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公开(公告)号：EP3904336A1
公开(公告)日：2021-11-03
申请号：EP18944569.5
申请日：2018-12-26
发明人： HUA, Weiqi , LI, Tonghe , SHANG, Yonghua , SUN, Shuchang , WANG, Jingxu , HAN, Jinping , LI, Qiang , LI, Wenbin , LI, Jing , WANG, Pengfei , LI, Yuan
IPC分类号： C07C263/10 , C07C265/00
摘要： Disclosed is a method for preparing an isocyanate in a gaseous phase, comprising feeding, in the presence or absence of an inert gas, an amine-containing gas stream and a phosgene-containing gas stream into a reaction region, allowing the amine and the phosgene to contact in gaseous forms and undergo a phosgenation reaction in the reaction region, thus preparing the target isocyanate in a gaseous form in the reaction region. The phosgene-containing stream is subjected to preheating and warming before being fed into the reaction region, and the phosgene-containing stream comprises a substance A at a mass fraction of
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