A catalyst for preparing methyl phenylcarbamate, a preparation method and application thereof

By using a heterogeneous catalyst composed of a specific support and transition metal salt, the problems of high catalyst cost and poor stability in the synthesis of methyl phenylcarbamate (MPC) in the prior art have been solved, and an efficient and stable mixed urea-ethanololysis process has been achieved, which improves the yield and selectivity of MPC.

CN116586071BActive Publication Date: 2026-06-16INSTITUTE OF PROCESS ENGINEERING CHINESE ACADEMY OF SCIENCES
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INSTITUTE OF PROCESS ENGINEERING CHINESE ACADEMY OF SCIENCES
Filing Date
2023-05-25
Publication Date
2026-06-16

AI Technical Summary

⚠Technical Problem

In the existing technology, the synthesis methods of methyl phenylcarbamate have problems such as high catalyst cost, poor stability, environmental unfriendliness and low MPC yield. In particular, heterogeneous catalysts have low selectivity and are easy to deactivate, and the efficient alcoholysis process of mixed urea is not yet mature.

⚗Method used

Heterogeneous catalysts using specific supports and transition metal salt combinations are prepared by reacting mixed urea with methanol to produce highly active and stable catalysts. These catalysts include alumina, silica, or magnesium oxide as supports, and chlorides or nitrates of transition metal salts such as Ce, Zr, Zn, Mn, Ti, Ni, or Co, combined with precipitants such as urea. After calcination, these catalysts are applied to the synthesis of mixed urea.

🎯Benefits of technology

A high conversion rate (>98.5%) and high yield (>98%) of mixed urea to synthesize methyl phenylcarbamate was achieved. The catalyst has good stability and is suitable for highly selective synthesis. Furthermore, the stability and service life of the catalyst were improved through specific combinations.

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Abstract

The application provides a catalyst for preparing methyl phenylcarbamate, a preparation method and application of the catalyst, and the preparation method comprises the following steps: mixing a carrier, a transition metal salt, a precipitant and water for reaction, and then filtering, drying and calcining, so that the catalyst is obtained. The catalyst provided by the application is applied to the synthesis of methyl phenylcarbamate from mixed urea, the conversion rate of the mixed urea is greater than 98.5%, the yield of the methyl phenylcarbamate is greater than 98%, the catalyst has high activity and good stability, and the high-selectivity synthesis of the methyl phenylcarbamate from the mixed urea is realized.
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