Invention Grant
- Patent Title: Prevention of precipitation from nitrated aromatic crude products
- Patent Title (中): 防止硝化芳烃原油产生的沉淀
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Application No.: US13362607Application Date: 2012-01-31
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Publication No.: US08637712B2Publication Date: 2014-01-28
- Inventor: Holger Allardt , Andreas Raichle , Reiner Reetz , Johannes Büttner , Michael Zöllinger , Stefanie Haase , Rüdiger Fritz
- Applicant: Holger Allardt , Andreas Raichle , Reiner Reetz , Johannes Büttner , Michael Zöllinger , Stefanie Haase , Rüdiger Fritz
- 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.
- Main IPC: C07C205/20
- IPC: C07C205/20
Abstract:
Precipitations of nitrohydroxyaromatic salts out of the nitrated crude products obtained in the nitration of aromatic compounds after alkaline scrubbing, for example mononitrotoluenes, are prevented by contacting the nitrated crude products with an acidic ion exchanger. The nitrated crude products are preferably selected from a feedstream to a distillation column, a bottoms circulation stream of a distillation column and a feedstream to a vaporizer.
Public/Granted literature
- US20120197047A1 PREVENTION OF PRECIPITATION FROM NITRATED AROMATIC CRUDE PRODUCTS Public/Granted day:2012-08-02
Information query
