. 937-945. (in Rus.) 10. Eshmukhamedov M.A., Usmanova R.M., Rakhmatov U.N., Ponomaryova T.V. Economically viable opportunities for manganese extraction from the Dautash manganese ore deposit. Scientific-Information Publishing Center "Strategic Studies Institute", Editor-in-Chief – A.N. Zotin. ISSN 2414-9918 Modern Science [Text]: scientific publication journal, March 2020, no. 3 Vol. I, pp. 33-36. (in Rus.) |
| 5 | 11. Safaev M.M., Eshmukhamedov M.A., Khayrullaev P.H. Obtaining oxygenate-hydrocarbon mixtures for targeted purposes. ISSN: 2350-0328. International Journal of Advanced Research in Science, Engineering and Technology Vol. 6, Issue 6, June 2019, pp. 9770-9774. (in Rus.) 12. Safaev M.M., Eshmukhamedov M.A., Abdumazhidov A.I., Khayrullaev P.H. Manganese extraction from the Dautash manganese ore deposit by sulfating with sulfur oxides. Russia, Komsomolsk-onAmur, 2019. (in Rus.) 13. Eshmukhamedov M.A., Safaev M., Catalytic upgrading of hydrocarbon fractions to ensure complete fuel combustion in internal combustion engines. International Conference. Chemistry and dedicated to the 100th anniversary of NUUz. Modern innovations: chemistry and chemical technology of acetylene compounds. Petroleum Chemistry. Catalysis. NUUz, 2018, pp. 37-38. (in Rus.) |
| 6 | 14. Eshmukhamedov M.A., Kadyrova F.M. Hydrogenation of unsaturated hydrocarbons of coal chemical origin on a nickel catalyst. 16th International Scientific-Practical Conference on Ecology and Safety Issues "Far East Spring - 2018", Komsomolsk-on-Amur, Russia, April 27, 2018, pp. 128-131. (in Rus.) 15. Eshmukhamedov M.A., Safaev M., Abdumazhidov A., Mukhiddinov B. Economic and environmental opportunities for manganese extraction from low-grade ores using acidic industrial waste gases. International Scientific-Practical Conference. Collection of scientific articles. Tashkent, 2018. "Innovation-2018." TashSTU. Center for Strategic Innovations and Informatization of NGMK. Uzbek Branch of the International Academy of Sciences of Higher Education. pp. 65-66. (in Rus.) |
| 7 | 16. Sadullaeva M., Eshmukhamedov M.A., Oblaberdiev S.B. Thermocatalytic method for obtaining fuels from secondary products of the oil and gas industry. Ministry of Higher Education, Science and Innovation of the Republic of Uzbekistan, Tashkent State Technical University named after Islam Karimov. International Scientific-Practical Conference on "Relevant problems in natural sciences and innovative technologies." April 4-5, 2024. Tashkent. www.conference.umumkimyo.uz. pp. 348-352. (in Rus.) 17. Baratova M.K., Khabibullaeva R., Eshmukhamedov M.A. Assessment of pollutant emissions from the oil refining industry. Ministry of Higher Education, Science and Innovation of the Republic of Uzbekistan, Tashkent State Technical University namedafter Islam Karimov. International Scientific-Practical Conference on "Relevant problems in natural sciences and innovative technologies." April 4-5, 2024. Tashkent. www.conference.umumkimyo.uz. pp. 360-362. 18. Kadyrov A.A., Alikhanov B.B., Kadyrov N.A., Eshmukhamedov M.A. Emulsion polymer drilling fluid based on a polyacrylamide analogue and phosphogypsum. "Prospects for the development of thermosetting oligomers, polymers containing waste, polyfunctional compounds, and the creation of polymer materials based on them," dedicated to the 80th anniversary of prof. F.A. Magrupov. Collected scientific works of the Republican Scientific-Practical Conference. Tashkent, January 18-19, 2024. Tashkent Chemical-Technology Institute, pp. 140- 142. |
| 8 | 19. Oblaberdiev S., Eshmukhamedov M.A., Khabibullaeva R.M. Investigation of effective methods for wastewater treatment from oil refineries. "Prospects for the development of thermosetting oligomers, polymers containing waste, polyfunctional compounds, and the creation of polymer materials based on them," dedicated to the 80th anniversary of prof. F.A. Magrupov. Collected scientific works of the Republican Scientific-Practical Conference. Tashkent, January 18-19, 2024. Tashkent Chemical-Technology Institute, pp. 156-159. 20. Eshmukhamedov M.A., Urinov U.K., Yusupbaev K.P., Turaeva N., Khabibullaeva R. Investigation of catalysts' activity in the conversion of petroleum hydrocarbons. Ministry of Higher Education, Science and Innovation of the Republic of Uzbekistan, Academy of Sciences of Uzbekistan, JSC "Uzbekneftegaz," LLC "Bukhara Oil Refinery," Uzbekistan Scientific-Engineering Society of the Oil and Gas Industry, Bukhara Engineering-Technology Institute. Collection of materials of the International ScientificTechnical Conference "Problems, innovative proposals, and solutions in the field of chemistry and oil and gas technology" December 14-15, 2023, Bukhara, pp. 441- 443. (in Rus.) 21. Eshmukhamedov M.A., Urinov U.K., Andaev S.R., Turaeva N. Associated petroleum gas mixtures as alternative energy carriers for economic sectors. Ministry of Higher Education, Science and Innovation of the Republic of Uzbekistan, Academy of Sciences of Uzbekistan, JSC "Uzbekneftegaz," LLC "Bukhara Oil Refinery," Uzbekistan Scientific-Engineering Society of the Oil and Gas Industry, Bukhara EngineeringTechnology Institute. Collection of materials of the International Scientific-Technical Conference "Problems, innovative proposals, and solutions in the field of chemistry and oil and gas technology" December 14-15, 2023, Bukhara, pp. 451-454. (in Rus.) 22. Kadyrov A.A., Alikhanov B.B., Eshmukhamedov M.A., Kadyrov N.A. Production of drilling fluids based on secondary chemical raw materials. Vestnik MANEB, Vol. 28, No. 3, 2023. (in Rus.) |