Invention Grant
- Patent Title: Process for the purification of aniline from gas phase hydrogenations
- Patent Title (中): 从气相氢化中纯化苯胺的方法
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Application No.: US14385822Application Date: 2013-03-18
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Publication No.: US09447021B2Publication Date: 2016-09-20
- Inventor: Michael Merkel , Peter Lehner , Bastian Mahr , Amgad Salah Moussa
- Applicant: Bayer Intellectual Property GmbH
- Applicant Address: DE Leverkusen
- Assignee: Covestro Deutschland AG
- Current Assignee: Covestro Deutschland AG
- Current Assignee Address: DE Leverkusen
- Agent N. Denise Brown
- Priority: EP12160920 20120323
- International Application: PCT/EP2013/055566 WO 20130318
- International Announcement: WO2013/139737 WO 20130926
- Main IPC: C07C209/84
- IPC: C07C209/84 ; C07C209/36
Abstract:
The present invention relates to a process for the purification of aniline which originates from gas phase hydrogenations. In this process, only a minimum proportion of the aniline has to be evaporated and condensed again. The process is highly efficient in removing compounds which have phenolic hydroxyl groups and results in minimal losses of aniline. This process also reduces the unwanted coupling mechanisms in the division of the overall crude product in the fraction condensation into individual substreams and the subsequent workup of these.
Public/Granted literature
- US20150080610A1 PROCESS FOR THE PURIFICATION OF ANILINE FROM GASE PHASE HYDROGENATIONS Public/Granted day:2015-03-19
Information query
