METHOD AND SYSTEM FOR REFORMING NAPHTHA Russian patent published in 2022 - IPC C10G35/04 C10G59/02 C10G59/06 

FIELD: petroleum industry.

SUBSTANCE: invention relates to a method for reforming naphtha, including: introduction of a stream of hydrocarbon raw materials into a first reactor operating under conditions of adiabatic reforming of naphtha, wherein the first reactor comprises a first naphtha reforming catalyst, and wherein the stream of hydrocarbon raw materials comprises convertible hydrocarbon; conversion, in the first reactor, of at least part of the converted hydrocarbon in the stream of hydrocarbon raw materials into aromatic hydrocarbon resulting in the output stream of the first reactor; passage of the output stream of the first reactor from the first reactor to the second reactor operating under conditions of isothermal reforming of naphtha, wherein said second reactor comprises multiple tubes located inside the reactor furnace; and a second naphtha reforming catalyst, wherein the particles of the second naphtha reforming catalyst are located in the multiple tubes; wherein at least one tube from the multiple tubes comprises multiple catalytic zones, and wherein the first naphtha reforming catalyst and the second naphtha reforming catalyst are the same or different; heating of the output stream of the first reactor; conversion, in the second reactor, of at least an additional part of the converted hydrocarbon in the output stream of the first reactor into an additional amount of aromatic hydrocarbon resulting in the output stream of the second reactor; and extraction of the output stream of the second reactor from the second reactor. The invention also relates to two variants of the reactor system.

EFFECT: use of the present invention provides a possibility of increasing the degree of conversion and selectivity, while simultaneously maintaining lower temperatures of the walls of the reactor tubes and a lower total pressure drop.

30 cl, 9 dwg, 1 tbl, 1 ex