Copper-chromium catalyst as well as preparation method and application thereof

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

Application Number
CN202411802041.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
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

The invention discloses a copper-chromium catalyst and a preparation method and application thereof. The preparation method of the catalyst comprises the following steps: (1) mixing polylactic acid with dichloromethane and ethanol to obtain a polymer solution, adding soluble copper salt into the polymer solution, and stirring to obtain a spinning solution; (2) carrying out electrostatic spinning on the obtained spinning solution by using a coaxial electrostatic spinning nozzle, and collecting an obtained solid; (3) putting the obtained solid into an ethanol solution of trimesic acid, reacting, washing and drying after the reaction is finished, and collecting the obtained solid; (4) dissolving a soluble chromium salt in ethanol, reacting with the obtained solid, washing, drying, and collecting the obtained catalyst precursor; and (5) roasting the obtained catalyst precursor to obtain an unformed catalyst, and then tabletting and forming to obtain the copper-chromium catalyst. The catalyst is used in a reaction for preparing 1, 4-butanediol and co-producing gamma-butyrolactone and tetrahydrofuran through dimethyl maleate hydrogenation, and the conversion rate and selectivity of the catalyst can be improved.
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