A copper-chromium catalyst, its preparation method and application

The preparation of copper-chromium catalysts by electrospinning and tableting technology solved the problem of difficult forming of copper-chromium catalysts, improved the mechanical strength and reaction performance of the catalysts, and achieved high catalyst conversion and selectivity.

CN122164429APending Publication Date: 2026-06-09CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEMICAL CORP
Filing Date
2024-12-09
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Copper-chromium catalysts are difficult to form, and their strength and wear resistance are insufficient, causing the catalysts to pulverize and collapse at high space velocities, which affects industrial applications.

Method used

A copper-chromium catalyst precursor was prepared by electrospinning polylactic acid with soluble copper salts combined with trimesic acid treatment. The precursor was then pressed into tablets, and graphite was added as a molding aid to improve the mechanical strength and bulk density of the catalyst.

Benefits of technology

The prepared copper-chromium catalyst has high side pressure strength and low packing density, which improves the catalyst conversion and selectivity. It is suitable for the hydrogenation of dimethyl maleate to prepare 1,4-butanediol and γ-butyrolactone.

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Abstract

This invention discloses a copper-chromium catalyst, its preparation method, and its application. The preparation method of the catalyst includes: (1) mixing polylactic acid with dichloromethane and ethanol to obtain a polymer solution, adding a soluble copper salt to it, stirring, and obtaining a spinning solution; (2) using a coaxial electrospinning nozzle to perform electrospinning with the obtained spinning solution, and collecting the obtained solid; (3) placing the obtained solid in an ethanol solution of trimesic acid to react, washing and drying after the reaction, and collecting the obtained solid; (4) dissolving a soluble chromium salt in ethanol and reacting it with the obtained solid, then washing and drying, and collecting the obtained catalyst precursor; (5) calcining the obtained catalyst precursor to obtain an unformed catalyst, then pressing it into tablets to obtain the copper-chromium catalyst. This catalyst can improve the conversion rate and selectivity of the catalyst in the hydrogenation of dimethyl maleate to prepare 1,4-butanediol and co-production of γ-butyrolactone and tetrahydrofuran.
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