RHENIUM-CONTAINING CATALYSTS Russian patent published in 2011 - IPC B01J29/06 B01J29/58 B01J29/80 B01J27/04 C07C6/00 

FIELD: chemistry.

SUBSTANCE: present invention relates to improved catalysts, methods of preparing catalysts and methods for transalkylation of alkylaromatic hydrocarbons using catalysts. Described is a catalyst for transalkylation of alkylaromatic hydrocarbons containing a mordenite component, an acid molecular sieve component MFI, having molar ratio Si/Al₂ less than 40, a rhenium component in range of 0.05-5% of the weight of the catalyst and a dispersing binding agent which is an inorganic oxide. The invention describes a method of preparing a transalkylation catalyst which involves the following steps: a) formation of a catalyst containing a mordenite component, an acid molecular sieve component MFI, having molar ratio Si/Al₂ less than 40, a rhenium component in the range of 0.05-5% of the weight of the catalyst, and a dispersing binding agent which is an inorganic oxide; b) oxidation of the formed catalyst in conditions where atmospheric oxygen is present, temperature lies between 370°C and 650°C and for a period of time between 0.5 and 10 hours; and c) reduction of the oxidised catalyst in a reducing gas containing at least one gas selected from: hydrogen and hydrocarbon, in conditions where temperature lies between 100°C and 650°C. Described also is a method of producing xylene, involving the following steps: bringing a supply stream containing aromatic hydrocarbons, having at least seven carbon atoms, into contact with a catalyst in conditions for converting aromatic hydrocarbons, including presence of hydrogen and obtaining a stream of a product having high concentration of xylene, in which the catalyst contains a mordenite component; an acid molecular sieve component MFI, having molar ratio Si/Al₂ less than 40, a rhenium component in the range of 0.05 to 5% of the weight of the catalyst; and a dispersing binding agent which is an inorganic oxide.

EFFECT: possibility of obtaining a transalkylation product with low content of components which boil together with benzene.

17 cl, 2 ex, 2 tbl