Azeotropic nitration of benzene
    373.
    发明授权
    Azeotropic nitration of benzene 失效
    苯的共沸硝化

    公开(公告)号:US3928475A

    公开(公告)日:1975-12-23

    申请号:US49704774

    申请日:1974-08-09

    Applicant: DU PONT

    Inventor: DASSEL MARK W

    CPC classification number: C07C201/08 C07C205/06

    Abstract: A process for the mononitration of benzene wherein the nitration is carried out at temperatures of at least 120*C. in mixed HNO3H2SO4 and excess water is carried overhead as an azeotrope with part of the benzene and is then decanted from the benzene. The heat of nitration can be used to vaporize the azeotrope. The nitrated benzene product is removed as bottoms and decanted from the acid phase. This avoids the necessity of reconcentratingn the H2SO4.

    Abstract translation: 苯的单硝化方法,其中硝化在混合的HNO3-H2SO4中在至少120℃的温度下进行,过量的水作为与部分苯的共沸物塔顶馏出,然后从苯中倾出。 硝化的热量可用于蒸发共沸物。 将硝化苯产物作为塔底物除去并从酸相中倾析。 这避免了重新浓缩H2SO4的必要性。

    Production of secondary alkyl primary amines
    374.
    发明授权
    Production of secondary alkyl primary amines 失效
    仲烷基伯胺的生产

    公开(公告)号:US3917705A

    公开(公告)日:1975-11-04

    申请号:US42855373

    申请日:1973-12-26

    Applicant: TEXACO INC

    CPC classification number: B01J27/22

    Abstract: A process for selectively converting n-paraffins to secondary alkyl primary amines where byproduct formation is substantially reduced which comprises contacting the n-paraffin in a plurality of reaction zones with a nitrating agent, removing gaseous reaction products and water from the liquid products of each of the reaction zones and introducing nitrating agent along with liquid product from the preceding zone into each succeeding reaction zone, thereby effecting an overall conversion to nitroparaffin not exceeding 25 weight percent of the n-paraffin, and thereafter hydrogenating the nitroparaffin to the amine.

    Abstract translation: 选择性地将正链烷烃转化为仲烷基伯胺的方法,其中副产物形成基本上减少,其包括使多个反应区中的正链烷烃与硝化剂接触,从每个反应产物和液体产物中除去气态反应产物和水 反应区,并将硝化剂与前一区域的液体产物一起引入每个后续反应区,从而总体转化为不超过正己烷的25重量%的硝基石蜡,然后将硝基石蜡氢化为胺。

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