PROCESS FOR PRODUCTION OF HIGH OCTANE GASOLINE FROM CATALYTIC CRACKING UNIT

摘要

PROCESS FOR PRODUCTION OF HIGH OCTANE GASOLINE FROM CATALYTIC CRACKING UNIT This invention provides an improvement in the operation of an FCCU such a to maintain the octane rating of the gasoline fraction from the cracker at a high level over repeated cycles of cracking charge and regeneration by using fresh zeolitic catalyst particles having an alkali metal oxide less than about 1.5% (based on the zeolite content) and controlling the amount of alkali metal oxide that comes into contact with catalyst inventory throughout cracking, stripping and regeneration so as to maintain alkali metal oxide content of equilibrium catalyst below 2.0%, based on the weight of zeolite in the fresh zeolitic catalyst.