INITIAL HYDROTREATMENT OF NAPHTHENES WITH SUBSEQUENT HIGH-TEMPERATURE REFORMING Russian patent published in 2016 - IPC C10G35/02 C10G59/02 C10G63/02 C07C15/02 C07C4/04 

FIELD: chemistry.

SUBSTANCE: method includes: feeding hydrocarbon material containing naphtha and a hydrogen-containing recycle gas obtained from an aromatic compound separating apparatus into a first reactor to obtain a first output stream with low content of naphthenes, wherein the first reactor is a dehydrogenation reactor or a reforming reactor operating at a low temperature; feeding the first output stream into a separator to produce a stream of light hydrocarbons containing C7 or lighter hydrocarbons and a stream of heavy hydrocarbons containing C8 or heavier hydrocarbons; feeding the stream of heavy hydrocarbons into a second reactor system to obtain a second output stream with high content of aromatic compounds; feeding the second output stream and the stream of light hydrocarbons into a third reactor system to obtain a third output stream containing aromatic compounds; and feeding the third output stream into a reforming product separating column to obtain an overhead product containing C7 or lighter aromatic compounds and hydrocarbons, and bottom product containing C8 or heavier aromatic compounds and hydrocarbons. The second reactor system is the first reforming reactor system operating at a second set of reaction conditions, and the third reactor system is the second reforming reactor system operating at a third set of reaction conditions, wherein the second set of reaction conditions includes temperature in the range of 540-580°C and pressure lower than 580 kPa, and pressure in the second set of conditions is lower than pressure in the third set of conditions.

EFFECT: use of the present invention reduces power consumption.

9 cl, 4 dwg, 5 tbl, 2 ex