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    • 83. 发明公开
    • Method for production of hydroxylamine sulfate in the conventional process for the synthesis of caprolactam
    • 在常规方法中生产硫酸胲的用于合成己内酰胺的方法
    • EP1013643A1
    • 2000-06-28
    • EP99125632.2
    • 1999-12-22
    • PRAXAIR TECHNOLOGY, INC.
    • Echegaray, Diego FernandezVelloso, Antonio Augusto M.Wagner, Matthew Lincoln
    • C07D201/06C07D201/10
    • C07D201/06C07D201/10
    • An improvement in the conventional process for the production of caprolactam. The process involves:

      (a) reacting air with ammonia gas in an ammonia conversion zone to produce nitric oxide;
      (b) oxidizing a portion of the nitric oxide to nitrogen dioxide to produce an NO x -rich process gas stream;
      (c) reacting the NO x -rich stream with ammonium carbonate in a nitriting zone to produce ammonium nitrite;
      (d) reducing the ammonium nitrite to hydroxylamine diammonium sulfate;
      (e) hydrolyzing the hydroxylamine diammonium sulfate to hydroxylamine sulfate;
      (f) oximating the hydroxylamine sulfate with cyclohexanone to produce cyclohexanone oxime; and
      (g) converting the cyclohexanone oxime to caprolactam.
      The process is improved by adding supplemental oxygen downstream of the ammonia conversion zone to increase the quantity and rate of formation of nitrogen dioxide in the NO x -rich process gas stream.
    • 在传统工艺的改进生产己内酰胺的。 该过程包括:(a)在氨转化区反应用氨气空气以产生一氧化氮; (B)氧化所述一氧化氮的一部分以二氧化氮以生产富含NOx的反应气流; (C)反应与碳酸铵在亚硝化区中,以产生亚硝酸铵的富含NOx的物流; (D)降低了亚硝酸盐对羟胺二硫酸铵; (E)水解所述羟胺硫酸二铵到硫酸羟胺; (F)的肟化的硫酸胲用环己酮,以产生环己酮肟; 及(g)将所述环己酮肟为己内酰胺。 该过程通过加入氨转化区,以增加富含NOx反应气流中形成的二氧化氮的量和速率的下游补充氧气改善。