申请人:Fukuoka Shinsuke
公开号:US20090118530A1
公开(公告)日:2009-05-07
It is an object of the present invention to provide a specific process that enables an aromatic carbonate required for producing a high-quality high-performance aromatic polycarbonate to be produced industrially in a large amount (e.g. not less than 1 ton/hr) stably for a prolonged period of time (e.g. not less than 1000 hours, preferably not less than 3000 hours, more preferably not less than 5000 hours) from a cyclic carbonate and an aromatic monohydroxy compound. When producing an aromatic carbonate from a cyclic carbonate and an aromatic monohydroxy compound, the above object can be attained by carrying out a step of: (I) producing a dialkyl carbonate and a diol using a reactive distillation column having a specified structure, and (II) producing the an aromatic carbonate using a first reactive distillation column having a specified structure.
本发明的目的是提供一种特定的工艺,能够从环状碳酸酯和芳香单醇化合物中大规模(例如不少于1吨/小时)稳定地生产所需的芳香族碳酸酯,以生产高质量、高性能的芳香族聚碳酯,生产时间可持续很长(例如不少于1000小时,更好地不少于3000小时,更好地不少于5000小时)。当从环状碳酸酯和芳香单醇化合物生产芳香族碳酸酯时,可以通过执行以下步骤实现上述目的:(I)使用具有指定结构的反应蒸馏柱生产二烷基碳酸酯和二元醇,(II)使用具有指定结构的第一反应蒸馏柱生产芳香族碳酸酯。