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21. 发明授权

US4224249A Toluene diamine from non-washed dinitrotoluene 失效
标题翻译：来自未洗涤二硝基甲苯的甲苯二胺
公开(公告)号：US4224249A
公开(公告)日：1980-09-23
申请号：US38976
申请日：1979-05-14
申请人： Nance D. Kunz , Thomas A. Johnson , Barton Milligan
发明人： Nance D. Kunz , Thomas A. Johnson , Barton Milligan
IPC分类号： C07B61/00 , B01J29/00 , C07C67/00 , C07C209/00 , C07C209/36 , C07C211/51 , C07C85/11 , C07C85/26
CPC分类号： C07C209/36
摘要： This invention relates to an improvement in a process for preparing toluene diamine. The improvement resides in a process which is capable of permitting reduction of dinitrotoluene to toluene diamine without prior alkaline treatment for removal of nitrocresols in the dinitrotoluene. In carrying out the improvement the feed dinitrotoluene is water washed to remove HNO.sub.3 to a level below 6000 ppm, and the catalytic conversion of dinitrotoluene to toluene diamine is done continuously. Dinitrotoluene is charged to a reaction vessel containing a liquid carrier and reduced with hydrogen at constant pressure, the dinitrotoluene being added at a rate to maintain a concentration of dinitrotoluene of 0.0001 to 25% by weight of the total reactor contents while the hydrogenation catalyst is maintained at a level from about 0.1 to 3% based on the weight of reactor contents.
摘要翻译：本发明涉及一种制备甲苯二胺的方法的改进。改进之处在于能够允许将二硝基甲苯还原成甲苯二胺而不经过碱性处理除去二硝基甲苯中的硝基甲酚。在进行改进时，将进料二硝基甲苯进行水洗以除去HNO 3至低于6000ppm的水平，并连续进行二硝基甲苯向甲苯二胺的催化转化。将二硝基甲苯加入到含有液体载体的反应容器中并在恒定压力下用氢气还原，二硝基甲苯的加入速率使二硝基甲苯的浓度保持在总反应器内容物的0.0001至25重量％，同时保持氢化催化剂基于反应器内容物的重量为约0.1至3％的水平。

22. 发明授权

US3984488A Dinitration of nitrobenzotrifluoride 失效
标题翻译：二硝基三氟甲苯的硝化
公开(公告)号：US3984488A
公开(公告)日：1976-10-05
申请号：US580505
申请日：1975-05-23
申请人： Barton Milligan
发明人： Barton Milligan
IPC分类号： C07C67/00 , C07C201/00 , C07C205/11 , C07C205/12 , C07C205/58 , C07C79/12
CPC分类号： C07C201/12
摘要： This invention relates to an improvement in an process for dinitrating 3-nitrobenzotrifluoride and 4-hal0-3-nitrobenzotrifluoride compounds wherein the mononitrobenzotrifluoride composition is contacted with a mixture comprising sulfuric and nitric acid. The improvement constituting the basis of this invention comprises carrying out the dinitration with the sulfuric acid being present in at least a catalytic proportion but not exceeding about 65 mole percent in said mixture.
摘要翻译：本发明涉及三硝基三氟甲苯和4-卤代-3-硝基三氟甲苯化合物的二硝化方法的改进，其中一硝基三氟甲苯组合物与包含硫酸和硝酸的混合物接触。构成本发明基础的改进包括以所述混合物中至少催化比例但不超过约65摩尔％的硫酸进行二硝化。

23. 发明授权

US3957889A Selective nitration of aromatic and substituted aromatic compositions 失效
标题翻译：芳香和取代的芳香组合物的选择性硝化
公开(公告)号：US3957889A
公开(公告)日：1976-05-18
申请号：US574131
申请日：1975-05-02
申请人： Barton Milligan , Donald G. Miller
发明人： Barton Milligan , Donald G. Miller
IPC分类号： C07B61/00 , B01J21/00 , B01J27/00 , C07B43/02 , C07C67/00 , C07C201/00 , C07C201/08 , C07C205/06 , C07C205/11 , C07C205/12 , C07C79/10 , C07C79/12
CPC分类号： C07C201/08 , C07B43/02
摘要： This invention relates to an improvement in a process for nitrating an aromatic or substituted aromatic compound e.g., toluene or ortho-xylene, by reacting such aromatic or substituted aromatic in the presence of nitric acid. The improvement for enhancing the rate of nitration as well as the selectivity of nitration at the para-position in this process comprises carrying out the nitration reaction in the presence of at least an effective amount of anhydrous calcium sulfate or soluble anhydrite.

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