Invention Grant
- Patent Title: Process for the production of nitrobenzene by adiabatic nitration
- Patent Title (中): 通过绝热硝化生产硝基苯的方法
-
Application No.: US14415794Application Date: 2013-07-23
-
Publication No.: US09284256B2Publication Date: 2016-03-15
- Inventor: Thomas Knauf , Michael Merkel
- Applicant: Bayer MaterialScience AG
- Applicant Address: DE Leverkusen
- Assignee: Bayer MaterialScience AG
- Current Assignee: Bayer MaterialScience AG
- Current Assignee Address: DE Leverkusen
- Agent Donald R. Palladino
- Priority: EP12178161 20120727
- International Application: PCT/EP2013/065506 WO 20130723
- International Announcement: WO2014/016292 WO 20140130
- Main IPC: C07C201/00
- IPC: C07C201/00 ; C07C201/08 ; C07C201/16

Abstract:
The present invention provides a continuous process for the production of nitrobenzene by nitration of benzene with mixtures of sulfuric and nitric acid using a stoichiometric excess of benzene, in which the content of aliphatic organic compounds in the feed benzene during the start-up period of the production plant is always maintained at less than 1.5 wt. %, based on the total mass of the feed benzene. This is achieved either by mixing the feed benzene comprising recycled unreacted benzene (recycled benzene) and benzene newly supplied to the reaction (fresh benzene) in appropriate quantitative ratios during the start-up period, depending on the purity of the two streams, or by completely omitting the recycling of unreacted benzene during the start-up period, i.e. the feed benzene consists only of benzene newly supplied to the reaction.
Public/Granted literature
- US20150166460A1 PROCESS FOR THE PRODUCTION OF NITROBENZENE BY ADIABATIC NITRATION Public/Granted day:2015-06-18
Information query