发明授权
- 专利标题: Preparation of isocyanates having a light color
- 专利标题(中): 具有浅色异氰酸酯的制备
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申请号: US40673申请日: 1998-03-18
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公开(公告)号: US5872278A公开(公告)日: 1999-02-16
- 发明人: Rupert Kraus , Martin Reif , Bernd Bruchmann , Helmut Tesch
- 申请人: Rupert Kraus , Martin Reif , Bernd Bruchmann , Helmut Tesch
- 申请人地址: DEX Ludwigshafen
- 专利权人: BASF Aktiengesellschaft
- 当前专利权人: BASF Aktiengesellschaft
- 当前专利权人地址: DEX Ludwigshafen
- 优先权: DEX19711447.4 19970319
- 主分类号: C07C263/10
- IPC分类号: C07C263/10 ; C07C265/14 ; C08G18/76 ; C07K118/02
摘要:
In a process for preparing isocyanates having a light color by reacting the corresponding amines with phosgene, the amines are treated with solid inorganic substances containing Lewis acid and/or Bronsted acid centers prior to the reaction with the phosgene.
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