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    Process for obtaining .alpha.,.alpha.'-dinitro anthraquinones of high purity
    2.
    发明授权
    Process for obtaining .alpha.,.alpha.'-dinitro anthraquinones of high purity 失效
    获得高纯度α，α'-二硝基蒽醌的方法

    公开(公告)号：US4307022A

    公开(公告)日：1981-12-22

    申请号：US52884

    申请日：1979-06-28

    申请人： Maurice R. J. Vallette

    发明人： Maurice R. J. Vallette

    IPC分类号： C07C205/47 ,  C07C67/00 ,  C07C201/00 ,  C07C201/16 ,  C07C76/00

    CPC分类号： C07C201/16 ,  C07C205/47

    摘要： The invention relates to a process for obtaining .alpha.,.alpha.'-dinitro-anthraquinones of high purity from crude mixtures obtained from the dinitration of anthraquinone. Such a mixture is placed in contact with an ester having a boiling point greater than 120.degree. C. derived from a mono- or di-carboxylic acid or phosphoric acid, at a temperature between 20.degree. and 200.degree. C. or more, then, after possible cooling, the insoluble material consisting essentially of the .alpha.,.alpha.'-dinitro-anthraquinones is separated.

    摘要翻译： 本发明涉及从由蒽醌的二硝化得到的粗混合物中获得高纯度的α，α'-二硝基蒽醌的方法。 将这样的混合物在20℃至200℃或更高的温度下与来自单羧酸或二羧酸或磷酸的沸点大于120℃的酯接触， 在可能的冷却之后，分离基本上由α，α'-二硝基蒽醌组成的不溶性物质。

    Process for preparing pure 1-nitroanthraquinone
    5.
    发明授权
    Process for preparing pure 1-nitroanthraquinone 失效
    纯1-硝基蒽醌的制备方法

    公开(公告)号：US4031116A

    公开(公告)日：1977-06-21

    申请号：US707130

    申请日：1976-07-20

    申请人： Karl-Werner Thiem ,  Wolfgang Auge ,  Rutger Neeff

    发明人： Karl-Werner Thiem ,  Wolfgang Auge ,  Rutger Neeff

    IPC分类号： C07C76/00

    摘要： Pure 1-nitroanthraquinone substantially free of dinitroanthraquinone is prepared by:1. Nitrating anthraquinone or a mixture which contains anthraquinone with at least 90% nitric acid at a temperature of at least 0.degree. C wherein the mole ratio of nitric acid to anthraquinone is less than 20 to 1;2. Stopping the reaction when the anthraquinone conversion is at least 50% by cooling the reaction mixture to a temperature of at most 20.degree. C and/or by adjusting the mole fraction of nitric acid in the reaction mixture to a value of at most 0.86;3. Precipitating 1-nitroanthraquinone by adjusting the mole fraction of nitric acid to a value of from 0.7 to 0.4 and/or by reducing the temperature to at most 20.degree. C; and4. Separating the precipitated 1-nitroanthraquinone and subjecting it to vacuum distillation.

    摘要翻译： 基本上不含二硝基蒽醌的纯1-硝基蒽醌通过以下方法制备：

    Process for the preparation of nitrosobenzene
    7.
    发明授权
    Process for the preparation of nitrosobenzene 失效
    亚硝基苯的制备方法

    公开(公告)号：US4314089A

    公开(公告)日：1982-02-02

    申请号：US129959

    申请日：1980-03-13

    申请人： Hans Zengel ,  Manfred Bergfeld ,  Werner Klostermeier

    发明人： Hans Zengel ,  Manfred Bergfeld ,  Werner Klostermeier

    IPC分类号： C07C207/00 ,  C07B61/00 ,  C07C20060101 ,  C07C67/00 ,  C07C201/00 ,  C07C207/02 ,  C07C76/00 ,  C07C81/02

    CPC分类号： C07C201/00

    摘要： An improved process for the preparation of nitrosobenzene by catalytically reducing nitrobenzene with the use of a reducing agent selected from the group consisting of aliphatic compounds containing from about 1 to about 20 carbon atoms, cycloaliphatic compounds containing from about 4 to about 12 carbon atoms, benzene, naphthalene, and ethylenically unsaturated compounds containing from about 2 to about 10 carbon atoms is disclosed. The improvement comprises performing the reduction in the presence of from about 0.05 to about 4.0 moles of water per mole of nitrobenzene.

