Heavy metal trapping auxiliary agent for catalytic cracking as well as preparation method and application of heavy metal trapping auxiliary agent

By developing heavy metal capture additives in catalytic cracking catalysts, the problem of heavy metal destruction catalysts is solved by combining vanadium trapping and blunt nickel components, and the effect of reducing coke and dry gas yields and improving economic benefits is achieved.

CN119972196AActive Publication Date: 2025-05-13PETROCHINA CO LTD
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Patent Information

Application Number
CN202311502255.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-11-10
Publication Date
2025-05-13
Estimated Expiration
2043-11-10

AI Technical Summary

Technical Problem

When faced with raw oil with high content of vanadium and nickel, existing catalytic cracking catalysts are susceptible to heavy metal damage, resulting in an increase in coke and dry gas yields, affecting economic benefits.

Method used

A heavy metal trapping additive for catalytic cracking is developed, which improves the utilization rate and dispersion uniformity of the blunt nickel component by adding vanadium trapping components inside the structure and adding blunt nickel component to the surface.

Benefits of technology

Effectively capture and passivate heavy metals vanadium and nickel, reduce coke and dry gas yields, improve the economic benefits of catalytic cracking devices, and protect the main catalyst from vanadium damage.

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Abstract

The invention provides a heavy metal trapping auxiliary agent for catalytic cracking and a preparation method and application thereof, the preparation method comprises the following steps: uniformly mixing pseudo-boehmite, a binder, clay, acid and water, adding a vanadium trapping component, and mixing to obtain vanadium trapping slurry; the vanadium capturing slurry is subjected to spray drying forming and then roasted, and solid microspheres are obtained; uniformly mixing the solid microspheres and melamine in an organic solvent and water, adding a nickel-dull component, and mixing to obtain heavy metal trapping slurry; and filtering, drying and roasting the heavy metal trapping slurry to obtain the heavy metal trapping additive for catalytic cracking. The heavy metal trapping agent provided by the invention can realize efficient vanadium trapping and nickel passivation in the catalytic cracking process, effectively alleviates the damage of heavy metals to the catalyst and the influence on the product yield, improves the conversion rate and the total liquid yield, and reduces the coke and dry gas yield.
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Citation Information

Patent Citations

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    CN104226234A

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