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    Process for the long-term operation of a continuously operated heterogeneously catalyzed partial dehydrogenation of a hydrocarbon to be dehydrogenated
    2.
    发明专利
    Process for the long-term operation of a continuously operated heterogeneously catalyzed partial dehydrogenation of a hydrocarbon to be dehydrogenated 未知

    公开(公告)号：ZA200901384B

    公开(公告)日：2010-05-26

    申请号：ZA200901384

    申请日：2009-02-26

    Applicant: BASF SE

    Inventor： DIETERLE MARTIN ,  SCHINDLER GOETZ-PETER ,  MUELLER-ENGEL KLAUS JOACHIM ,  ADAMI CHRISTOPH ,  SCHEIDEL JENS ,  HORSTMANN CATHARINA

    IPC: B01J20100101 ,  C07C20100101

    Abstract: Preparation of dehydrogenated hydrocarbon, comprises providing a gaseous reaction mixture stream containing the hydrocarbon at an increased temperature through a catalyst bed system present in a reaction zone; and optionally supplying a volume flow of molecular oxygen, molecular hydrogen, water vapor and/or another inert gas that act as auxiliary gases for the dehydrogenation reaction, to the gaseous reaction mixture stream between its entry at the start of the catalyst bed system and its exit from the end of the catalyst bed system. Procedure for the long-term operation of a continuously-operated and heterogeneously-catalyzed partial dehydrogenation process of a hydrocarbon to be dehydrogenated to form a dehydrogenated hydrocarbon, comprises providing a gaseous reaction mixture stream containing the hydrocarbon in an initial molar volume (KW), at an increased temperature through a catalyst bed system, which is present in a reaction zone (RZ) and consist of many catalyst bed sections that are arranged serially along the flow direction of the gaseous reaction mixture stream, and as a whole consists a molar volume (M) of a dehydrogenation catalyst; where: at the time of operation t is t 0, the passage of the gaseous reaction mixture stream through first, second and last third portion of (M) along the flow direction output, proportions of A, B and C mol.% of (KW) of the hydrocarbon to be dehydrogenated are respectively converted to form dehydrogenated hydrocarbon, under the condition that A is greater than B and B is greater than C and during the passage of the gaseous reaction mixture stream through the catalyst bed system, a total (G) i.e. A+B+C mol.% of (KW) of the hydrocarbon to be dehydrogenated that is contained in this reaction mixture stream is dehydrogenated to form dehydrogenated hydrocarbon, and optionally supplying a volume flow of molecular oxygen, molecular hydrogen, water vapor and/or another inert gas that act as auxiliary gases for the dehydrogenation reaction, to the gaseous reaction mixture stream between its entry at the start of the catalyst bed system and its exit from the end of the catalyst bed system, where deactivation of the catalyst bed system that advances with increasing operating time within an operation time interval of greater than t 0 and less than t r is counteracted by varying the temperature profile of the gaseous reaction mixture stream within the catalyst bed system and/or the volume flow of the optionally supplied auxiliary gases for the dehydrogenation reaction, where t r is the operating time point at which the dehydrogenation is interrupted and the catalyst bed system is at first recovered after the operating time point of t 0, thus the variation is carried out in such a manner that with increasing operating time point, the proportion A decreases, the proportion B undergoes a maximum and the proportion C increases.

    3.
    发明专利
    未知

    公开(公告)号：DE502004007442D1

    公开(公告)日：2008-08-07

    申请号：DE502004007442

    申请日：2004-04-07

    Applicant: BASF SE

    Inventor： MACHHAMMER OTTO ,  CRONE SVEN ,  BORGMEIER FRIEDER ,  MUELLER-ENGEL KLAUS JOACHIM ,  ADAMI CHRISTOPH ,  DIEFENBACHER ARMIN

    IPC: C07C57/05 ,  C07C51/215

    Abstract: Disclosed is a method for the heterogeneously catalyzed partial direct oxidation of propane and/or isobutane. According to said method, target product is separated from the product gas mixture obtained in the reaction stage in a reprocessing stage, the remaining product gas mixture is divided into two partial quantities having the same composition, one partial quantity is redirected into the reaction stage while the other partial quantity is discharged, and both the reaction stage and the reprocessing stage are operated at an increased pressure.

