An integrated process for the preparation of aromatic mono- and polyisocyanates from aromatic amines
申请人:ARCO CHEMICAL TECHNOLOGY INC.
公开号:EP0391716A1
公开(公告)日:1990-10-10
A multi-step process for the preparation of aromatic mono- and polyisocyanates in which an aromatic mono- or polyamine and isocyanic acid are reacted to form an aromatic urea which is then reacted with a dialkyl amine to give an aromatic dialkyl urea product. The aromatic dialkyl urea is thermally treated in an inert organic solvent in the presence of a reaction promoter to produce the isocyanate.
一种制备芳香单异氰酸酯和多异氰酸酯的多步骤过程,其中芳香单元或多元胺与异氰酸反应形成芳香脲,然后再与二烷基胺反应形成芳香二烷基脲产物。在反应促进剂的存在下,在惰性有机溶剂中热处理芳香二烷基脲,以产生异氰酸酯。