Method for producing xylene

• Main Authors: OHSHIO, NOBUYASU, KAWADA, YUSUKE
• Format: Patent
• Language: Chinese; English
• Published: 16.11.2015
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; CRACKING HYDROCARBON OILS; FUELS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; LUBRICANTS; METALLURGY; MINERAL WAXES; ORGANIC CHEMISTRY; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; TECHNICAL GASES CONTAINING CARBON MONOXIDE; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

A method for producing xylene easily produces xylene in high yield using catalytic cracking gasoline that has a low aromatic hydrocarbon content, and includes an unsaturated hydrocarbon, sulfur, nitrogen, and the like, as a raw material for a conversion reactions such as a disproportionation reaction or a transalkylation reaction. The method for producing xylene includes (a) a fractional distillation step that subjects fluid catalytic cracking gasoline to fractional distillation to obtain a fraction having a boiling point of 145 to 205 DEG C, (b) a hydrotreating step that subjects the fraction having a boiling point of 145 to 205 DEG C obtained by the fractional distillation step (a) to hydrodesulfurization/denitrification to adjust the sulfur content and the nitrogen content to 0 to 6 mass ppm and 0 to 6 mass ppm, respectively, and (c) a disproportionation/transalkylation step that subjects the product oil including an aromatic hydrocarbon obtained by the hydrotreating step (b) to a disproportionation reacti