    4.
    发明专利
    未知

    公开(公告)号：AT399150T

    公开(公告)日：2008-07-15

    申请号：AT04726111

    申请日：2004-04-07

    Applicant: BASF SE

    Inventor： MACHHAMMER OTTO ,  CRONE SVEN ,  BORGMEIER FRIEDER ,  MUELLER-ENGEL KLAUS ,  ADAMI CHRISTOPH ,  DIEFENBACHER ARMIN

    IPC: C07C57/05 ,  C07C51/215

    Abstract: Disclosed is a method for the heterogeneously catalyzed partial direct oxidation of propane and/or isobutane. According to said method, target product is separated from the product gas mixture obtained in the reaction stage in a reprocessing stage, the remaining product gas mixture is divided into two partial quantities having the same composition, one partial quantity is redirected into the reaction stage while the other partial quantity is discharged, and both the reaction stage and the reprocessing stage are operated at an increased pressure.

    PROCEDIMIENTO PARA LA OXIDACION DIRECTA PARCIAL, CON CATALISIS HETEROGENEA, DE PROPANO Y/O DE ISO-BUTANO PARA DAR ACIDO ACRILICO Y/O ACIDO METACRILICO.
    6.
    发明专利
    PROCEDIMIENTO PARA LA OXIDACION DIRECTA PARCIAL, CON CATALISIS HETEROGENEA, DE PROPANO Y/O DE ISO-BUTANO PARA DAR ACIDO ACRILICO Y/O ACIDO METACRILICO. 未知

    公开(公告)号：ES2307005T3

    公开(公告)日：2008-11-16

    申请号：ES04726111

    申请日：2004-04-07

    Applicant: BASF SE

    Inventor： MACHHAMMER OTTO ,  CRONE SVEN ,  BORGMEIER FRIEDER ,  MULLER-ENGEL KLAUS JOACHIM ,  ADAMI CHRISTOPH ,  DIEFENBACHER ARMIN

    IPC: C07C57/05 ,  C07C51/215

    Abstract: Procedimiento para la oxidación directa parcial, con catálisis heterogénea, de propano y/o de iso-butano para dar, al menos, uno de los productos finales constituidos por el ácido acrílico, el ácido metacrílico, según el cual se alimenta a una etapa de reacción, que está conectada por el lado de los gases, a parte de estarlo con una entrada para la mezcla de partida gaseosa para la reacción, en caso dado con otras entradas para gases auxiliares, y con una salida para la mezcla gaseosa del producto, una mezcla de partida de la reacción que contiene propano y/o iso-butano, oxígeno molecular y, al menos, otro gas de dilución, con una presión de entrada P 1 , se efectúa una oxidación en la etapa de reacción mediante la conducción de la mezcla de partida gaseosa para la reacción, a temperatura elevada, por encima de un catalizador, que se encuentra en estado de agregación sólido, el propano y/o el iso-butano contenidos en la mezcla de partida gaseosa para la reacción directamente de manera parcial para dar, al menos, un producto final, y la mezcla gaseosa para la reacción se retira de la etapa de reacción en forma de una mezcla gaseosa del producto que contiene, al menos, un producto final, con la presión de salida P 2 y se conduce hasta una etapa de elaboración con esta presión P 2 , que está conectada por el lado de los gases, dejando a parte una entrada para la mezcla gaseosa del producto, en caso dado con otras entradas para gases auxiliares, y con una salida para la mezcla gaseosa de producto residual, se separa básicamente en la etapa de elaboración a partir de la mezcla gaseosa del producto de la etapa de reacción el producto final contenido en la misma en una fase líquida y se retira de la etapa de elaboración la mezcla gaseosa de producto residual remanente en la anterior, que no solamente contiene propano y/o iso-butano sino, en caso dado, propeno y/o iso-buteno, con la presión de salida P 3 , cumpliéndose que P 3 _ 1,5 bares y la mezcla gaseosa del producto residual se divide en dos cantidades parciales de igual composición y una de cuyas cantidades parciales se purga como descarga y la otra cantidad parcial se recicla como gas de circulación y se envía de nuevo hasta la etapa de reacción como componente de la mezcla de partida gaseosa para la reacción comprimida hasta la presión de entrada P 1 .

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