Catalytic cracking gasoline pre-hydrogenation sulfuration type catalyst as well as preparation method and application thereof

By using alumina-acid molecular sieve composite support and water-soluble organic polymer coating technology, combined with the complexing agent in the co-impregnation liquid, a catalyst with high active site density was formed, which solved the problems of uneven distribution of active components and complex carrier preparation in the catalytic cracking gasoline hydrodesulfurization process in the prior art, and achieved efficient thiol removal, double bond isomerization and octane increase.

CN119972158AActive Publication Date: 2025-05-13PETROCHINA CO LTD
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Patent Information

Application Number
CN202311502364.5
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

During the catalytic cracking gasoline hydrodesulfurization process, it is difficult for existing catalysts to achieve efficient thiol removal, double bond isomerization and octane increase at the same time, and the carrier preparation process is complicated and the active components are unevenly distributed.

Method used

Alumina-acid molecular sieve composite support is used, and the acid molecular sieve powder is coated with water-soluble organic polymers, and combined with the complexing agent in the co-impregnation liquid to form a catalyst with high active site density.

Benefits of technology

During the hydrodesulfurization process of catalytic cracking gasoline, the high thiol removal rate, double bond isomer activity and octane number are increased, the carrier preparation process is relatively simplified, and the active components are distributed evenly.

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Abstract

The invention provides a catalytic cracking gasoline pre-hydrogenation sulfuration type catalyst as well as a preparation method and application thereof. The catalyst comprises an aluminum oxide-acidic molecular sieve composite carrier as well as a main active metal sulfide and an auxiliary active metal sulfide which are loaded on the composite carrier, in the composite carrier, the acidic molecular sieve is loaded in an accumulation pore channel of aluminum oxide, the dry basis mass ratio of the acidic molecular sieve to the aluminum oxide is (1.0-5.0): 1, and the total acid content of the composite carrier is 1.0-2.0 mmol / g; based on the total weight of the catalyst, the contents of the main active metal and the auxiliary active metal are 1.0-17.0 wt% and 2.0-20.0 wt% respectively based on respective oxides of the main active metal and the auxiliary active metal; the concentration of the main active metal-auxiliary active metal-sulfur active sites in the catalyst is 0.20-0.40 mmol / g, and the total acid content is 1.30-1.80 mmol / g. The catalyst disclosed by the invention has high mercaptan removal activity, high alkadiene removal activity and high double-bond isomerization activity.
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Citation Information

Patent Citations

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  • Catalytic cracking gasoline pre-hydrogenation catalyst and preparation method thereof

    CN109201072A

  • Vulcanization type hydrogenation catalyst and preparation method thereof, and gasoline hydrodesulfurization method

    CN107999092A

  • Vulcanization type hydrogenation catalyst and preparation method and application thereof

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  • Hydrogenation desulfurized catalyst containing molecular screen

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