Magnetic supported cobalt-based catalyst, preparation method and application

By preparing a magnetically supported cobalt-based catalyst and using bio-based chitin as a support, the problems of low yield and poor catalyst stability in the preparation of vanillin from lignin were solved, achieving a green catalytic effect of efficient selective oxidation and easy recovery, thereby enhancing the utilization value of lignin resources.

CN122352259APending Publication Date: 2026-07-10SOUTHEAST UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTHEAST UNIV
Filing Date
2026-04-23
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing processes for preparing vanillin from lignin suffer from low yield, poor catalyst stability, and difficulty in recycling. Traditional methods also present problems of non-renewable resources and environmental pollution.

Method used

A magnetically supported cobalt-based catalyst was developed using bio-based chitin as a support. Cobalt species were prepared via impregnation-calcination to achieve high dispersion and robust loading. Combined with an air oxidant, the catalyst was used for selective oxidation of lignin. The catalyst exhibits magnetic recyclability and high catalytic activity.

Benefits of technology

This method achieves efficient and selective oxidation of aromatic structural units in lignin molecules under complex natural structures, improving the high-value utilization of lignin resources, reducing production costs and environmental pollution, and making the catalyst easy to recover and the operation simple and efficient.

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Abstract

This invention discloses a magnetically supported cobalt-based catalyst, its preparation method, and its application in the selective oxidation of lignin to vanillin, belonging to the field of organic synthesis catalysis. The preparation method of the magnetically supported cobalt-based catalyst includes: dissolving chitin and cobalt precursors in ethanol, stirring and heating to form a homogeneous gel, drying the resulting gel to obtain a catalyst precursor; and calcining the catalyst precursor in air to obtain the magnetically supported cobalt-based catalyst. This catalyst has a stable structure, good dispersibility, and excellent catalytic activity, enabling efficient conversion of lignin in complex lignin systems, independent of lignin model compounds or platform compounds.
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