Demetallization recovery method of spent catalytic cracking catalyst

Abstract

The invention relates to the field of waste catalyst treatment, and discloses a method for demetallization and resurrection of waste catalytic cracking catalyst. The method comprises: contacting the spent catalytic cracking catalyst with an aqueous solution containing an organic phosphonic acid compound, and then performing solid-liquid separation, and washing and drying the solid phase obtained by the solid-liquid separation to obtain a revived catalytic cracking catalyst. The method of the invention has high metal removal rate, high micro-reactivity of the revived catalyst obtained, and simple and convenient operation.

Description

technical field

[0001] The invention relates to the field of waste catalyst treatment, in particular to a method for demetallization and resurrection of waste catalytic cracking catalysts. Background technique

[0002] In recent years, the general heavier and inferior quality of crude oil has made residual oil catalytic cracking play an increasingly important role in the refining industry. The residual oil contains high levels of heavy metals such as Fe, Ni and V and other harmful substances. In order to maintain the high conversion rate and selectivity of the heavy oil catalytic cracking unit, the refinery generally adopts the method of unloading the spent catalytic cracking catalyst and replenishing the fresh agent. way. At present, spent catalytic cracking catalysts (FCC catalysts) have been defined as hazardous wastes by the newly promulgated "National Hazardous Waste List", and the supervision of their recycling and disposal is more stringent. If the spent catalytic c...

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