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公开(公告)号:US5688988A
公开(公告)日:1997-11-18
申请号:US671179
申请日:1996-06-27
IPC分类号: C07B61/00 , C07C269/04 , C07C271/26 , C07C261/00
CPC分类号: C07C269/04
摘要: A process is described for the preparation of aromatic urethanes in which organic carbonate in a stoichiometric quantity or in a quantity higher than the stoichiometric value is reacted with an aromatic amine operating in the presence of a carbamation catalyst, wherein this catalyst is selected from zinc and/or copper carbonate hydroxide. The process gives high yields and selectivity in the useful reaction product.
摘要翻译: 描述了一种用于制备芳族聚氨酯的方法,其中化学计量量或高于化学计量值的有机碳酸酯与在氨基甲酸酯化催化剂存在下操作的芳族胺反应,其中该催化剂选自锌 和/或碳酸氢铜。 该方法在有用的反应产物中产生高产率和选择性。
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公开(公告)号:US06034265A
公开(公告)日:2000-03-07
申请号:US64166
申请日:1998-04-22
申请人: Aldo Bosetti , Emanuele Cauchi , Vittorio Carletti , Pietro Cesti
发明人: Aldo Bosetti , Emanuele Cauchi , Vittorio Carletti , Pietro Cesti
IPC分类号: B01J31/04 , C07B61/00 , C07C269/04 , C07C271/26 , C07C271/28
CPC分类号: C07C269/04
摘要: A process for synthesizing aromatic urethanes, which entails:a) reacting an organic carbonate, in an amount which is equal to or greater than a stoichiometric amount, with an aromatic amine at a temperature of00 to 190.degree. C.; andb) recovering the aromatic urethane from the reaction mixture, wherein step a) is carried out by maintaining reaction alcohol in an amount of from 10 to 40 mol % based on a total quantity of alcohol coproduced during the reaction.
摘要翻译: 一种合成芳族氨基甲酸酯的方法,其包括:a)使具有等于或大于化学计量的量的有机碳酸酯与芳族胺在100至190℃的温度下反应; 和b)从反应混合物中回收芳族氨基甲酸酯,其中步骤a)通过将反应醇的维持量相对于反应期间共生产的醇的总量为10〜40摩尔%来进行。
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