一种安全有效的合成芳基异氰酸酯的方法

A Safe and Effective Method for Preparation of AromaticIsocyanates Using Bis(trichloromethyl) Carbonate

将伯芳胺或其溶液滴加到双 (三氯甲基 )碳酸酯溶液中 ,经回流反应合成了相应的芳基异氰酸酯。与光气法相比 ,该法是一种安全、方便、环境友好、收率 (87.6 %～ 98.2 % )及纯度 (93.6 %～99.1% )

A series of aromatic isocyanates were synthesized by adding dropwise corresponding arylamines into the solution of bis(trichloromethyl) carbonate (BTC) and refluxing. In comparison with the phosgene method, the BTC method has such advantages as operationally safe and convenient, environmentally friendly, product yield and purity high, and economical.