PREPARATION OF CRACKING CATALYSTS, AND CRACKING PROCESS USING THEM

• Main Authors: KOWALSKI, JOCELYN A, ABSIL, ROBERT P. L, HERBST, JOSEPH A, CHITNIS, GIRISH K
• Format: Patent
• Language: English; French
• Published: 13.09.1992
• Edition: 5
• 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

Catalysts for use in cracking, comprising a zeolite and a matrix, are prepared by a procedure which includes phosphate treatment of the zeolite, optionally of matrix constituents also. The zeolite may be of large, intermediate or small pore size. The preferred procedure involves mixing the zeolite with aqueous phosphate solution, combining this mixture with matrix precursor to form a slurry, and spray-drying the slurry. Catalysts so prepared are of enhanced attrition resistance, and in certain embodiments also provide improved selectivity and/or product quality in use. They are well suited for cracking heavy feeds such as resid. F-5793(6123) PREPARATION OF CRACKING CATALYSTS, AND CRACKING PROCESS USING THEM Catalysts for use in cracking, comprising a zeolite and a matrix, are prepared by a procedure which includes phosphate treatment of the zeolite, optionally of matrix constituents also. The zeolite may be of large, intermediate or small pore size. The preferred procedure involves mixing the zeolite with aqueous phosphate solution, combining this mixture with matrix precursor to form a slurry, and spray-drying the slurry. Catalysts so prepared are of enhanced attrition resistance, and in certain embodiments also provide improved selectivity and/or product quality in use. They are well suited for cracking heavy feeds such as resid.