Circulating preparation method of phosgene and device system thereof

• Main Authors: QIU GUISEN, LIU WENJIE, LU CHENGLIANG
• Format: Patent
• Language: Chinese; English
• Published: 27.12.2022
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS

The invention provides a cyclic preparation method of phosgene, which comprises the following steps: in a device system loaded with a catalyst, carrying out catalytic decomposition reaction on a raw material feed flow through the catalyst to obtain phosgene, the raw material comprises a raw material solution of triphosgene and/or diphosgene; the catalyst comprises an ion resin catalyst; the device system comprises the double-jacket pipeline reactor. According to the method, the phosgene is prepared from triphosgene and/or diphosgene by adopting a specific type of catalyst and a device system with a specific structure, so that the yield of the obtained phosgene is high, the solvent residual quantity is small, the production speed is high, the safety is good, the process is simple, and the cyclic utilization of resources can be realized. 本发明提供了一种光气的循环制备方法，包括以下步骤：在装载有催化剂的装置系统中，将原料进料流经催化剂进行催化分解反应，得到光气；原料包括三光气和/或双光气的原料溶液；催化剂包括离子树脂催化剂；装置系统包括双夹套管道反应器。本发明中，通过采用特定种类的催化剂以及特定结构的装置系统，由三光气和/或双光气制备光气，所得光气收率高、溶剂残留量少且生产速度快，且