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    METHOD AND APPARATUS FOR PURIFYING NITRATION PRODUCTS
    5.
    发明申请
    METHOD AND APPARATUS FOR PURIFYING NITRATION PRODUCTS 有权
    用于净化硝化产品的方法和装置

    公开(公告)号：US20140221703A1

    公开(公告)日：2014-08-07

    申请号：US14118737

    申请日：2012-05-18

    申请人： Jürgen Pöhlmann ,  Heinrich Hermann ,  Mirko Handel ,  Jürgen Gebauer

    发明人： Jürgen Pöhlmann ,  Heinrich Hermann ,  Mirko Handel ,  Jürgen Gebauer

    IPC分类号： C07C201/16

    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。

    WASHING SYSTEM FOR NITROAROMATIC COMPOUNDS
    7.
    发明申请
    WASHING SYSTEM FOR NITROAROMATIC COMPOUNDS 有权
    硝基化合物洗涤系统

    公开(公告)号：US20120136181A1

    公开(公告)日：2012-05-31

    申请号：US13388836

    申请日：2009-08-18

    申请人： Sergio Berretia

    发明人： Sergio Berretia

    IPC分类号： C07C201/16 ,  B01J19/00

    CPC分类号： C07C201/16 ,  C02F1/04 ,  C02F1/20 ,  C02F2101/38 ,  C02F2209/06 ,  C07C205/06

    摘要： A method of removing alkalinity and salt from a nitroaromatic product downstream of water washing to remove mineral acids and alkaline washing to remove salts of organic acids, comprises washing the product stream with an acidic aqueous solution, prior to the step of removing excess organic reactant, by steam stripping or distillation. Acid removed from the stripper or column is recycled back for use in the acidic washing. The acidic washing is done instead of the neutral washing step of the prior art. It removes residual salt and decreases the level of entrained colloidal water in the nitroaromatic product.

    摘要翻译： 一种从水洗下游的硝基芳族化合物产物中去除碱度和盐的方法，以除去无机酸和碱洗涤以除去有机酸的盐，包括在除去过量有机反应物的步骤之前用酸性水溶液洗涤产物流， 通过汽提或蒸馏。 从汽提塔或塔中除去的酸被循环使用，用于酸洗。 进行酸性洗涤代替现有技术的中性洗涤步骤。 它去除残留的盐并降低硝基芳族产物中夹带的胶体水的含量。

    Process for preparation of a nitrophenol
    8.
    发明申请
    Process for preparation of a nitrophenol 审中-公开
    硝基苯酚的制备方法

    公开(公告)号：US20050256343A1

    公开(公告)日：2005-11-17

    申请号：US10520725

    申请日：2003-07-09

    申请人： Eric Fache ,  Sebastien Righini

    发明人： Eric Fache ,  Sebastien Righini

    IPC分类号： C07C201/12 ,  C07C21/12 ,  C07C201/16 ,  C07C205/22

    CPC分类号： C07C201/16 ,  C07C205/22

    摘要： The invention relates to a method of preparing a high-purity nitrophenol and, more specifically, p-nitrophenol from a nitrohalobenzene. The inventive method comprises the following steps: (a) hydrolysis of a nitrohalobenzene compound by reacting said compound with a base; (b) acidification in order to produce the nitrophenol compound from the salt thereof by means of an acid treatment; (c) crystallisation of the nitrophenol compound obtained; and (d) separation of the product obtained. The invention is characterised in that it also comprises at least the following steps: (e) concentration of the reaction medium after hydrolysis (a) and before acidification (b); and (f) liquid/liquid decantation after acidification (b) and before crystallisation (c), which is intended to eliminate the water phase obtained after acidification (b).

