发明授权
- 专利标题: Process for producing a diaryl carbonate
- 专利标题(中): 制备碳酸二芳基酯的方法
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申请号: US814089申请日: 1997-03-10
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公开(公告)号: US5731453A公开(公告)日: 1998-03-24
- 发明人: Keigo Nishihira , Shuji Tanaka , Yuki Nishida , Hirofumi Ii , Satoru Fujitsu , Katsumasa Harada , Ryoji Sugise , Koichi Kashiwagi , Takashi Doi
- 申请人: Keigo Nishihira , Shuji Tanaka , Yuki Nishida , Hirofumi Ii , Satoru Fujitsu , Katsumasa Harada , Ryoji Sugise , Koichi Kashiwagi , Takashi Doi
- 申请人地址: JPX Ube
- 专利权人: Ube Industries, Ltd.
- 当前专利权人: Ube Industries, Ltd.
- 当前专利权人地址: JPX Ube
- 优先权: JPX8-054971 19960312; JPX8-145849 19960607
- 主分类号: C07C67/02
- IPC分类号: C07C67/02 ; C07C67/03 ; C07C68/00 ; C07C69/36 ; C07C69/96
摘要:
A diaryl carbonate with a high degree of purity is produced at a high yield by (A) subjecting (a) a diaryl oxalate and a phenol compound or (b) an alkylaryl oxalate to transesterification reaction in one or two stages in the presence of a catalyst to prepare a diaryl oxalate, while removing a by-product from the reaction system; (B) collecting the diaryl oxalate from the resultant reaction product mixture of the step (A); (C) subjecting the diaryl oxalate to a decarbonylation reaction, preferably in the presence of a phosphorous compound-containing catalyst, to convert the diaryl oxalate to a corresponding diaryl carbonate, while removing a reaction by-product comprising carbon monoxide from the reaction system; and (D) collecting the diaryl carbonate from the reaction product mixture of the step (C).