Catalytic cracking cocatalyst with high thermal wear resistance and preparation method thereof

By using high shear emulsifier to mix acid in the catalytic cracking cocatalyst, a low-collective γ-alumina precursor and clay, combined with a modifier of multi-grass chelating ligand and coordination metal, the problem of poor thermal wear resistance of existing cocatalysts is solved, and efficient catalytic cracking reaction and stable operation of long-term equipment is achieved.

CN119657211AActive Publication Date: 2025-03-21PETROCHINA CO LTD
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Patent Information

Application Number
CN202311224772.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-09-21
Publication Date
2025-03-21
Estimated Expiration
2043-09-21

AI Technical Summary

Technical Problem

The existing catalytic cracking propylene and octane cocatalysts have poor thermal wear resistance due to low molecular sieve content, small pore volume and low specific surface area, which affects the smooth operation of the long-term cycle of the catalytic cracking device.

Method used

The MFI structural molecular sieve, low-collective index γ-alumina precursor and clay were used as substrates to combine multi-message ligands and coordination metal modifiers to form a catalytic cracking cocatalyst with high thermal wear resistance.

Benefits of technology

The thermal wear resistance, large pore capacity and polymer sieve content of the catalytic cracking cocatalyst are significantly improved, the stability and yield of the catalytic cracking reaction are enhanced, and the long-term stable running time of the device is extended.

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Abstract

The invention discloses a catalytic cracking cocatalyst with high thermal wear resistance. The catalytic cracking cocatalyst comprises a molecular sieve, a matrix, a binder and a binder modifier, the molecular sieve has an MFI structure, and the molecular sieve with the pore diameter of less than 0.7 nm accounts for 50-100 wt% of the total amount of the molecular sieve; the matrix is composed of a gamma-alumina precursor with a peptizing index less than or equal to 50% and clay; the binder is prepared from a phosphorus-containing compound and an aluminum-containing compound; the binder modifier is prepared from the following raw materials: a polymeshed chelating ligand, precursors of at least two coordination metals, alcohol and organic acid; the binder is mixed with the binder modifier and the matrix in a high shear emulsifier. Compared with the existing catalytic cracking propylene and octane number promoter, the catalytic cracking promoter provided by the invention has higher thermal wear resistance, large pore volume and high molecular sieve content.
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