    摘要翻译： 本发明涉及一种从硝基卤苯制备高纯度硝基苯酚，更具体地说是对硝基苯酚的方法。 本发明的方法包括以下步骤：（a）通过使所述化合物与碱反应来水解硝基卤苯化合物; （b）酸化以通过酸处理从其盐生产硝基苯酚化合物; （c）获得的硝基苯酚化合物的结晶; 和（d）所得产物的分离。 本发明的特征在于其还包括至少以下步骤：（e）水解（a）和酸化（b）之前浓缩反应介质; 和（f）在酸化（b）和结晶（c）之前的液体/液体倾析，其旨在消除酸化后获得的水相（b）。

    Purification process
    10.
    发明授权
    Purification process 失效
    净化过程

    公开(公告)号：US5910604A

    公开(公告)日：1999-06-08

    申请号：US816930

    申请日：1997-03-13

    申请人： Stephen Martin Brown ,  Brian David Gott ,  Thomas Gray ,  Seyed Mehdi Tavana

    发明人： Stephen Martin Brown ,  Brian David Gott ,  Thomas Gray ,  Seyed Mehdi Tavana

    IPC分类号： C07C201/16 ,  C07C205/59 ,  C07C303/36 ,  C07C303/44 ,  C07C311/51

    CPC分类号： C07C303/44 ,  C07C201/16

    摘要： A process for the purification of a compound of general formula I: ##STR1## wherein R.sup.1 is hydrogen or C.sub.1 -C.sub.6 alkyl, C.sub.2 -C.sub.6 alkenyl or C.sub.2 -C.sub.6 alkynyl, any of which may optionally be substituted with one or more substituents selected from halogen and hydroxy; or COOR.sup.4, COR.sup.6, CONR.sup.4 R.sup.5 or CONHSO.sub.2 R.sup.4 ;R.sup.4 and R.sup.5 independently represent hydrogen or C.sub.1 -C.sub.4 alkyl optionally substituted with one or more halogen atoms;R.sup.6 is a halogen atom or a group R.sup.4 ;R.sup.2 is hydrogen or halo; andR.sup.3 is C.sub.1 -C.sub.4 alkyl, C.sub.2 -C.sub.4 alkenyl or C.sub.2 -C.sub.4 alkynyl, any of which may optionally be substituted with one or more halogen atoms; or halo; or, where appropriate, a salt thereof;from a mixture containing the compound of general formula I together with one or more isomers or di-nitrated analogs thereof; the process comprising dissolving the mixture in a suitable crystallization solvent and recrystallizing the product from the resulting crystallization solution wherein the crystallization solution contains not more than 25% loading of the compound of general formula I, loading being defined as: ##EQU1## and wherein the temperature to which the solution is cooled for crystallization is not greater than about 30.degree. C.; wherein, after the addition of the crystallizing solvent but before recrystallization, the crystallization solution is subjected to at least one wash with an aqueous solution having an acid pH. The process is particularly useful for purifying acifluorfen produced via a route starting with m-cresol.

    摘要翻译： 一种用于纯化通式I化合物的方法：其中R 1是氢或C 1 -C 6烷基，C 2 -C 6烯基或C 2 -C 6炔基，其中任何一个可任选被一个或多个选自卤素和羟基的取代基取代 ; 或COOR4，COR6，CONR4R5或CONHSO2R4; R4和R5独立地表示氢或任选被一个或多个卤素原子取代的C 1 -C 4烷基; R6是卤素原子或基团R4; R2是氢或卤素; 并且R 3是C 1 -C 4烷基，C 2 -C 4烯基或C 2 -C 4炔基，其中任何一个可任选地被一个或多个卤素原子取代; 或卤素; 或者在适当情况下为其盐; 由含有通式I化合物的混合物与一种或多种异构体或其二硝化类似物一起混合; 该方法包括将混合物溶解在合适的结晶溶剂中并从所得结晶溶液中重结晶产物，其中结晶溶液含有不超过25％的通式I化合物的负载，负载定义为：并且其中温度为 该溶液冷却结晶不超过约30℃。 其中，在加入结晶溶剂之后但重结晶之前，用酸性pH值的水溶液对结晶溶液进行至少一次洗涤。 该方法特别可用于纯化通过以间甲酚开始的途径产生的三氟果霜。