Catalytic cracking catalyst and preparation method thereof

• Main Authors: GUO CHENGYU, GUO GUANGJUAN, LI ZHAOFEI, ZHANG ZHAOQIAN
• Format: Patent
• Language: Chinese; English
• Published: 21.10.2022
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; CRACKING HYDROCARBON OILS; FUELS; LUBRICANTS; METALLURGY; MINERAL WAXES; 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 present invention relates to a catalytic cracking catalyst and a preparation method thereof, the catalyst comprises a carrier or a matrix and a modified Y molecular sieve, and the modified Y molecular sieve is prepared by the following method: S1, uniformly mixing an REY molecular sieve and an AlCl3 solid in a dry atmosphere; s2, introducing air into the REY molecular sieve and AlCl3 solid mixture, reacting at 50-350 DEG C for 0.5-12 hours, and purging with nitrogen for 1-5 hours after the reaction is completed; and S3, washing and drying to obtain the modified Y molecular sieve. The REY molecular sieve after rare earth exchange is treated by a novel gas phase dealumination method, and the prepared modified Y type molecular sieve product not only contains rare earth elements, but also has more developed mesoporous channels compared with silicon tetrachloride gas phase dealumination and silicon supplementation, and is more suitable for being used as an active component in a catalyst for treating heavy and