申请人:Sabic Innovative Plastics IP B.V.
公开号:US08058469B2
公开(公告)日:2011-11-15
The present invention provides methods of forming carbamates, ureas, and isocyanates. In certain embodiments these methods include the step of reacting an amine with an ester-substituted diaryl carbonate to form an activated carbamate which can be further derivitized to form non-activated carbamate or a urea. The urea or carbamate can be subjected to a pyrolysis reaction to form isocyanate.
本发明提供了形成氨基甲酸酯、尿素和异氰酸酯的方法。在某些实施例中,这些方法包括将胺与酯基取代的二芳基碳酸酯反应,形成活性氨基甲酸酯,可以进一步衍生为非活性氨基甲酸酯或尿素。尿素或氨基甲酸酯可以经过热解反应形成异氰酸酯。