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    Integrated process for preparing a carboxylic acid from an alkane
    3.
    发明授权
    Integrated process for preparing a carboxylic acid from an alkane 有权
    从烷烃制备羧酸的综合方法

    公开(公告)号：US08080686B2

    公开(公告)日：2011-12-20

    申请号：US12316322

    申请日：2008-12-11

    申请人： Abraham Benderly ,  Nitin Chadda ,  Douglass Sevon

    发明人： Abraham Benderly ,  Nitin Chadda ,  Douglass Sevon

    IPC分类号： C07C51/16 ,  C07C57/02

    CPC分类号： C07C253/26 ,  C07C51/252 ,  Y02P20/125 ,  Y02P20/582 ,  C07C57/04 ,  C07C255/08

    摘要： The present invention relates to an integrated process for producing unsaturated carboxylic acids from the corresponding C2-C4 alkane. The process begins with performance of thermally integrated dehydrogenation reactions which convert a C2-C4 alkane to its corresponding C2-C4 alkene, and which involve exothermically converting a portion of an alkane to its corresponding alkene by oxidative dehydrogenation in an exothermic reaction zone, in the presence of oxygen and a suitable catalyst, and then feeding the products of the exothermic reaction zone to an endothermic reaction zone wherein at least a portion of the remaining unconverted alkane is endothermically dehydrogenated to form an additional quantity of the same corresponding alkene, in the presence of carbon dioxide and an other suitable catalyst. The alkene products of the thermally integrated dehydrogenation reactions are then provided to a catalytic vapor phase partial oxidation process for conversion of the alkene to the corresponding unsaturated carboxylic acid or nitrile. Unreacted alkene and carbon dioxide are recovered from the oxidation product stream and recycled back to the thermally integrated dehydrogenation reactions.

    摘要翻译： 本发明涉及从相应的C 2 -C 4烷烃制备不饱和羧酸的综合方法。 该方法开始于将C 2 -C 4烷烃转化为相应的C 2 -C 4烯烃的热合成脱氢反应的性能，并且其包括通过放热反应区中的氧化脱氢将烷烃的一部分放热转化成其相应的烯烃， 存在氧气和合适的催化剂，然后将放热反应区的产物进料到吸热反应区，其中至少一部分未转化的烷烃在吸热脱氢中形成额外量的相应的烯烃，在存在下 的二氧化碳和其它合适的催化剂。 然后将热合成脱氢反应的烯烃产物提供到用于将烯烃转化成相应的不饱和羧酸或腈的催化气相部分氧化方法。 从氧化产物流中回收未反应的烯烃和二氧化碳，并循环回热合成脱氢反应。

    Integrated process for preparing a carboxylic acid from an alkane
    6.
    发明申请
    Integrated process for preparing a carboxylic acid from an alkane 有权
    从烷烃制备羧酸的综合方法

    公开(公告)号：US20090171109A1

    公开(公告)日：2009-07-02

    申请号：US12316322

    申请日：2008-12-11

    申请人： Abraham Benderly ,  Nitin Chadda ,  Douglass Sevon

    发明人： Abraham Benderly ,  Nitin Chadda ,  Douglass Sevon

    IPC分类号： C07C255/00 ,  C07C61/00

    CPC分类号： C07C253/26 ,  C07C51/252 ,  Y02P20/125 ,  Y02P20/582 ,  C07C57/04 ,  C07C255/08

    摘要： The present invention relates to an integrated process for producing unsaturated carboxylic acids from the corresponding C2-C4 alkane. The process begins with performance of thermally integrated dehydrogenation reactions which convert a C2-C4 alkane to its corresponding C2-C4 alkene, and which involve exothermically converting a portion of an alkane to its corresponding alkene by oxidative dehydrogenation in an exothermic reaction zone, in the presence of oxygen and a suitable catalyst, and then feeding the products of the exothermic reaction zone to an endothermic reaction zone wherein at least a portion of the remaining unconverted alkane is endothermically dehydrogenated to form an additional quantity of the same corresponding alkene, in the presence of carbon dioxide and an other suitable catalyst. The alkene products of the thermally integrated dehydrogenation reactions are then provided to a catalytic vapor phase partial oxidation process for conversion of the alkene to the corresponding unsaturated carboxylic acid or nitrile. Unreacted alkene and carbon dioxide are recovered from the oxidation product stream and recycled back to the thermally integrated dehydrogenation reactions.

    摘要翻译： 本发明涉及从相应的C 2 -C 4烷烃制备不饱和羧酸的综合方法。 该方法开始于将C 2 -C 4烷烃转化为相应的C 2 -C 4烯烃的热合成脱氢反应的性能，并且其包括通过放热反应区中的氧化脱氢将烷烃的一部分放热转化成其相应的烯烃， 存在氧气和合适的催化剂，然后将放热反应区的产物进料到吸热反应区，其中至少一部分未转化的烷烃被吸热脱氢以形成额外量的相应的烯烃，在存在下 的二氧化碳和其它合适的催化剂。 然后将热合成脱氢反应的烯烃产物提供到用于将烯烃转化成相应的不饱和羧酸或腈的催化气相部分氧化方法。 从氧化产物流中回收未反应的烯烃和二氧化碳，并循环回热合成脱氢反应。