NAPHTHA REFORMING METHOD Russian patent published in 2022 - IPC C10G59/02 B01J8/06 

FIELD: chemical or physical processes.

SUBSTANCE: invention relates to a method of reforming naphtha, comprising introducing a stream of hydrocarbon feedstock into a first reactor operating under conditions of adiabatic reforming of naphtha, wherein the operating temperature in the first reactor does not exceed 1,000 °F (538 °C), wherein said first reactor comprises a first naphtha reforming catalyst, and wherein the hydrocarbon feed stream contains a convertible hydrocarbon. Then conversion in the first reactor of at least part of the converted hydrocarbon in the hydrocarbon feed stream into an aromatic hydrocarbon to obtain an output stream of the first reactor. Passing the first reactor effluent from the first reactor to a second reactor operating under conditions of isothermal reforming of naphtha, wherein the operating temperature in the second reactor does not exceed 1,000 °F (538 °C), wherein said second reactor comprises a plurality of tubes with a second naphtha reforming catalyst arranged therein, wherein the plurality of tubes is located inside the reactor furnace, wherein the plurality of tubes includes from 250 tubes to 5,000 tubes. First reactor effluent heating inside reactor furnace, and wherein the first naphtha reforming catalyst and the second naphtha reforming catalyst are the same or different; converting, in the second reactor, at least an additional portion of the converted hydrocarbon in the output stream of the first reactor into an additional amount of aromatic hydrocarbon to obtain an output stream of the second reactor. Removing the second reactor effluent from the second reactor, wherein the amount of the first naphtha reforming catalyst in the first reactor is less than the amount of the second naphtha reforming catalyst in the second reactor. Invention also relates to a naphtha reforming reactor system and another naphtha reforming method.

EFFECT: technical result is high selectivity and degree of conversion of naphtha reforming with simultaneous provision of lower rates of catalyst deactivation.

46 cl, 1 ex, 1 tbl, 14 dwg