    摘要翻译： 通过使用选自含有约1至约20个碳原子的脂族化合物，含有约4至约12个碳原子的脂族化合物，苯，苯， ，萘和含有约2至约10个碳原子的烯属不饱和化合物。 改进之处在于每摩尔硝基苯减少存在约0.05至约4.0摩尔的水。

    Process for obtaining 1,5-dinitro-anthraquinone of high purity
    8.
    发明授权
    Process for obtaining 1,5-dinitro-anthraquinone of high purity 失效
    获得高纯度的1,5-二硝基蒽醌的方法

    公开(公告)号：US4307021A

    公开(公告)日：1981-12-22

    申请号：US52883

    申请日：1979-06-28

    申请人： Maurice R. J. Vallette

    发明人： Maurice R. J. Vallette

    IPC分类号： C07C205/47 ,  C07C67/00 ,  C07C201/00 ,  C07C76/00

    CPC分类号： C07C201/16 ,  C07C2103/24

    摘要： The invention relates to a process for obtaining 1,5-dinitro-anthraquinone of high purity from crude mixtures of dinitro-anthraquinones. Said mixture is treated at a temperature ranging from 150.degree. C. to 200.degree. C. with an ester having a boiling point greater than 150.degree. C. derived from an aliphatic alcohol containing 1 to 4 carbon atoms and a mono- or di-carboxylic acid or phosphoric acid, and then, after possible cooling without the temperature falling below 150.degree. C., separating the insoluble material consisting essentially of 1,5-dinitro-anthraquinone.

    摘要翻译： 本发明涉及从二硝基蒽醌的粗混合物中获得高纯度的1,5-二硝基蒽醌的方法。 所述混合物在150℃至200℃的温度下用沸点大于150℃的酯衍生自含有1至4个碳原子的脂族醇和单 - 或二 - 羧酸 酸或磷酸，然后在可能的冷却下，温度低于150℃，分离基本上由1,5-二硝基蒽醌组成的不溶物。

    Process for the preparation of nitrosobenzene
    9.
    发明授权
    Process for the preparation of nitrosobenzene 失效
    亚硝基苯的制备方法

    公开(公告)号：US4178315A

    公开(公告)日：1979-12-11

    申请号：US889810

    申请日：1978-03-24

    申请人： Hans Zengel ,  Manfred Bergfeld

    发明人： Hans Zengel ,  Manfred Bergfeld

    IPC分类号： B01J23/14 ,  B01J23/34 ,  C07C67/00 ,  C07C201/00 ,  C07C207/02 ,  C07C76/00

    CPC分类号： B01J23/34

    摘要： An improved process for the preparation of nitrosobenzene by the catalytic reduction of nitrosobenzene is disclosed. The improvement in the process comprises utilizing as a reducing agent a compound selected from the group consisting of aliphatic compounds containing from about one to about twenty carbon atoms, benzene, naphthalene and ethylenically unsaturated compounds containing from about two to about 10 carbon atoms.

    摘要翻译： 公开了一种通过亚硝基苯催化还原制备亚硝基苯的改进方法。 该方法的改进包括使用选自含有约1至约20个碳原子的脂族化合物，含有约2至约10个碳原子的苯，萘和烯属不饱和化合物的化合物作为还原剂。

    Separation of 1,5-dinitroanthraquinone and 1,8-dinitroanthraquinone
    10.
    发明授权
    Separation of 1,5-dinitroanthraquinone and 1,8-dinitroanthraquinone 失效
    1,5-二硝基四氢呋喃和1,8-四氮杂环戊烷的分离

    公开(公告)号：US4053488A

    公开(公告)日：1977-10-11

    申请号：US723915

    申请日：1976-09-16

    申请人： Hilmar Bruenemann ,  Heinz Eilingsfeld ,  Dietrich Lach

    发明人： Hilmar Bruenemann ,  Heinz Eilingsfeld ,  Dietrich Lach

    IPC分类号： C07C205/47 ,  C07C20060101 ,  C07C67/00 ,  C07C201/00 ,  C09B1/00 ,  C07C76/00

    CPC分类号： C07C225/34

    摘要： A process for separating 1,5-dinitroanthraquinone and 1,8-dinitroanthraquinone by heating a dinitroanthraquinone mixture, in a mixture of from 5 to 85 per cent by weight of N-methylpyrrolidone and from 95 to 15 per cent by weight of an organic liquid which boils at from 80.degree. to 210.degree. C and is miscible in all proportions with N-methylpyrrolidone, at from 60.degree. to 180.degree. C, and separating off the undissolved material, at the extraction temperature, after the solution equilibrium has been reached. The insoluble material contains more than 85 per cent by weight, and as a rule more than 90 per cent by weight, of 1,5-dinitroanthraquinone. From the extract, it is possible to isolate the dissolved 1,8-dinitroanthraquinone together with the dissolved 1,5-dinitroanthraquinone and any byproducts which may be present.