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    Process for preparing epsilon-caprolactam
    71.
    发明授权
    Process for preparing epsilon-caprolactam 失效
    制备EPSILON-CAPROLACTAM的方法

    公开(公告)号：US3712887A

    公开(公告)日：1973-01-23

    申请号：US3712887D

    申请日：1970-10-02

    Applicant: RHONE POULENC SA

    Inventor： COLLEUILLE Y ,  GARDON R

    IPC: C07D201/10 ,  C07D201/02 ,  C07D41/06

    CPC classification number: C07D201/02

    Abstract: E-CAPROLACTAM IS PREPARED FROM A CYCLOHEXANE OXIDATION PRODUCT CONTAINING CYCLOHEXYL HYDROPEROXIDE AND OXIDATION BY-PRODUCTS INCLUDING 6-HYDROPEROXY-HEXANOIC ACID, WHICH HAS BEEN OBTAINED BY LIQUID PHASE OXIDATION OF CYCLOHEXANE, WITHOUT A METAL CATALYST, USING A MOLECULAR OXYGEN CONTAINING GAS, BY WASHING THE OXIDATION PRODUCT WITH WATER, SEPARATING THE RESULTING AQUEOUS PHASE CONTAINING 6-HYDROPEROXYHEXANOIC ACID AND HEATING THE ACID UNDER PRESSURE WITH AMMONIA AND HYDROGEN IN THE PRESENCE OF A HYDROGENATION CATALYST.

    ε-카프로락탐의 제조 방법
    75.
    发明公开
    ε-카프로락탐의 제조 방법 有权
    用于生产具有环己酮氧化物转化率高的ε-CAPROLACTAM的方法和来自含有含CYPOHEXANONE含氧原子气体的ε-CAPROLACTAM的高选择性

    公开(公告)号：KR1020050006039A

    公开(公告)日：2005-01-15

    申请号：KR1020040051544

    申请日：2004-07-02

    Applicant: 스미또모 가가꾸 가부시끼가이샤

    Inventor： 요꼬따마사시 ,  고바야시요시노리 ,  기따무라마사루

    IPC: C07D201/10

    CPC classification number: C07D201/04 ,  Y02P20/52

    Abstract: PURPOSE: A method for producing ε-caprolactam is provided, thereby producing ε-caprolactam with high conversion rate of cyclohexanone oxime and high selectivity to ε-caprolactam from cyclohexanone oxime-containing crude gas. CONSTITUTION: The method for producing ε-caprolactam comprises fluidizing a catalyst layer in order to contact the solid catalyst particles with oxime-containing gas, and introducing cyclohexanone oxime-containing gas to a solid catalyst particle layer through a plurality of holes having the average hole diameter of 3 mm or less in a gas dispersing plate, wherein the solid catalyst particle is a zeolite particle; 90 wt.% or more of the solid catalyst particles have the diameter of 5 to 100 micrometer; and the distance between holes is 0.5 to 25 cm.

    Abstract translation: 目的：提供ε-己内酰胺的制造方法，由此生成环己酮肟的高转化率的ε-己内酰胺，并且由含环己酮肟的粗气体对ε-己内酰胺的选择性高。 构成：ε-己内酰胺的制造方法包括使催化剂层流化，以使含有肟的气体与固体催化剂颗粒接触，并将含有环己酮肟的气体通过具有平均孔的多个孔引入固体催化剂颗粒层 气体分散板中的直径为3mm以下，其中，固体催化剂粒子为沸石粒子; 90重量％以上的固体催化剂粒子的直径为5〜100微米; 孔间距离为0.5〜25cm。

    METHOD FOR PRODUCING EPSILON-CAPROLACTAM
    77.
    发明专利
    METHOD FOR PRODUCING EPSILON-CAPROLACTAM 未知

    公开(公告)号：SG110097A1

    公开(公告)日：2005-04-28

    申请号：SG200403750

    申请日：2004-06-29

    Applicant: SUMITOMO CHEMICAL CO

    Inventor： MASASHI YOKOTA ,  YOSHINORI KOBAYASHI ,  MASARU KITAMURA

    IPC: C07D201/10 ,  C07D201/04

    Abstract: epsilon -Caprolactam is produced by the method comprising the step of introducing a gas comprising cyclohexanone oxime into a layer of solid catalyst particles through a plurality of holes of a gas diffusion plate so that the solid catalyst particles are brought into contact with the gas, while fluidizing the catalyst layer, characterized in that the holes have an average diameter of about 3 mm or smaller. In accordance with the production method, epsilon -caprolactam can be produced from a raw material gas comprising cyclohexanone oxime with a high conversion of cyclohexanone oxime and a high selectivity to epsilon -caprolactam.

    79.
    发明专利
    未知

    公开(公告)号：DE69907122T2

    公开(公告)日：2004-02-26

    申请号：DE69907122

    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

    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 NOx-rich process gas stream; (c) reactively absorbing the NOx-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 NOx-rich process gas stream.

    80.
    发明专利
    未知

    公开(公告)号：DE69902864T2

    公开(公告)日：2003-05-08

    申请号：DE69902864

    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

    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 NOx-rich process gas stream; (c) reacting the NOx-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 NOx-rich process gas stream.

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