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    Method for production of hydroxylammonium phosphate in the synthesis of caprolactam
    4.
    发明公开
    Method for production of hydroxylammonium phosphate in the synthesis of caprolactam 无效
    Methode zur Herstellung von Hydroxylammoniumphosphat in der Synthese von Kaprolactam

    公开(公告)号：EP1013644A1

    公开(公告)日：2000-06-28

    申请号：EP99125633.0

    申请日：1999-12-22

    Applicant: PRAXAIR TECHNOLOGY, INC.

    Inventor： Echegaray, Diego Fernandez ,  Velloso, Antonio Augusto M. ,  Wagner, Matthew Lincoln

    IPC: C07D201/06 ,  C07D201/10

    CPC classification number: C07D201/06 ,  C07D201/10

    Abstract: A method for production of caprolactam. The method involves:

    (a) reacting air with ammonia gas in an ammonia conversion zone to produce nitric oxide;
    (b) oxidizing at least a portion of the nitric oxide to nitrogen dioxide to produce an NO x -rich process gas stream;
    (c) reactively absorbing the NO x -rich gas stream with phosphoric acid containing solution in an absorption zone to form nitrate ions;
    (d) contacting the nitrate ions with air in a degassing zone to produce a nitrate-rich aqueous process stream;
    (e) reducing the nitrate-rich aqueous stream with hydrogen in the presence of phosphoric acid to produce hydroxylammonium phosphate;
    (f) oximating the hydroxylammonium phosphate with cyclohexanone to produce cyclohexanone oxime; and
    (g) converting the cyclohexanone oxime to caprolactam.
    According to the invention, supplemental oxygen is added 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.

    Abstract translation: 一种生产己内酰胺的方法。 该方法包括：（a）在氨转化区中使空气与氨气反应产生一氧化氮; （b）将至少一部分一氧化氮氧化成二氧化氮以产生富含NO x的工艺气流; （c）在吸收区中用含磷酸溶液反应性吸收富含NO x的气流，形成硝酸根离子; （d）将硝酸根离子与脱气区的空气接触以产生富含硝酸盐的含水工艺物流; （e）在磷酸存在下用氢还原富硝酸盐的水流以产生磷酸羟铵; （f）用环己酮肟化磷酸羟铵，制得环己酮肟; 和（g）将环己酮肟转化为己内酰胺。 根据本发明，在氨转化区的下游添加补充氧以增加富含NOx的工艺气流中二氧化氮的形成量和速率。

    Procsess for producing laurolactam from cyclododecanone
    7.
    发明公开
    Procsess for producing laurolactam from cyclododecanone 有权
    Verfahren zur Herstellung von Laurolactam aus Zyklododecanon

    公开(公告)号：EP1329448A1

    公开(公告)日：2003-07-23

    申请号：EP03000846.0

    申请日：2003-01-15

    Applicant: Ube Industries, Ltd.

    Inventor： Kuroda, Nobuyuki, c/oUbe Chemical Factory ,  Kawai, Joji, c/oUbe Chemical Factory ,  Shimomura, Hideo, c/oUbe Chemical Factory

    IPC: C07D201/04 ,  C07D201/06

    CPC classification number: C07D201/06 ,  C07D201/04

    Abstract: Laurolactam having high quality is produced by reacting cyclododecanone with a hydroxylamine salt of a mineral acid, and converting the resultant cyclododecanoneoxime to laurolactam through the Beckmann rearrangement reaction, wherein a content of each of oxygen atom-containing C 12 organic compounds, for example, cyclododecenone or epoxycyclododecane, and cycloaliphatic unsaturated C 12 hydrocarbon compounds, contained, as an impurity, in the staring cyclododecanone material, is controlled to 1,000 ppm or less.

    Abstract translation: 通过使环十二烷酮与无机酸的羟胺盐反应，通过贝克曼重排反应将所得的环十二烷酮肟转化成十二内酰胺，生成高品质的月桂内酰胺，其中含有氧原子的C12有机化合物，例如环十二酮或 环氧环十二烷和环脂肪族不饱和C12烃化合物被控制在1000ppm以下，作为杂质，作为起始环十二烷酮材料。

    Method for production of hydroxylamine sulfate in the conventional process for the synthesis of caprolactam
    8.
    发明公开
    Method for production of hydroxylamine sulfate in the conventional process for the synthesis of caprolactam 有权
    在常规方法中生产硫酸胲的用于合成己内酰胺的方法

    公开(公告)号：EP1013643A1

    公开(公告)日：2000-06-28

    申请号：EP99125632.2

    申请日：1999-12-22

    Applicant: PRAXAIR TECHNOLOGY, INC.

    Inventor： Echegaray, Diego Fernandez ,  Velloso, Antonio Augusto M. ,  Wagner, Matthew Lincoln

    IPC: C07D201/06 ,  C07D201/10

    CPC classification number: C07D201/06 ,  C07D201/10

    Abstract: 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.

    Abstract translation: 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。

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