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公开(公告)号：US10125088B2
公开(公告)日：2018-11-13
申请号：US15645055
申请日：2017-07-10
IPC分类号： C07C201/16 , B01J19/24 , B01D11/04 , B01D19/00
摘要： The present invention relates to a method for purifying raw dinitrotoluenes resulting from dinitration of toluene in the presence of a nitric acid/sulfuric acid/nitrating acid mixture, and a device or plant for performing the method, and a corresponding production plant for producing dinitrotoluene, characterized in that (a) the raw dinitrotoluenes are first subjected to a wash with at least one washing medium after separation of the nitrating acid mixture, followed by a separation of the washing medium; and that (b) subsequently the washed dinitrotoluenes resulting from method step (a) are subjected to stripping (stripping gas treatment) with at least one gas (stripping gas).
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公开(公告)号：US09540313B2
公开(公告)日：2017-01-10
申请号：US14632086
申请日：2015-02-26
IPC分类号： C07C201/16 , B01J19/24
CPC分类号： C07C201/16 , B01J19/24 , B01J2219/24 , C07C205/06
摘要： The present invention relates to a method for removing impurities from nitrated crude products obtained during the nitration of nitratable aromatic compounds, after removal of the final nitrating acid, by treatment with a washing medium, and also to a plant or apparatus suitable for implementing this method. Further provided by the invention is a production plant for the nitration of nitratable aromatic compounds with subsequent purification of the nitrated products.
摘要翻译： 本发明涉及一种从硝化硝化硝酸中除去硝化酸后，通过用洗涤介质处理而得到的硝化粗产物中除去杂质的方法，以及适用于实施该方法的设备或装置 。 本发明进一步提供了一种用于硝化硝化的芳族化合物的生产设备，随后硝化产物的纯化。
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公开(公告)号：US10941087B2
公开(公告)日：2021-03-09
申请号：US16483483
申请日：2017-12-14
IPC分类号： C07B43/02 , B01D11/04 , B01J19/00 , B01J19/24 , C07C205/06
摘要： The invention relates to a method for preferably adiabatic nitration of nitratable aromatic organic compounds (aromatics) and to a corresponding plant, in particular a production plant (nitration plant) for carrying out said method.
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公开(公告)号：US09738592B2
公开(公告)日：2017-08-22
申请号：US15323800
申请日：2015-04-30
IPC分类号： C07C201/16 , B01D11/04 , B01D19/00 , B01J19/24 , C07C205/06
CPC分类号： C07C201/16 , B01D11/0488 , B01D19/0005 , B01J19/24 , B01J2219/24 , Y02P20/582 , C07C205/06
摘要： The present invention relates to a method for purifying raw dinitrotoluenes resulting from dinitration of toluene in the presence of a nitric acid/sulfuric acid/nitrating acid mixture, and a device or plant for performing the method, and a corresponding production plant for producing dinitrotoluene, characterized in that (a) the raw dinitrotoluenes are first subjected to a wash with at least one washing medium after separation of the nitrating acid mixture, followed by a separation of the washing medium; and that (b) subsequently the washed dinitrotoluenes resulting from method step (a) are subjected to stripping (stripping gas treatment) with at least one gas (stripping gas).
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