A green synthesis system for continuously preparing methacrylonitrile

The green synthesis system using continuous catalytic reaction and distillation units has solved the problems of poor high-temperature selectivity and high environmental protection costs in the synthesis of methacrylonitrile, and has achieved efficient and energy-saving production of methacrylonitrile.

CN224485931UActive Publication Date: 2026-07-14SHANGHAI XUENTIAN TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHANGHAI XUENTIAN TECHNOLOGY CO LTD
Filing Date
2025-07-28
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

Existing methacrylonitrile synthesis processes suffer from poor selectivity under high-temperature reaction conditions, large amounts of byproducts generated, difficulty in controlling process parameters, and high environmental governance costs, leading to industrialization bottlenecks and economic degradation.

Method used

A green synthesis system employing a continuous catalytic reaction unit and a distillation unit generates methacrylonitrile by reacting acetone cyanohydrin with acid anhydride on the catalyst surface, and the by-product carboxylic acid is recycled, thus achieving continuous production.

Benefits of technology

The system enables efficient, energy-saving, and environmentally friendly production of methacrylonitrile under normal pressure, reducing production costs, simplifying the separation process, and improving product purity and yield.

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Abstract

The utility model discloses a kind of green synthesis system of continuous preparation methacrylonitrile.The system includes reaction unit, separation and purification unit and circulation unit, it is with continuous catalytic reaction device as core equipment, realized the synthesis process that acetone cyanhydrin and acid anhydride are rapidly generated methacrylonitrile on the surface of catalyst at high temperature.Subsequent separation and purification unit is obtained with rectification purification high-purity methacrylonitrile, circulation unit is used simultaneously, and carboxylic acid byproduct of reaction is converted into acid anhydride by dehydration reaction and continues to be used in reaction unit in circulation.The system compact structure, material flow energy flow is matched reasonably, is a set of energy saving and environmental protection, economic and efficient green technology.
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