发明名称 |
PROCESS FOR THE SEPARATION BY DISTILLATION OF DINITROTOLUENE FROM PROCESS WASTEWATER FROM THE PREPARATION OF DINITROTOLUENE BY NITRATION OF TOLUENE BY MEANS OF NITRATING ACID |
摘要 |
A process is proposed for distillatively removing dinitrotoluene from process wastewater from the preparation of dinitrotoluene by nitrating toluene with nitrating acid, which comprises basifying the process wastewater to a pH of >8.5, feeding it to a stripping column in the upper region thereof and stripping it with steam in countercurrent to obtain a vapor stream laden with dinitrotoluene and a bottom stream depleted in dinitrotoluene compared to the process wastewater used.
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申请公布号 |
PT1993990(E) |
申请公布日期 |
2011.09.12 |
申请号 |
PT20070726640T |
申请日期 |
2007.03.06 |
申请人 |
BASF SE |
发明人 |
ULRICH PENZEL;RUEDIGER FRITZ;HOLGER ALLARDT;JOHANNES ADAM;ANNE-KATHRIN MERTEN |
分类号 |
C07C201/16;B01D3/14;C07C205/06 |
主分类号 |
C07C201/16 |
代理机构 |
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地址 |
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