Method for producing triene, BTX and dimethylnaphthalene by using double fluidized bed reactor

• Main Authors: GONG JIANHONG, LIU WENMING, BAI FENGYU, GENG SULONG, TANG JINLIAN
• Format: Patent
• Language: Chinese; English
• Published: 03.02.2023
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; CRACKING HYDROCARBON OILS; FUELS; LUBRICANTS; METALLURGY; MINERAL WAXES; ORGANIC CHEMISTRY; PEAT; PERFORMING OPERATIONS; PETROLEUM, GAS OR COKE INDUSTRIES; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; 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; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention relates to a method for producing triene, BTX and dimethylnaphthalene, which comprises the following steps: S1, cracking light hydrocarbon oil in a rapid fluidized bed reactor to obtain first reaction oil gas and a first spent catalyst; s2, the catalytic cracking light cycle oil and a methylating agent are introduced into a turbulent fluidized bed reactor for a methylation reaction, and second reaction oil gas and a second spent catalyst are obtained; s3, separating the first reaction oil-gas product and the second reaction oil-gas product to obtain low-carbon olefin, light aromatic oil and heavy aromatic oil; carrying out desulfurization and denitrification on the light aromatic hydrocarbon oil, and then carrying out aromatic hydrocarbon extraction to obtain BTX monocyclic aromatic hydrocarbon; carrying out desulfurization and denitrification on the heavy aromatic hydrocarbon oil, and then carrying out aromatic hydrocarbon separation to obtain dimethylnaphthalene; s4, introducing the second spe