- 专利标题： Catalyst system for polycarbonate manufacture
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申请号： US597420申请日： 1996-02-08
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公开(公告)号： US5744416A公开(公告)日： 1998-04-28
- 发明人: Larry I. Flowers , Paul D. Sybert , David L. Ramsey
- 申请人： Larry I. Flowers , Paul D. Sybert , David L. Ramsey
- 申请人地址： MA Pittsfield
- 专利权人： General Electric Company
- 当前专利权人： General Electric Company
- 当前专利权人地址： MA Pittsfield
- 主分类号： C08G64/14
- IPC分类号： C08G64/14 ; C08G63/79 ; C08G64/20 ; C08G64/22 ; C08G64/24 ; B01J31/00
摘要：
A method is provided for making polycarbonates utilizing an effective amount of a binary phase transfer catalyst, such as tetrabutylammonium bromide and a methyl tertiary amine as a condensation catalyst during the interfacial phosgenation of a bisphenol, such as bisphenol A. Improved phosgene utilization is achieved.
公开/授权文献
- US4562895A Motor vehicle engine cooling arrangement 公开/授权日：1986-01-07
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