Important Green Chemistry and Catalysis： Non-phosgene Syntheses of Isocyanates - Thermal Cracking Way  

作　　者：Peixue Wang Shimin Liu Youquan Deng 

机构地区：[1]Centre for Green and Catalysis, State Key Laboratory for Oxo Synthesis and Selective Oxidation, State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China [2]Qingdao Center of Resource Chemistry & New Materials, Qingdao, Shandong 266100, China

出　　处：《Chinese Journal of Chemistry》2017年第6期821-835,共15页中国化学（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China （No. 21173240）.

摘　　要：Currently, industrial production of isocyanates, or diisocyanates in particular, has been exclusively based on phosgene processes. Phosgene is extremely toxic and large amounts of corrosive HC1 are produced as a side product. In the view of environment protection and society safety, development of non-phosgene processes for isocyanates production will be highly desired, and this should be one of the most important missions for green chemistry and catalysis. In this review, efforts for development of non-phosgene method for syntheses of isocyanates, i.e., catalytic syntheses of N-substituted carbamates from nitro- or amino-compounds with CO, dimethyl carbonate （DMC）, urea and even CO2 etc. as carbonyl sources, then thermal cracking of N-substituted carbamates to afford corresponding i socyanates, are summarized, and a brief prospect for non-phosgene syntheses of isocyanates is also addressed.Currently, industrial production of isocyanates, or diisocyanates in particular, has been exclusively based on phosgene processes. Phosgene is extremely toxic and large amounts of corrosive HC1 are produced as a side product. In the view of environment protection and society safety, development of non-phosgene processes for isocyanates production will be highly desired, and this should be one of the most important missions for green chemistry and catalysis. In this review, efforts for development of non-phosgene method for syntheses of isocyanates, i.e., catalytic syntheses of N-substituted carbamates from nitro- or amino-compounds with CO, dimethyl carbonate （DMC）, urea and even CO2 etc. as carbonyl sources, then thermal cracking of N-substituted carbamates to afford corresponding i socyanates, are summarized, and a brief prospect for non-phosgene syntheses of isocyanates is also addressed.

关 键 词：NON-PHOSGENE N-substituted carbamates ISOCYANATES carbonylation agent CATALYSIS 

分 类 号：TQ226.63[化学工程—有机化工] TQ323.41