发明申请
- 专利标题： PROCESS FOR PURIFYING DIALKYL CARBONATES
- 专利标题（中）： 纯化碳酸氢钠的方法
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申请号： US12944943申请日： 2010-11-12
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公开(公告)号： US20110144371A1公开(公告)日： 2011-06-16
- 发明人: Pieter Ooms , Friedhelm Risse , Andre Düx , Carsten Buchaly , Thomas Pancur , Arthur Susanto , Georg Ronge , Johan Vanden Eynde , Wim Wuytack
- 申请人： Pieter Ooms , Friedhelm Risse , Andre Düx , Carsten Buchaly , Thomas Pancur , Arthur Susanto , Georg Ronge , Johan Vanden Eynde , Wim Wuytack
- 申请人地址： DE Leverkusen
- 专利权人： Bayer MaterialScience AG
- 当前专利权人： Bayer MaterialScience AG
- 当前专利权人地址： DE Leverkusen
- 优先权： DE102009053370.2 20091114
- 主分类号： C07C68/08
- IPC分类号： C07C68/08
摘要：
The present invention relates to a special process for purifying dialkyl carbonates. In particular, the present invention relates to a continuous process for purifying a dialkyl carbonate/alcohol-mixture in the preparation of lower dialkyl carbonate by catalysed transesterification of a cyclic alkylene carbonate (e.g. ethylene carbonate or propylene carbonate) with lower alcohols. To optimize the economics and energy efficiency of the process, an apparatus for intermediate heating of the internal liquid stream is used.