发明授权
- 专利标题： Prevention of precipitation from nitrated aromatic crude products
- 专利标题（中）： 防止硝化芳烃原油产生的沉淀
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申请号： US13362607申请日： 2012-01-31
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公开(公告)号： US08637712B2公开(公告)日： 2014-01-28
- 发明人: Holger Allardt , Andreas Raichle , Reiner Reetz , Johannes Büttner , Michael Zöllinger , Stefanie Haase , Rüdiger Fritz
- 申请人： Holger Allardt , Andreas Raichle , Reiner Reetz , Johannes Büttner , Michael Zöllinger , Stefanie Haase , Rüdiger Fritz
- 申请人地址： DE Ludwigshafen
- 专利权人： BASF SE
- 当前专利权人： BASF SE
- 当前专利权人地址： DE Ludwigshafen
- 代理机构： Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- 主分类号： C07C205/20
- IPC分类号： C07C205/20
摘要：
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.
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