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    PROCESS FOR THE CONTINUOUS PREPARATION OF NITROBENZENE
    81.
    发明申请
    PROCESS FOR THE CONTINUOUS PREPARATION OF NITROBENZENE 有权
    连续制备硝基苯的方法

    公开(公告)号：US20110196177A1

    公开(公告)日：2011-08-11

    申请号：US13019350

    申请日：2011-02-02

    Applicant: Jürgen MÜNNIG ,  Bernd PENNEMANN ,  Andreas Karl RAUSCH

    Inventor： Jürgen MÜNNIG ,  Bernd PENNEMANN ,  Andreas Karl RAUSCH

    IPC: C07C201/08

    CPC classification number: C07C201/08 ,  C07C205/06

    Abstract: Nitrobenzene is continuously produced by nitration of benzene with mixed acid under adiabatic conditions. In this process, the pressure upstream of the nitration reactor is from 14 bar to 40 bar above the pressure in the gas phase of the phase separation apparatus used to separate crude nitrobenzene and waste acid.

    Abstract translation: 通过在绝热条件下用混合酸硝化苯来连续生产硝基苯。 在该过程中，硝化反应器上游的压力比用于分离粗硝基苯和废酸的相分离装置的气相压力高14巴至40巴。

    Process for working up secondary components in the preparation of dinitrotoluene
    82.
    发明授权
    Process for working up secondary components in the preparation of dinitrotoluene 有权
    在制备二硝基甲苯时处理次要组分的方法

    公开(公告)号：US06953869B2

    公开(公告)日：2005-10-11

    申请号：US10878079

    申请日：2004-06-28

    Applicant: Jürgen Münnig ,  Dietmar Wastian ,  Wolfgang Lorenz ,  Berthold Keggenhoff

    Inventor： Jürgen Münnig ,  Dietmar Wastian ,  Wolfgang Lorenz ,  Berthold Keggenhoff

    IPC: C07C201/08 ,  C02F1/26 ,  C02F1/66 ,  C02F9/00 ,  C07C201/16 ,  C07C205/06 ,  C07C205/00

    CPC classification number: C02F1/26 ,  C02F1/66 ,  C02F9/00 ,  C02F2103/36 ,  C07C201/16 ,  C07C205/06

    Abstract: The present invention relates to a process for working up organic secondary components which are formed in the one-stage or two-stage nitration of toluene to dinitrotoluene. These organic secondary components are present in the acidic and alkaline waste water from the dinitrotoluene washing step and in the aqueous distillate from the sulfuric acid concentration step, together with small amounts of mononitrotoluene and dinitrotoluene. This process comprises a) combining the acidic and alkaline waste waters from the washing step and the aqueous distillate from the sulfuric acid concentration step such that the resulting mixture has a pH below 5, b) separating the aqueous and organic phases which form by phase separation, and c) recycling the organic phase from step b) into the nitration process.

    Abstract translation: 本发明涉及一种处理甲苯一硝基甲苯硝化成二硝基甲苯形成有机二次成分的方法。 这些有机次要组分存在于来自二硝基甲苯洗涤步骤的酸性和碱性废水中以及来自硫酸浓缩步骤的含水馏出物中，以及少量的一硝基甲苯和二硝基甲苯。 该方法包括：a）从硫酸浓缩步骤中将洗涤步骤的酸性和碱性废水与含水馏出物混合，使得所得混合物的pH值低于5，b）分离通过相分离形成的水相和有机相 ，和c）将来自步骤b）的有机相再循环到硝化过程中。

    Aromatic nitration reactions
    83.
    发明授权
    Aromatic nitration reactions 失效
    芳香硝化反应

    公开(公告)号：US06906231B2

    公开(公告)日：2005-06-14

    申请号：US10398692

    申请日：2001-10-05

    Applicant: Martyn John Earle ,  Suhas Prabhakar Katdare

    Inventor： Martyn John Earle ,  Suhas Prabhakar Katdare

    IPC: C07B43/02 ,  C07B61/00 ,  C07C201/08 ,  C07C205/06 ,  C07C205/12 ,  C07C205/37

    CPC classification number: C07C201/08 ,  C07C205/06 ,  C07C205/12 ,  C07C205/37

    Abstract: A process for the nitration of an aromatic compound, wherein the aromatic compound is admixed with a nitrating agent in the presence of an ionic liquid is described. The method for the nitration of aromatic compounds in (e.g. neutral) ionic liquids has advantages over conventional nitrations, such as the only by-product being water, the ionic liquid not being consumed and the nitrating agent being relatively inexpensive.

