CATALIZADOR DE CRAQUEO, SU PREPARACION Y EMPLEO

• Main Authors: HERBST, JOSEPH ANTHONY, BUNDENS, ROBERT GLENN
• Format: Patent
• Language: Spanish
• Published: 16.03.1992
• 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

NUEVAS COMPOSICIONES CATALIZADORAS DE ESTABILIDAD HIDROTERMICA SUPERIOR, QUE DAN LUGAR A PRODUCCIONES INCREMENTEDAS DE GASOLINA MAS DESTILADOS, SELECTIVIDAD MEJORADA FRENTE AL COQUE Y PRODUCCION REDUCIDA DE GAS C4 QUE ESTAN BASADAS EN UN ARMAZON DE ZEOLITAS FANJASITICAS DESALUMINADAS QUE TIENEN UNA PROPORCION MOLAR DE SILICE A ALUMINA EN EL ARMAZON DE APROXIMADAMENTE 5 A 100. EN UNA REIVINDICACION PREFERIDA UN "ULTRAESTABLE Y" AGLOMERADO CON UNA MATRIZ SE SOMETE A UN TRATAMIENTO CON UNA FUENTE DE COMPUESTOS DE ALUMINIO Y TIERRAS RARAS, SEGUIDO DE UN TRATAMIENTO HIDROTERMICO PARA MEJORAR LA ESTABILIDAD HIDROTERMICA Y LA SELECTIVIDAD DEL CATALIZADOR PARA EL CRAQUEO CATALITICO. ESTO SE PONE DE MANIFIESTO EN PRODUCCIONES MAS ALTAS DE GASOLINA Y DESTILADOS Y PRODUCCION MAS BAJA DE COQUE Y GAS PARA UN USO MAS BAJO DE CATALIZADOR POR BARRIL DE CRUDO, EN RELACION CON LOS CATALIZADORES DE CRAQUEO COMERCIALES GENERALMENTE UTILIZADOS. New catalyst compositions of superior hydrothermal stability, which evidence increased gasoline plus distillate yields, improved coke selectivity and reduced C4- Gas yields, are based on framework dealuminated faujasitic zeolites having a framework silica to alumina molar ratio of from about 5 to l00. In a preferred embodiment, an "ultrastable Y" composited with a matrix is subjected to a treatment with a source of aluminum and rare earth compounds followed by hydrothermal treatments to improve the hydrothermal stability and selectivity of the catalyst for catalytic cracking. This is evidenced by higher gasoline plus distillate yields and lower coke and gas production at lower catalyst usage per barrel of feed relative to commercial cracking catalysts currently being used.