一种气相光气化反应制备异氰酸酯的方法
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- WANHUA CHEM GRP CO LTD
- Filing Date
- 2022-11-01
- Publication Date
- 2026-07-17
AI Technical Summary
In the existing technology, incomplete high-temperature vaporization of amines leads to equipment blockage, affecting the stable operation of the gas phase phosgenation device, and it is difficult to effectively solve the impact of amine residence time on the vaporization effect.
By controlling the H value content of the organic primary amine to be between 20ppm and 3000ppm, preferably between 150ppm and 2000ppm, and by using heat treatment or adding components that are difficult to vaporize, combined with inert gas protection, the heating temperature and residence time of the amine and phosgene are controlled to ensure complete vaporization and avoid equipment blockage.
It significantly extends the stable operation cycle of the gas phase phosgenation unit, reduces the number of unit maintenance operations and safety risks, and improves the reaction yield.
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