Invention Grant
- Patent Title: Process for preparing aromatic isocyanates
- Patent Title (中): 制备芳族异氰酸酯的方法
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Application No.: US13057869Application Date: 2009-08-06
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Publication No.: US08829232B2Publication Date: 2014-09-09
- Inventor: Ulrich Penzel , Torsten Mattke , Andreas Wölfert , Johannes Jacobs , Tsung-Chieh Cheng , Kerstin Heinen , Eckhard Stroefer , Stefan Maixner , Wolfgang Mackenroth , Christian Tragut , Kai Thiele , Myung Un Won
- Applicant: Ulrich Penzel , Torsten Mattke , Andreas Wölfert , Johannes Jacobs , Tsung-Chieh Cheng , Kerstin Heinen , Eckhard Stroefer , Stefan Maixner , Wolfgang Mackenroth , Christian Tragut , Kai Thiele , Myung Un Won
- Applicant Address: DE Ludwigshafen
- Assignee: BASF SE
- Current Assignee: BASF SE
- Current Assignee Address: DE Ludwigshafen
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: EP08161976 20080807
- International Application: PCT/EP2009/060184 WO 20090806
- International Announcement: WO2010/015667 WO 20100211
- Main IPC: C07C263/00
- IPC: C07C263/00 ; C07C263/10

Abstract:
The invention relates to a process for preparing isocyanates by reacting the corresponding amines with phosgene in the liquid phase, if appropriate in the presence of at least one inert medium, in which the amine and the phosgene are first mixed in a mixing chamber (1) to give a reaction mixture and the reaction mixture is fed to a reactor, the amine being added through an orifice (3) arranged coaxially to the mixing chamber (1) and the phosgene being added through feed orifices (5) in at least two planes (7, 9) arranged at right angles to the axis (11) of the mixing chamber (1), or the phosgene being added through the orifice (3) arranged coaxially to the mixing chamber and the amine through the feed orifices (5) in at least two planes (7, 9) arranged at right angles to the axis (11) of the mixing chamber (1). At least one plane (9) is arranged upstream and at least one plane (7) downstream of the orifice (3) arranged coaxially to the mixing chamber (1) in main flow direction of the reaction mixture. The mean residence time of the reaction mixture in the mixing chamber (1) is not more than 20 ms.
Public/Granted literature
- US20110251425A1 PROCESS FOR PREPARING AROMATIC ISOCYANATES Public/Granted day:2011-10-13
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