发明名称 |
Prevention of precipitation from nitrated aromatic crude products |
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. |
申请公布号 |
US8637712(B2) |
申请公布日期 |
2014.01.28 |
申请号 |
US201213362607 |
申请日期 |
2012.01.31 |
申请人 |
ALLARDT HOLGER;RAICHLE ANDREAS;REETZ REINER;BUETTNER JOHANNES;ZOELLINGER MICHAEL;HAASE STEFANIE;FRITZ RUEDIGER;BASF SE |
发明人 |
ALLARDT HOLGER;RAICHLE ANDREAS;REETZ REINER;BUETTNER JOHANNES;ZOELLINGER MICHAEL;HAASE STEFANIE;FRITZ RUEDIGER |
分类号 |
C07C205/20 |
主分类号 |
C07C205/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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