Preparation method of catalytic cracking catalyst with low coke yield and high BTX yield

• Main Authors: ZHOU LINGPING, YUAN SHUAI, ZHANG WEILIN, ZHANG JIEXIAO, SHA HAO, SONG HAITAO, YAN JIASONG, XU MINGDE
• Format: Patent
• Language: Chinese; English
• Published: 07.04.2023
• 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 preparation method of a low-green-coke catalytic cracking catalyst without ammonia nitrogen pollution. The method comprises the following steps: mixing an unmodified NaY molecular sieve with an aluminum oxide binder, a silicon oxide binder, clay and water, pulping, performing spray drying, and roasting to obtain catalyst microspheres; and then, carrying out ion exchange modification, mild hydrothermal ultra-stable modification, SiCl4 gas phase ultra-stable modification, pore channel cleaning modification and gallium and/or boron active element modification treatment. The preparation method is a preparation method of the ammonia-nitrogen-pollution-free high-yield BTX catalytic cracking catalyst, the catalytic cracking catalyst which is larger in pore volume and specific surface area and better in strength can be prepared through the method, ammonia-nitrogen pollution does not exist in the whole preparation process of the catalyst, and the catalyst is environmentally friendly. And the