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    Preparation of p-nitrophenolic compounds
    75.
    发明授权
    Preparation of p-nitrophenolic compounds 失效
    对硝基酚类化合物的制备

    公开(公告)号：US5414148A

    公开(公告)日：1995-05-09

    申请号：US249200

    申请日：1994-05-26

    Applicant: Pascal Metivier ,  Laurent Bernard

    Inventor： Pascal Metivier ,  Laurent Bernard

    IPC: C07C201/06 ,  C07C201/10 ,  C07C205/22 ,  C07C207/04 ,  C07C205/20 ,  C07C205/21 ,  C07C205/26

    CPC classification number: C07C201/00 ,  C07C201/08

    Abstract: p-Nitrophenolic compounds, e.g., p-nitrophenol itself, are selectively prepared by (a) reacting a phenolic compound with a nitrosating agent in the presence of sulfuric acid, the concentration of which H.sub.2 SO.sub.4 being at least 60%, (b) oxidizing the p-nitrosophenolic compound thus formed with nitric acid, the concentration of sulfuric acid in the medium of reaction, upon completion of oxidation, being no greater than 80%, and (c) separating the p-nitrophenolic compound which thus precipitates.

    Abstract translation: 通过（a）在硫酸存在下使酚类化合物与亚硝化剂反应，其中H 2 SO 4的浓度为至少60％，（b）将硝基酚类化合物氧化为 由硝酸形成的对亚硝基苯酚化合物，氧化后的反应介质中的硫酸浓度不大于80％，（c）分离因此析出的对硝基酚化合物。

    Method of separating 2-nitrosophenol isomer from admixture with 4-nitrosophenol isomer
    76.
    发明授权
    Method of separating 2-nitrosophenol isomer from admixture with 4-nitrosophenol isomer 失效
    将2-亚硝基苯酚异构体与4-亚硝基苯酚异构体混合分离的方法

    公开(公告)号：US5019659A

    公开(公告)日：1991-05-28

    申请号：US569115

    申请日：1990-08-17

    Applicant: James A. Manner ,  Charles H. Hoelscher

    Inventor： James A. Manner ,  Charles H. Hoelscher

    IPC: C07C201/00

    CPC classification number: C07C201/00

    Abstract: Disclosed is a method for selectively separating 2-nitrosophenol from an isomeric mixture containing 2-nitrosophenol and 4-nitrosophenol by contacting the mixture with an organic solvent so as to preferentially dissolve the 2-nitrosophenol from the mixture.

    Abstract translation: 公开了通过使混合物与有机溶剂接触以从混合物中优先溶解2-亚硝基苯酚，从含有2-亚硝基苯酚和4-亚硝基苯酚的异构体混合物中选择性分离2-亚硝基苯酚的方法。

    Preparation of C-nitrosodiarylamines from diarylamines
    77.
    发明授权
    Preparation of C-nitrosodiarylamines from diarylamines 失效
    由二芳基胺制备C-亚硝基二芳基胺

    公开(公告)号：US4362893A

    公开(公告)日：1982-12-07

    申请号：US270037

    申请日：1981-06-03

    Applicant: Paul R. Kurek

    Inventor： Paul R. Kurek

    IPC: C07C85/145 ,  C07C85/18 ,  C07C85/20

    CPC classification number: C07C201/00

    Abstract: C-Nitrosodiarylamines may be prepared in a single stage from diarylamines by adding alcoholic solutions of a hydrogen halide below the surface of a stirred mixture of the diphenylamine in an organic liquid containing water. The amount of water contained is critical, and amounts from about 1 to about 3 g per mole of diarylamine are preferred.

    Abstract translation: C亚硝基二芳基胺可以通过在二苯胺在含水的有机液体的搅拌的混合物的表面下面加入卤化氢的醇溶液，从二芳基胺在单一阶段中制备。 所含的水的量是关键的，优选约1至约3克/摩尔二芳基胺的量。

    Process for the preparation of 4-nitro-m-cresol
    78.
    发明授权
    Process for the preparation of 4-nitro-m-cresol 失效
    4-硝基间甲酚的制备方法

    公开(公告)号：US3917719A

    公开(公告)日：1975-11-04

    申请号：US36829573

    申请日：1973-06-08

    Applicant: KERR MC GEE CHEM CORP

    Inventor： BALDWIN ROGER ALLEN ,  HAWTHORNE MARION FREDERICK ,  CHENG MING TZU

    IPC: C07C205/22 ,  C07C207/04 ,  C07C79/26

    CPC classification number: C07C201/06 ,  C07C201/00 ,  C07C205/22 ,  C07C207/04

    Abstract: The invention provides a process for the preparation of 4-nitrom-cresol which includes nitrosating m-cresol by simultaneously introducing separate streams of m-cresol and a nitrosating agent into a quantity of cold aqueous acid to form 4-nitroso-m-cresol and thereafter introducing both sodium nitrate and nitric acid to effect the oxidation of the nitroso compound to form 4-nitro-mcresol.

    Abstract translation: 本发明提供了一种制备4-硝基间甲酚的方法，该方法包括通过同时将间甲苯和亚硝基化剂流引入一定量的含水酸中，使间甲酚亚硝化形成4-亚硝基间甲酚， 甲酚，然后引入硝酸钠和硝酸，以使亚硝基化合物氧化形成4-硝基间甲酚。

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