CATALYST, METHOD FOR PRODUCING AND METHOD transalkylation of benzene with diethylbenzene with its use

摘要

FIELD: chemistry.;SUBSTANCE: invention relates to transalkylation catalysts. Described is a catalyst for transalkylation of benzene with diethylbenzenes in form of cylindrical granules with a regular shape, which contains zeolite Y in an acidic H⁺ form, which contains 100 wt % zeolite with degree of substitution of Na⁺ ions with H⁺ ions of not less than 0.95 and more than 80% of volume of the transported pores of the granules is made up of pores with diameter larger than 100 nm. Described is a method of producing said catalyst, which involves preparation of cylindrical granules with a regular shape, involving drying and calcination of the granules, wherein to obtain the catalyst, zeolite NaY, which is granulated with binding material and has high phase purity, wherein more than 80% of the volume of the transported pores is made up of pores with a diameter larger than 100 nm, is successively treated with aqueous solutions of ammonium salts with concentration of 20-25 g/dm³ (with respect to NH₄ ⁺) with the ratio of mass of granules to volume of the solution of (1:6)-(1:7) and temperature of 80-90°C for 1.0-1.5 hours, alternating three or four steps of said treatment with two or three intermediate calcinations, respectively, at temperature of 540-600°C for 3-4 hours, drying at temperature of 120-150°C for 3-4 hours and calcining for 3-4 hours at temperature of 540-600°C. Described is a method for transalkylation of benzene with diethylbenzenes, involving reaction of benzene with diethylbenzenes in liquid phase at high temperature and pressure using said catalyst, wherein content of water in the material is less than 200 ppm.;EFFECT: high conversion of diethylbenzenes.;3 cl, 2 tbl, 10 ex