FCC equilibrium catalyst reactivation and modification method

Abstract

The invention discloses an FCC equilibrium catalyst reactivation and modification method. The method comprises following steps: (1) ammonium ion exchange: mixing an FCC equilibrium catalyst with water, carrying out pulping to prepare FCC equilibrium catalyst slurry, heating the slurry to a temperature of 50 to 95 DEG C, mixing the slurry with ammonium salts, carrying out ammonium ion exchange for1 to 3 hours under stirring, and performing filtering, washing, and drying, wherein after ammonium ion exchange, the Na2O content of the FCC equilibrium catalyst is reduced to 0.2 wt% or less; and (2)mixing the FCC equilibrium catalyst, which has a Na2O content of 0.2 wt% or less and is obtained in the step (1), with water, carrying out pulping, mixing obtained slurry with magnesium salts and phosphor containing compounds, stirring, carrying out co-precipitation for 10 to 60 minutes, and finally performing filtering, drying, and burning to obtain reactivated FCC equilibrium catalyst. The provided method can recover the catalytic cracking activity of an FCC equilibrium catalyst and improves the selectivity of cracking products. The method is simple, is easy to perform and is environmentally friendly at the same time.

Description

technical field [0001] The invention relates to a modification method of an FCC balancer, in particular to a chemical modification revival modification method which can significantly improve the catalytic cracking performance of the FCC balancer. Background technique [0002] Catalytic cracking (FCC) is an important secondary processing technology in the oil refining industry, and plays a pivotal role in the oil refining industry. With the increasing quality and inferiority of crude oil in the world, heavy oil FCC has developed rapidly and has accounted for 25% of the total crude oil processing capacity in the world. However, in addition to a large amount of colloid and asphaltene, heavy oil also contains a lot of heavy metal components. Therefore, in the heavy oil FCC reaction process, with the continuous destruction of the structure of the FCC catalyst and the continuous deposition of heavy metal components, the catalytic cracking performance of the catalyst gradually det...

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Problems solved by technology

[0004] However, most of the above-mentioned chemical treatment methods are complex and cumbersome, the reaction conditions are harsh, and the treatment process will also produce a large amount of harmful waste, causing great environmental pollution.

In addition, the revitalization methods of the balancer reported so far are often only aimed at how to improve the catalytic cracking activity of the balancer, and there is no significant improvement in the selectivity of the catalytic cracking products of the balancer, and the deterioration of product selectivity is the most important reason for the unusability of the balancer. key reason

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