    Abstract translation: 描述了在离子液体存在下将芳族化合物与硝化剂混合的芳族化合物的硝化方法。 在（例如中性）离子液体中硝化芳族化合物的方法具有优于常规硝化的优点，例如仅有副产物是水，离子液体不被消耗，硝化剂相对便宜。

    Preparation of picric acid
    85.
    发明授权
    Preparation of picric acid 失效
    苦味酸的制备

    公开(公告)号：US6063967A

    公开(公告)日：2000-05-16

    申请号：US94595

    申请日：1998-06-15

    Applicant: Laurent Bernard ,  Pascal Metivier

    Inventor： Laurent Bernard ,  Pascal Metivier

    IPC: C07C201/08 ,  C06B25/04 ,  C07C205/24 ,  C07C205/00

    CPC classification number: C07C201/16 ,  C07C201/08

    Abstract: Picric acid, namely, 2,4,6-trinitrophenol, is readily and effectively prepared by nitrating o-nitrophenol and/or p-nitrophenol into at least one dinitrophenol in a nitric acid medium of reaction, characteristically essentially consisting of nitric acid or immixture thereof with a strong co-acid, the at least one dinitrophenol remaining soluble in the medium of reaction, and therein completing nitration of the at least one dinitrophenol and precipitating picric acid therefrom.

    Abstract translation: 苦味酸，即2,4,6-三硝基苯酚，通过在硝酸反应介质中将邻硝基苯酚和/或对硝基苯酚硝化成至少一种二硝基酚而容易且有效地制备，其特征在于主要由硝酸或杂质组成 其中所述至少一种二硝基苯酚仍然可溶于所述反应介质中，并且其中完成所述至少一种二硝基苯酚的硝化并从其沉淀出苦味酸。

    Process for the nitration of diphenylethers
    86.
    发明授权
    Process for the nitration of diphenylethers 失效
    硝基二苯醚的工艺

    公开(公告)号：US6028219A

    公开(公告)日：2000-02-22

    申请号：US901545

    申请日：1997-07-28

    Applicant: John Heathcote Atherton ,  Stephen Martin Brown ,  James Peter Muxworthy ,  Martin Lennon

    Inventor： John Heathcote Atherton ,  Stephen Martin Brown ,  James Peter Muxworthy ,  Martin Lennon

    IPC: C07B43/02 ,  C07C201/08 ,  C07C205/38 ,  C07C205/59 ,  C07C205/60 ,  C07C303/40 ,  C07C311/51 ,  C07C205/06

    CPC classification number: C07C201/08 ,  C07C303/40

    Abstract: A process for the preparation 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 OH; 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 are each independently 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;R.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;the process comprising reacting a compound of general formula II: ##STR2## wherein R.sup.1, R.sup.2 and R.sup.3 are as defined for general formula I; with a nitrating agent comprising nitric acid or a mixture of nitric and sulphuric acids in the presence of an organic solvent and in the presence of acetic anhydride, characterized in that the molar ratio of acetic anhydride to compound of general formula II is from about 1:1 to 3:1.

    Abstract translation: 一种制备通式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，其中任何一个可以被一个或多个选自卤素和 哦; 或COOR4，COR6，CONR4R5或CONHSO2R4; R 4和R 5各自独立地为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; R 3是C 1 -C 4烷基，C 2 -C 4烯基或C 2 -C 4炔基，其中任何一个可以任选被一个或多个卤素原子取代; 或卤素; 所述方法包括使通式II的化合物：其中R 1，R 2和R 3如通式I所定义; 与硝酸和硝酸和硫酸的混合物在有机溶剂的存在下和在乙酸酐存在下的硝化剂，其特征在于乙酸酐与通式II的化合物的摩尔比为约1： 1到3：1。

    Process for the preparation of 5-fluoro-2-nitrobenzoic acid
    89.
    发明授权
    Process for the preparation of 5-fluoro-2-nitrobenzoic acid 失效
    5-氟-2-硝基苯甲酸的制备方法

    公开(公告)号：US5756831A

    公开(公告)日：1998-05-26

    申请号：US667833

    申请日：1996-06-20

    Applicant: Wolfram Kissener ,  Jurgen Kuprat ,  Herbert Emde ,  Klaus-Christian Paetz

    Inventor： Wolfram Kissener ,  Jurgen Kuprat ,  Herbert Emde ,  Klaus-Christian Paetz

    IPC: C07C201/08 ,  C07C201/16 ,  C07C205/58

    CPC classification number: C07C201/08

    Abstract: 5-Fluoro-2-nitrobenzoic acid having low contents of 3-fluoro-2-nitro-benzoic acid is prepared in a simple manner by nitrating 3-fluorobenzoic acid in an anhydrous medium using an anhydrous nitrating acid and isolating and purifying 5-fluoro-2nitro-benzoic acid, by taking 7.5 to 15 parts by weight of water, based on 1 part by weight of 3-fluorobenzoic acid used, introducing the reaction mixture reacted to exhaustion into this volume of water taken, filtering off the precipitate formed and washing it with water.

    Abstract translation: 通过使用无水硝酸将氮氟酸在无水介质中硝化3-氟苯甲酸，分离纯化5-氟-2-硝基苯甲酸，得到3-氟-2-硝基 - 苯甲酸含量低的5-氟-2-硝基苯甲酸 -2-硝基 - 苯甲酸，通过使用7.5重量份水，以1重量份所用的3-氟苯甲酸为原料，将反应混合物反应至该体积的水中，滤出形成的沉淀物， 用水冲洗。

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