发明申请
- 专利标题： PROCESS FOR THE PRODUCTION OF ISOCYANATES, PREFERABLY DIISOCYANATES AND POLYISOCYANATES WITH SOLVENT RECIRCULATION
- 专利标题（中）： 生产异氰酸酯，优选二异氰酸酯和溶剂回收的聚异氰酸酯的方法
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申请号： US13380680申请日： 2010-06-16
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公开(公告)号： US20120101299A1公开(公告)日： 2012-04-26
- 发明人: Heiner Schelling , Ulrich Penzel , Eckhard Stroefer , Matthias Eiermann , Jon S. Speier , Kai Thiele , Michael Bock
- 申请人： Heiner Schelling , Ulrich Penzel , Eckhard Stroefer , Matthias Eiermann , Jon S. Speier , Kai Thiele , Michael Bock
- 申请人地址： DE Ludwigshafen
- 专利权人： BASF SE
- 当前专利权人： BASF SE
- 当前专利权人地址： DE Ludwigshafen
- 国际申请： PCT/EP10/58421 WO 20100616
- 主分类号： C07C263/10
- IPC分类号： C07C263/10
摘要：
The present invention relates to a process for the production of isocyanates, preferably diisocyanates and polyisocyanates of the diphenylmethane series (MDI), by reacting an amine with phosgene in the liquid phase or in the gas phase to form the corresponding isocyanates, subsequent removal of the solvent in at least two steps to obtain at least two solvent streams, individual treatment of the at least two solvent streams, and re-circulation of at least a portion of the solvent streams.
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