Bio-based fatty acid methyl ester hydrogenation catalyst as well as preparation method and application thereof

Through co-precipitation method and a method of limiting pH, a bio-based fatty acid methyl ester hydrogenation catalyst with a specific microstructure was prepared, which solved the problem of toxic metals Cr and poor stability in the catalyst in the prior art, and achieved efficient fatty acid methyl ester hydrogenation reaction and improved the stability of the catalyst.

CN119701972AActive Publication Date: 2025-03-28CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Application Number
CN202311275724.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-09-28
Publication Date
2025-03-28
Estimated Expiration
2043-09-28

AI Technical Summary

Technical Problem

In the prior art, the catalyst used for the hydrogenation reaction of fatty acid methyl ester contains metal Cr with high toxicity, and the reaction efficiency is affected by the types and proportions of low-carbon alcohols, resulting in poor stability of the catalyst.

Method used

By co-precipitation method and the pH value during the reaction process, a bio-based fatty acid methyl ester hydrogenation catalyst with a specific microstructure was prepared, which avoided the aggregation of copper active components and improved the stability and activity of the catalyst.

Benefits of technology

The simplicity and applicability of preparing catalysts under industrial production conditions have been achieved, the raw material conversion rate of the methyl ester hydrogenation reaction of bio-based fatty acids and the selectivity of the target product fatty alcohols are improved, and the stability of the catalyst has been significantly improved.

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Abstract

The invention relates to a bio-based fatty acid methyl ester hydrogenation catalyst and a preparation method and application thereof.The method comprises the following steps that S1, under the stirring condition, a first solution containing a first metal source and a second metal source, a second solution containing an alkali source and water are contacted and subjected to a first reaction, and a first material is obtained; s2, adjusting the pH value of the first material to 10-11, and carrying out a second reaction to obtain a pre-product; s3, carrying out heat treatment on the pre-product; the first metal source comprises a copper source and an aluminum source, and the second metal source comprises a zinc source and / or a magnesium source; the step S1 is carried out under the condition that the pH value is 8-10. The method disclosed by the invention is simple in steps and conditions, avoids the use of complex reaction instruments and is suitable for industrial production, and the ester hydrogenation catalyst prepared by the method disclosed by the invention is used for hydrogenation reaction of bio-based fatty acid methyl ester, can obtain relatively high raw material conversion rate and target product fatty alcohol selectivity, and has relatively good stability.
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