Process and reaction vessel for production of alkyl nitrite
    291.
    发明授权
    Process and reaction vessel for production of alkyl nitrite 失效
    用于生产亚硝酸烷基酯的方法和反应容器

    公开(公告)号:US4908466A

    公开(公告)日:1990-03-13

    申请号:US102367

    申请日:1987-09-29

    Inventor: James R. Nelson

    CPC classification number: B01D3/009 C07C201/04 Y02P20/127

    Abstract: A process and reaction vessel for producing alkyl nitrite is disclosed the process comprising (a) contacting nitric oxide, lower alcohol and oxygen in a reaction zone such that alkyl nitrite is formed, said reaction zone comprising a reactor section and a rectification section, (b) supplying a liquid scrubbing agent to an upper portion of the rectification section, (c) withdrawing a gaseous alkyl nitrite product stream from the upper portion of the rectification section, and (d) withdrawing a liquid stream from a lower portion of the reactor section. The reactor section provides intimate vapor-liquid contact sufficient to enhance the conversion of nitric oxide to alkyl nitrite and the rectification section provides sufficient vapor residence time to enhance conversion of oxygen, as well as sufficient rectification capabilities to reduce the amounts of water and nitric acid in the gaseous alkyl nitrite product stream.

    Process for the preparation of 5-nitro-1,4-naphthoquinone
    293.
    发明授权
    Process for the preparation of 5-nitro-1,4-naphthoquinone 失效
    5-硝基-1,4-萘醌的制备方法

    公开(公告)号:US4880571A

    公开(公告)日:1989-11-14

    申请号:US921918

    申请日:1986-10-22

    CPC classification number: C07C201/12 C07C201/14

    Abstract: A process for the preparation of 5-nitro-1,4-naphthoquinones of formula ##STR1## wherein R is hydrogen, a C.sub.1 -C.sub.4 alkyl radical or a C.sub.1 -C.sub.4 alkoxy radical, by oxidation of 1-nitronaphthalene or a suitably substituted 1-nitronaphthalene, which process comprises carrying out the reaction with manganese(III) sulfate as oxidizing agent or a mixture of manganese(III) sulfate and cerium sulfate.The maganese(III) sulfate consumed can be regenerated electrolytically with good current yield. The process is environmentally safe, as the oxidizing agent and the solvent, if any, can be reused.

    Abstract translation: 制备式“IMAGE”的5-硝基-1,4-萘醌的方法,其中R是氢,C1-C4烷基或C1-C4烷氧基,通过1-硝基萘的氧化或适当取代的1-硝基萘 该方法包括用硫酸锰(III)作为氧化剂或硫酸锰(III)和硫酸铈的混合物进行反应。 消耗的硫酸锰(III)可以以较好的电流产率电解再生。 该方法是环境安全的,因为氧化剂和溶剂(如果有的话)可以重复使用。

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