三光气法合成间苯二亚甲基二异氰酸酯研究

Study on m-xylylene diisocyanate synthesis with triphosgene

采用无毒的三光气代替光气与间苯二甲胺反应,合成了间苯二亚甲基二异氰酸酯。考察了原料的摩尔比、反应温度、反应时间和氮气气速的影响。结果表明,间苯二甲胺和三光气的摩尔比为1.25∶1.0,用10m L·min-1的氮气连续通入反应体系,反应温度为130℃,反应时间为6.0 h,间苯二亚甲基二异氰酸酯的产率为80.65%。

The synthesis of m-xylylene diisocyanate（MXDI） from m-xylylenediamine（MXDA） and triphosgene（BTC） substitute material was studied.Factors such as molar ratio of raw materials,reaction temperature,reaction time and nitrogen rate were also studied.The optimal conditions was that the molar ratio to MXDA and BTC was 1.25： 1.0,the reaction system was purged with nitrogen at a rate 10 m L·min-1,the reaction temperature was 130℃ and the reaction time was 6.0 h.Under the optimum condition,the MXDI yield was 80.65%.