Process for the selective hydrogenation of pyrolysis gasoline

By using a TiO2-Al2O3 composite oxide catalyst, the problems of insufficient stability and activity of existing cracked gasoline hydrogenation catalysts were solved, achieving efficient removal of unsaturated hydrocarbons and impurities at low temperatures and improving the hydrogenation effect of cracked gasoline.

CN116836724BActive Publication Date: 2026-02-27CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Application Number
CN202210303069.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-03-24
Publication Date
2026-02-27
Estimated Expiration
2042-03-24

AI Technical Summary

Technical Problem

Existing cracked gasoline hydrogenation catalysts have shortcomings in terms of stability and activity, especially under high space velocity conditions, they are difficult to effectively remove unsaturated hydrocarbons and impurities, resulting in unstable oil properties and affecting their further utilization.

Method used

A hydrogenation refining catalyst using TiO2-Al2O3 composite oxide as a support was prepared by controlling its specific surface area and pore size ratio to ensure that titanium dioxide in the anatase crystal phase is dominant, thereby improving the active sites and electron capture ability.

Benefits of technology

The catalyst significantly improved the hydrogenation activity, selectivity, and stability of cracked gasoline under low-temperature conditions, making it suitable for different fractions of cracked gasoline and enhancing the overall performance of the catalyst.

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Abstract

A method for selective hydrogenation of pyrolysis gasoline, comprising contacting pyrolysis gasoline with a hydrogenation catalyst in the presence of hydrogen, the hydrogenation catalyst comprising a composite oxide, the composite oxide comprising alumina and titania, the specific surface area of the composite oxide being represented by X m 2 / g, the average pore diameter of the composite oxide being represented by Y nm, wherein the ratio of X to Y is 5 to 30; in the composite oxide, the titania in an anatase crystal phase accounts for 95wt% to 100wt% of the total titania. The method can selectively hydrogenate dienes in the C6-C8 fraction and the C9-C10 fraction of pyrolysis gasoline, and has the advantages of good low-temperature activity, good adaptability to raw materials, and high stability.
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