METHODS FOR CONVERTING HEAVY AROMATIC COMPOUNDS INTO BTX AND CATALYTIC COMPOSITIONS USED IN THEM Russian patent published in 2021 - IPC B01J29/68 B01J29/72 B01J29/76 B01J29/12 B01J29/14 B01J29/22 B01J29/24 B01J29/26 B01J29/44 B01J29/46 B01J29/48 B01J29/74 B01J29/76 B01J29/78 B01J29/80 

FIELD: chemistry.

SUBSTANCE: method is proposed for converting raw materials containing aromatic C₈₊ hydrocarbons into lighter aromatic products, including stages of obtaining a processed catalytic composition, by a method including the stages of: (a) obtaining a catalytic composition containing zeolite mesoporous mordenite, wherein the specified zeolite mesoporous mordenite has a mesopore surface area of more than 30 m²/g, and the specified zeolite mesoporous mordenite contains agglomerates consisting of primary crystallites, where the specified primary crystallites have an average size of primary crystals, determined by transmission electron microscopy, of less than 80 nm, and an aspect ratio less than 2; (b) introducing the specified catalytic composition into interaction with the source of the first metal or its compounds and with the source of the second metal or its compounds to obtain a metal-containing catalytic composition, where the specified first metal is molybdenum, or tungsten, or a mixture thereof; where the specified second metal is cobalt, or nickel, or a mixture thereof, where the specified metal-containing catalytic composition contains from 0.001 to 20.0 wt. % of the specified first metal and from 0.001 to 20.0 wt. % of the specified second metal, all values expressed in wt. % are given per mass of the catalytic composition; and (c) processing the specified metal-containing catalytic composition with a sulfur source and/or a steam source to obtain the specified processed catalytic composition, introducing the specified raw materials and, optionally, hydrogen into the reaction in the presence of the specified processed catalytic composition under conversion conditions effective for dealkylation and re-alkylation of the specified aromatic C₈₊ hydrocarbons and obtaining the specified lighter aromatic products, including benzene, toluene and xylene.

EFFECT: improved method for converting raw materials containing aromatic C₈₊ hydrocarbons into lighter aromatic products, such as xylene.

11 cl, 7 tbl, 10 ex