发明授权
- 专利标题: Process for the purification of diphenyl carbonate
- 专利标题(中): 纯化碳酸二苯酯的方法
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申请号: US465135申请日: 1995-06-05
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公开(公告)号: US5495038A公开(公告)日: 1996-02-27
- 发明人: Hans-Josef Buysch , Christine Mendoza-Frohn , Johann Rechner , Norbert Schon
- 申请人: Hans-Josef Buysch , Christine Mendoza-Frohn , Johann Rechner , Norbert Schon
- 申请人地址: DEX Leverkusen
- 专利权人: Bayer Aktiengesellschaft
- 当前专利权人: Bayer Aktiengesellschaft
- 当前专利权人地址: DEX Leverkusen
- 优先权: DEX4420778.6 19940615
- 主分类号: C07C68/08
- IPC分类号: C07C68/08 ; C07C69/96
摘要:
This invention provides a process for the purification of diphenyl carbonate (DPC) from crude products of diphenyl carbonate production. In this process, crude products are used that have a distillable fraction consisting of over 70 wt. % diphenyl carbonate and are fractionally crystallised from the melt (fractionating melt crystallisation).
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