METHOD AND SYSTEM FOR TREATMENT OF CATALYTIC CRACKING REACTION PRODUCT AND THEIR APPLICATION Russian patent published in 2023 - IPC C10G63/08 C10G7/00 

FIELD: catalytic cracking.

SUBSTANCE: invention relates to a process for treating a catalytically cracked product, comprising first fractionating catalytically cracked gas oil or catalytically cracked gasoline from a catalytically cracked reactor to produce heavy gasoline and optionally light gasoline, wherein the light gasoline has an initial boiling point of 20-40°C, and a final boiling point of 80-100°C, and heavy gasoline has an initial boiling point of 80-100°C, and a final boiling point of 200-250°C. Carrying out the second fractionation of heavy gasoline to obtain a heavy gasoline fraction and optionally a medium density gasoline fraction, whereas the medium density gasoline fraction comprises light C6-C8 aromatics, has an initial boiling point of 80-100°C, and a final boiling point of 120-150°C, and the fraction of heavy gasoline comprises C9+ aromatic compounds, has an initial boiling point of 120-150°C, and a final boiling point of 200-250°C. Optional implementation of the extraction of aromatic compounds from the fraction of medium density gasoline to obtain aromatic compounds BTX (benzene, toluene, xylene) and aromatic refined oil; directing the heavy gasoline fraction to a fluidized bed reactor and contacting a dealkylation catalyst for dealkylation in the presence of hydrogen to obtain a dealkylated liquid product and a spent dealkylation catalyst; and returning said dealkylated liquid product to step (ii) to carry out a second fractionation of said heavy gasoline. The invention also relates to a catalytic cracking product treatment system, a catalytic cracking system and a catalytic cracking process.

EFFECT: effective conversion of C9+ aromatic compounds comprised in catalytic cracking gas oil and catalytically cracked gasoline into light C6-C8 aromatic compounds, obtaining light olefins with a higher yield, while ensuring long-term stable operation.

18 cl, 14 ex, 5 tbl, 3 dwg