Proceso de craqueo catalítico fluido para la maximización de olefinas ligeras en operaciones de baja severidad

• Main Authors: Lau, Lam Yiu, Bastiani, Raquel, Baptista, Claudia Maria de Lacerda Alvarenga
• Format: Patent
• Language: Spanish
• Published: 24.09.2018
• 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

Proceso de craqueo catalítico fluido (FCC), que utiliza condiciones de operación de baja severidad en unidades de FCC para maximizar la cantidad y la calidad de los destilados medios y aumentar los rendimientos de GLP y olefinas ligeras; en el que dichas condiciones de operación de baja severidad comprenden una temperatura inferior a 510 ºC, caracterizado por que utiliza un sistema catalítico que comprende dos zeolitas, en el que al menos una de dichas zeolitas tiene un tamaño de poro equivalente al tamaño de los poros de las zeolitas del tipo ferrierita, en el que al menos una de dichas zeolitas comprende una zeolita del tipo ZSM-5, en el que dicho sistema catalítico contiene un porcentaje en peso de zeolita del tipo ferrierita de un 1 % a un 5 %, basado en el peso total del catalizador, y un porcentaje en peso de zeolita del tipo ZSM-5 de menos de un 2 %, basado en el peso total del catalizador. The present invention concerns the field of fluid catalytic cracking (FCC) processes. The invention provides a process increasing production of LPG and propene in FCC units operating under conditions of maximisation of middle distillates of low aromaticity, such that they may be incorporated into the diesel oil pool. The invention also relates to the preparation and employment of additives based on zeolites having small pores, such as ferrierite (FER), in catalytic systems for FCC units, wherein conditions of low severity are adopted with a view to increasing yields of LPG and light olefins whilst improving stability of petrol. The invention also provides an original catalytic system, being more efficient than catalytic systems known in the state of the art, to increase the yield of LPG and propene without prejudicing the yield and quality of LCO. Furthermore it provides a method of preparation of an additive for said process employing the zeolite ferrierite.