The invention discloses a method for preparing N, Napos through a micro-channel reaction. Process for the preparation of-(carbonyl bis (4, 1-phenylene)) bis (3-nitrobenzamide)

In the process of preparing N,N'-(carbonylbis(4,1-phenylene))bis(3-nitrobenzamide), a continuous flow microchannel reactor and ethylene glycol butyl ether solvent were used to solve the problems of many by-products and inaccurate temperature control in the prior art, and a high-efficiency, environmentally friendly and low-cost production process was achieved.

CN119661393APending Publication Date: 2025-03-21SHANDONG YANGGU HUATAI CHEM
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Patent Information

Application Number
CN202411809743.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-10
Publication Date
2025-03-21

AI Technical Summary

Technical Problem

In the prior art, the method of preparing N,N'-(carbonylbis(4,1-phenylene))bis(3-nitrobenzamide) has problems such as many by-products, inaccurate temperature control, inaccurate drop acceleration and difficult treatment of three wastes, resulting in large production safety hazards, high costs and serious environmental pollution.

Method used

A continuous flow microchannel reactor is used, and ethylene glycol butyl ether is used as a solvent to mix reactions through microchannel 1 and microchannel 2 in the microchannel reactor. The reaction conditions are controlled to achieve a uniform reaction, few by-products, and high yields. The solvent is recovered by decompression distillation and marked as an environmentally friendly solvent.

Benefits of technology

It achieves a more uniform reaction, fewer by-products, high yield, high safety, low production cost, suitable for industrial production, and the recycling of environmentally friendly solvents reduces environmental pollution.

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Abstract

The invention relates to a method for preparing N, N '-(carbonyl bis (4, 1-phenylene)) bis (3-nitrobenzamide) through a microchannel reaction, the N, N'-(carbonyl bis (4, 1-phenylene)) bis (3-nitrobenzamide) is prepared by using a continuous flow microchannel reactor and ethylene glycol butyl ether as a solvent, the reaction is more uniform, few by-products are produced, the yield is high, continuous reaction can be realized, and the method is suitable for industrial production. Meanwhile, a solvent adopted in the reaction can be recycled after reduced pressure distillation, and the solvent is marked as an environment-friendly solvent and has relatively good safety; the preparation method has the advantages of mild preparation conditions, low production cost, easiness in batch and large-scale production, strong universality, good industrial production basis and wide application prospect.
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