申请人:MITSUBISHI GAS CHEMICAL COMPANY, INC.
公开号:EP0492145A2
公开(公告)日:1992-07-01
Xylylen diisocyanate is produced in higher space-time yield with higher selectivity by thermal decomposition of xylylene dicarbamate as an urethane compound, i.e. by subjecting the urethane compound to reactive distillation with a thermal decomposition catalyst of at least one of metals selected from antimony and tin or their compounds in the presence of an inert solvent having a higher boiling point than that of the resulting xylylene diisocyanate under reduced pressure of 1 to 500 mmHg and at 150° to 350°C and then subjecting the resulting reaction products as distillates to partial condensation outside the reactive distillation system, thereby separately recovering the resulting alcohol and xylylene diisocyanate.
通过热分解作为氨基甲酸乙酯化合物的二氨基甲酸二异氰酸酯,以更高的时空产率和更高的选择性生产二异氰酸酯,即在 1 至 500 mmHg 的减压和 150 至 350°C 的温度下,在惰性溶剂的存在下,用选自锑和锡或它们的化合物中至少一种金属的热分解催化剂,将氨基甲酸乙酯化合物进行反应蒸馏,然后将生成的反应产物作为蒸馏物在反应蒸馏系统外进行部分冷凝,从而分别回收生成的醇和二异氰酸酯。