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    PROCEDIMIENTO DE PREPARACION DE CICLOHEXANONA.
    201.
    发明专利
    PROCEDIMIENTO DE PREPARACION DE CICLOHEXANONA. 未知

    公开(公告)号：ES2353236T3

    公开(公告)日：2011-02-28

    申请号：ES05822993

    申请日：2005-11-30

    Applicant: RHODIA CHIMIE SA

    Inventor： LECONTE PHILIPPE ,  VERACINI SERGE ,  MOREL PHILIPPE

    IPC: C07C45/53 ,  C07C45/39 ,  C07C49/403 ,  C07D201/06

    Abstract: Un procedimiento de fabricación de ciclohexanona, caracterizado porque comprende las etapas siguientes: - Oxidar la ciclohexanona a hidroperóxido de ciclohexilo por medio de oxígeno en ausencia de catalizador - Purificar el medio de reacción mediante lavado con agua - Descomponer el hidroperóxido de ciclohexilo en ciclohexanol y ciclohexanona en presencia de un catalizador - Recuperar la mezcla ciclohexanol/ciclohexanona por separación del ciclohexano que no ha reaccionado y separación de los productos de punto de ebullición más elevado que los del ciclohexanol/ciclohexanona- Deshidrogenar el ciclohexanol contenido en la mezcla ciclohexanol/ciclohexanona en presencia de un catalizador de deshidrogenación- Destilar, en una primera etapa de destilación, la mezcla obtenida para obtener una fracción de cabeza (F1), que comprende los compuestos de punto de ebullición inferior a la temperatura de ebullición de la ciclohexanona, y una fracción de cola (Q1)- Destilar, en una segunda etapa de destilación, la fracción de cola (Q1) para obtener una fracción de cabeza (F2), constituida por la ciclohexanona, y una fracción de cola (Q2)

    202.
    发明专利
    未知

    公开(公告)号：AT488486T

    公开(公告)日：2010-12-15

    申请号：AT05822993

    申请日：2005-11-30

    Applicant: RHODIA CHIMIE SA

    Inventor： LECONTE PHILIPPE ,  VERACINI SERGE ,  MOREL PHILIPPE

    IPC: C07C45/53 ,  C07C45/39 ,  C07C49/403 ,  C07D201/06

    Abstract: The invention relates to a method for the preparation of cyclohexanone from cyclohexane. The invention relates more particularly to a method for the production of cyclohexane whose impurity content enables cyclohexanone to be used as a raw material for the production of e-caprolactam. The inventive method consists in treating the mixture of cyclohexanol/cyclohexanone arising from oxidation of cyclohexane by oxygen in a dehydrogenation stage in order to transform cyclohexanol into cyclohexanone and the impurities present such as cyclopentenal. The inventive method makes it possible to obtain highly pure cyclohexanone which is compatible when used as a raw material in the synthesis of e-caprolactam.

    Zpusob výroby vysoce cistého kaprolaktamu
    203.
    发明专利
    Zpusob výroby vysoce cistého kaprolaktamu 未知

    公开(公告)号：CZ299470B6

    公开(公告)日：2008-08-06

    申请号：CZ20001067

    申请日：2000-03-24

    Applicant: HYOSUNG CORP

    Inventor： LEE CHANG HWANG ,  LEE SI GEUN

    IPC: C07D201/06 ,  C07D223/10

    Abstract: Zpusob výroby vysoce cistého kaprolaktamu, který zahrnuje premenu cyklohexenu, získaného cástecnou hydrogenací benzenu na cyklohexanol, hydratací, premenu cyklohexanolu na cyklohexanon dehydrogenací,premenu cyklohexanonu na oxim cyklohexanonu oximací a premenu oximu cyklohexanonu na kaprolaktam Beckmannovým presmykem, spocívá v tom, že se pridá cást cyklohexanolu do separacního procesu cyklohexanolu a cyklohexanonu a další cást cyklohexanolu dodehydrogenacního procesu, pricemž množství cyklohexanolu pridaného do separacního procesu cyklohexanolu a cyklohexanonu je alespon tak velké jako množství cyklohexanolu pridaného do hydrogenacního procesu.

    204.
    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.

    206.
    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.

    207.
    发明专利
    未知

    公开(公告)号：PT1013643E

    公开(公告)日：2002-12-31

    申请号：PT99125632

    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.

    208.
    发明专利
    未知

    公开(公告)号：AT223892T

    公开(公告)日：2002-09-15

    申请号：AT99125632

    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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