Carrier complex, method for preparing and using same, and catalyst, method for preparing and using same, and method for dehydrogenating lower alkane

By preparing a composite support of Al and Group IVB metal elements with a particle size distribution of 3-35 micrometers, the problem of low selectivity of existing catalysts was solved, and a highly selective and stable propane dehydrogenation to propylene effect was achieved, simplifying the preparation process.

CN119972049BActive Publication Date: 2026-07-24CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEMICAL CORP
Filing Date
2023-11-13
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing composite oxide supported catalysts exhibit low selectivity in propane dehydrogenation to propylene, and their preparation process is complex and costly.

Method used

A composite support complex containing Al and a certain group IVB metal element is used as the support complex for preparation. The support complex contains alumina and group IVB metal, and the particle size distribution is 3-35 micrometers, preferably 5-20 micrometers. The preparation method includes forming an alkaline solution, aging, drying and calcining to prepare a catalyst with high activity and stability.

Benefits of technology

It improves the selectivity of propylene, with a single-pass yield of over 36%, and has good catalyst stability. The preparation method is simple and efficient.

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Abstract

The application discloses a carrier composite, a preparation method and application of the carrier composite, a catalyst, a preparation method and application of the catalyst, and a low-carbon alkane dehydrogenation method. The carrier composite comprises Al and a group IVB metal element, and the physicochemical characteristics of the carrier composite include that the particle size distribution range is 3-35 microns in terms of Dx(50). The carrier of the application has the advantages of excellent particle size distribution and specific theta alumina crystal form. The catalyst prepared by using the carrier of the application is used for low-carbon alkane dehydrogenation, in particular, propane dehydrogenation conversion. Under the conditions that the reaction temperature is 500-650 DEG C, the reaction pressure is 0.1-3 MPa, the mass space velocity (WHSV) is 0.1-3 hours ‑1 , and the catalyst is contacted, the dehydrogenation reaction occurs, the selectivity of propylene is higher than 90%, and the single-pass yield reaches more than 36%.
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Citation Information

Patent Citations

  • A composite supported catalyst for propane dehydrogenation to propylene and its preparation method

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  • Catalyst used for preparing propylene by propane dehydrogenation and having high carbon deposition resistance and preparation method thereof

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  • Composite material and preparation method thereof, catalyst and preparation method and application thereof, and method for preparing propylene through propane dehydrogenation

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