Treatment method for improving selectivity of catalytic cracking catalyst

Abstract

The invention discloses a treatment method for improving the selectivity of a catalytic cracking catalyst, which comprises the following steps: filling a fresh catalyst into a phase fluidized bed, contacting the fresh catalyst with aging medium containing water vapor, aging under a certain hydrothermal condition to obtain an aged catalyst; and adding the aged catalyst into an industrial catalytic cracking device. In the method, the activity and selective distribution of the catalyst in the catalytic cracking device are more uniform to obviously improve the selectivity of the catalytic cracking catalyst, thereby obviously reducing dry gas productivity and coke productivity.

Description

technical field [0001] The invention relates to a catalyst treatment method in the field of catalytic cracking, more specifically, a catalyst aging method used in industrial catalytic cracking units. Background technique [0002] The catalyst in the industrial catalytic cracking unit is constantly worn and lost during operation. In addition, in order to maintain the equilibrium catalyst activity required by the reaction, part of the equilibrium catalyst is often unloaded, and at the same time it is forced to replenish fresh catalyst, so there is a fresh Catalyst is the reasonable rate of replacement of the system's equilibrium catalyst inventory. Therefore, the balance catalyst is the joint result of the continuous addition of fresh catalyst and the continuous loss of system balance catalyst (including artificial unloading). The hydrothermal deactivation of the catalyst is a slow process with an average lifespan of 30-100 days. During the deactivation process, the activity ...

AI Technical Summary

Problems solved by technology

This method is only suitable for processing hydrogenation catalysts, not suitable for processing catalytic cracking catalysts

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