METHOD OF PRODUCING CATALYST, CATALYST AND METHOD OF ALKYLATION OF BENZENE WITH ETHYLENE USING ITS Russian patent published in 2024 - IPC B01J37/04 B01J21/12 B01J29/40 

FIELD: catalytic chemistry.

SUBSTANCE: following is proposed: a method of producing a zeolite-containing catalyst for the process of alkylation of benzene with ethylene by mixing powdered zeolite H⁺ZSM-5 with a binder — pseudoboehmite, moulding the resulting mass into granules, drying and calcining them, characterized in that the mixing of zeolite H⁺ZSM-5, having: molar ratio SiO₂:Al₂O₃ equal to (180–240):1, crystal size less than 1 micron and containing Na₂O not more than 0.04 wt.%, with a binder is carried out in the ratio (70–90):(30–10); after calcination, the granules are treated with a solution of hydrochloric acid with a concentration of 0.05–0.20 mol/dm³ at a temperature of 20–50°C for 0.25–1.0 hours, washed with demineralized water, dried again and calcined. A catalyst for the process of alkylation of benzene with ethylene and the use of a catalyst for the alkylation of benzene are also proposed.

EFFECT: simplification of the method of producing the catalyst, as well as an increase in the concentration of the target product — ethylbenzene and a decrease in the concentration of harmful impurities — xylene isomers in the alkylate.

3 cl, 1 tbl, 6 ex