Process and catalyst for oxidative esterification using a catalyst with high mechanical strength and chemical resistance.

A noble metal-supported silicon carbide catalyst addresses the issues of low acid resistance and mechanical robustness in conventional catalysts by providing high selectivity and stability in producing methyl methacrylate, reducing by-products and extending catalyst life.

JP7884499B2Active Publication Date: 2026-07-03DOW GLOBAL TECHNOLOGIES LLC +1
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Patent Information

Application Number
JP2023500431
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2020-07-14
Filing Date
2021-07-13
Publication Date
2026-07-03
Estimated Expiration
2041-07-13

AI Technical Summary

Technical Problem

Conventional catalysts for producing methyl methacrylate from methacrolein and methanol suffer from low acid resistance, leading to neutralization with bases, and lack mechanical robustness and chemical stability, resulting in high by-product formation.

Method used

A catalyst comprising a noble metal, such as gold, supported on a silicon carbide carrier with a high surface area, which maintains activity in acidic or basic environments and reduces by-product formation.

Benefits of technology

The catalyst exhibits high selectivity and stability, with minimal wear and reduced by-product formation, maintaining activity over extended periods without the need for base neutralization.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

A catalyst containing a noble metal disposed on a carrier. The noble metal is present in an amount in the range of 0.1 wt% to 10 wt% based on the total weight of the catalyst. The carrier contains at least 50 wt% of silicon carbide based on the total weight of the carrier. The silicon carbide has a surface area of at least 5 m 2 / g. A method for preparing methyl methacrylate from methacrolein and methanol using the catalyst is also disclosed.
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Citation Information

Patent Citations

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  • Use of sic as carrier in pd catalyst reaction in liquid phase, supported pd catalyst using sic as carrier, method for manufacturing same, and coupling reaction using same

    WO2014061087A1