CATALYTIC CRACKING CATALYST COMPRISING LARGE-PARTICLE-SIZE SOL AND APPLICATION THEREOF

• Main Authors: YUAN, Shuai, YAN, Jiasong, LI, Jiaxing, YU, Shanqing, ZHANG, Jiexiao
• Format: Patent
• Language: English; French; German
• Published: 28.08.2024
• 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

A catalytic cracking catalyst comprising a large-particle-size sol and a method for preparing the same. The catalytic cracking catalyst comprises, based on its total weight, 15-50 wt.% of beta zeolite, 10-75 wt.% of clay, and 10-50 wt.% of large-particle-size sol; the pore distribution is determined by a low-temperature nitrogen adsorption method, and the total pore volume is not less than 0.200 mL/g, wherein the pore volume of 4-50 nm mesopores accounts for more than 60% of the total pore volume; the large-particle-size sol comprises 10-40 wt.% of Al2O3, 50-85 wt.% of P2O5, and 0.2-10 wt.% of SiO2, wherein the P2O5:Al2O3 mass ratio is (1.5-5.0): 1, and the SiO2:Al2O3 mass ratio is (0.01-0.3): 1, and the average particle size of the sol is concentrated in the range of 20 to 50nm. The preparation method comprises: an aluminum source and deionized water are mixed to obtain a first slurry, the first slurry and a phosphorus source are mixed to obtain a second slurry, a silica sol is added into the second slurry to obtain a third slurry, the third slurry is subjected to aging treatment to obtain a large-particle-size sol. The large-particle-size sol is mixed uniformly with clay and beta zeolite to obtain a fourth slurry, which is spray dried and calcined. The catalyst is applied in the catalytic cracking process, and can significantly increase the yield and selectivity of C4 olefins.