ALKYLATION AND CATALYST REGENERATIVE PROCESS

摘要

A process for the regeneration of a deactivated zeolite beta catalyst such as rare earth promoted zeolite beta catalyst deactivated in the course of an aromatic alkylation reaction (4). A zeolite beta conversion catalyst deactivated with the deposition of coke is heated to a temperature in excess of 300°C in an oxygen-free environment (38). An oxidative regeneration gas is supplied to the catalyst bed with oxidation of a portion of a relatively porous coke component to produce an exotherm moving through the catalyst bed (4). At least one of the temperature and oxygen content of the gas is progressively increased to oxidize a porous component of the coke. Regeneration gas is supplied having at least one of an increased oxygen content or increased temperature to oxidize a less porous refractory component of the coke. The regeneration process (38 and 38a) is completed by passing an inert gas through the catalyst bed (4) at a reduced temperature.