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Sulfuric acid alkylation of isobutane with olefins in a microemulsion medium in the presence of dimethyldioctadecyl ammonium salt
https://doi.org/10.18412/1816-0387-2025-3-76-89
Abstract
The formation of Winsor III microemulsion in concentrated H2SO4 + C4-C6 alkanes system was detected for the first time with the addition of a quaternary ammonium salt, dimethyl-dioctadecyl-ammonium chloride (C18H37)2N+(CH3)2Cl-, as a surfactant. The effect of this microemulsion formation on the parameters of the sulfuric acid alkylation reaction of isobutane (iB) with 1-butene (1b) and 1-pentene (1p) was studied. The addition of only 0.03 wt. % of surfactant to H2SO4 resulted in a sharp change in many process parameters relative to the process using pure H2SO4: an increase in isobutane conversion by 1.5-2 times, the yield of C8 products by olefin up to 2 times, and the RON reaching 100 points. Using the NMR method, it was determined that after the alkylation reaction of isobutane with 1-butene in the presence of a microemulsion, the amount of acid-soluble oils (ASO) formed decreases by 15-20 times compared to unmodified acid.
About the Authors
A. V. Nikityonok
Boreskov Institute of Catalysis, Novosibirsk
Russian Federation
Russian Federation
D. P. Ivanov
Boreskov Institute of Catalysis, Novosibirsk
Russian Federation
Russian Federation
D. E. Babushkin
Boreskov Institute of Catalysis, Novosibirsk
Russian Federation
Russian Federation
A. O. Kuzmin
Boreskov Institute of Catalysis, Novosibirsk
Russian Federation
Russian Federation
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For citations:
Nikityonok A.V., Ivanov D.P., Babushkin D.E., Kuzmin A.O. Sulfuric acid alkylation of isobutane with olefins in a microemulsion medium in the presence of dimethyldioctadecyl ammonium salt. Kataliz v promyshlennosti. 2025;25(3):76-89. (In Russ.) https://doi.org/10.18412/1816-0387-2025-3-76-89
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