Liquefied gas hydrogenation catalyst, its preparation method and application

The liquefied gas hydrogenation catalyst prepared by modifying the γ-alumina support and undergoing specific calcination treatment solved the problem of metal sulfide migration and aggregation at high temperatures, improved the catalyst's stability and lifespan, and ensured the removal of organic sulfur and olefin saturation in liquefied gas.

CN120644217BActive Publication Date: 2026-05-05CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Application Number
CN202410285203.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-03-13
Publication Date
2026-05-05
Estimated Expiration
2044-03-13

AI Technical Summary

Technical Problem

Existing LPG hydrogenation catalysts are prone to migration and aggregation of the metal sulfide active phase under high temperature conditions, which affects the catalyst stability. Furthermore, olefin polymerization forms carbon deposit precursors, resulting in insufficient catalyst stability and lifespan.

Method used

A liquefied gas hydrogenation catalyst with low average number of lamellar layers and high monolayer ratio of active metal components was prepared by using modified γ-alumina as a support. Through treatment with modified additives and high-temperature calcination, combined with impregnation of quaternary ammonium salt compounds and active components and H2S+H2 calcination, a catalyst with good stability was prepared.

Benefits of technology

Maintaining good organic sulfur removal and olefin saturation performance under high temperature conditions improves catalyst stability and service life, and reduces the risk of carbon deposit formation.

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Abstract

This invention proposes a liquefied petroleum gas (LPG) hydrogenation catalyst, its preparation method, and its application. The catalyst contains a support and an active metal component; the support is modified γ-alumina, and the modifying agent used in the modified γ-alumina is one or more of Si, Ti, Zr, P, and B; the active metal component is a Group VIB metal sulfide and / or a Group VIII metal sulfide, wherein the average number of lamellar layers of the Group VIB metal sulfide and / or the Group VIII metal sulfide is <1.5 layers, and the proportion of single layers is 70%–90%. The LPG hydrogenation catalyst uses modified γ-alumina as a support, has a low average number of lamellar layers of the active metal component, and a high proportion of single layers; the catalyst still exhibits good organic sulfur removal and olefin saturation performance after long-term operation under high-temperature conditions, demonstrating good stability.
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