TECHNOLOGICAL DESIGN OF THE ALKYLATION PROCESS OF AROMATIC COMPOUNDS BY ALKENES IN THE PRESENCE OF ACID CATALYSTS BASED ON IONIC FLUIDS

A.S. Klimenko, D.V. Andreev, S.A. Prikhodko, I.V. Tertishnikov, N.Yu. Adonin
DOI: 10.25699/SSSB.2019.27.37201 Download PDF
Abstract: The relevance of the work is due to the need to create a more environmentally friendly and cost-effective technology for the alkylation of aromatic compounds without need additional stages of purification of the final product. The aim of the work is to study the process of alkylation of benzene with octene-1 using an acidic catalyst based on an ionic liquid and to determine the necessary criteria for the implementation of this process on a pilot scale. The use of a mixture of dialkyl imidazolium salts and anhydrous aluminum chloride as an alkylation catalyst makes it possible to suppress the processes of tar formation and laborious purification of the final product. A kinetic analysis was carried out and the values of the activation energy and the preexponential factor of the studied reaction were found. The effect of mass transfer on the starting materials to the surface of the catalyst drop is shown and the conditions under which this effect does not change are determined. In addition, to ensure the required hydrodynamic conditions in the medium used. The calculations performed gave similar results to the results obtained experimentally on a prototype of a device with a volume of 0.5 liters with six-blade agitation and a divider.
Index terms: alkylation of aromatics, dialkylimidazolium ionic liquids, liquid Lewis acid, aluminum chloride, acidic catalyst, chemical engineering.

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