Hydrogen reactivation of zeolite cracking and conversion catalysts.

摘要

This invention describes a process for the reactivation of zeolite type FCC and olefins or oxygenates conversion catalysts comprising: contacting under heat transfer and reducing conditions a hydrogen feed stream at low temperature and a fluidized catalyst stream comprising FCC zeolite type catalyst particles at elevated temperature from an FCC process unit; separating the combined hydrogen and FCC catalyst stream into a first portion stream comprising partially reduced FCC catalyst and a second portion stream comprising substantially hydrogen at elevated temperature; mixing under aromatizing conditions the first portion stream and the catalyst fluidizing lift stream comprising light hydrocarbon feed gas and feeding to a gas oil FCC reactor; contacting under reactivating conditions in a reactivating zone the second portion stream at elevated temperature and substantially coked and carbonaceous zeolite type oxygenates or olefins conversion catalyst from a conversion reactor; withdrawing reactivating conversion catalyst from the reactivating zone and returning the reactivating catalyst to the conversion reactor under conversion conditions.