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    11.
    发明专利
    未知

    公开(公告)号：AT520640T

    公开(公告)日：2011-09-15

    申请号：AT05743080

    申请日：2005-04-21

    Applicant: BASF SE

    Inventor： DIETERLE MARTIN ,  MUELLER-ENGEL KLAUS ,  HECHLER CLAUS ,  HAMMON ULRICH ,  DIEFENBACHER ARMIN

    IPC: C07C57/05 ,  C07C51/25

    Abstract: The invention relates to a method for producing acrylic acid by means of two-stage heterogeneously catalyzed partial gas phase oxidation of propylene. According to said method, previously dehydrogenated propane is used as a propylene source while the first partial oxidation stage is operated so as to limit propylene reaction. Furthermore, unreacted propane and propylene contained in the product gas mixture of the second partial oxidation stage are largely redirected into the propane dehydrogenation process taking place upstream.

    12.
    发明专利
    未知

    公开(公告)号：BRPI0806767A2

    公开(公告)日：2011-09-13

    申请号：BRPI0806767

    申请日：2008-01-24

    Applicant: BASF SE

    Inventor： DIEFENBACHER ARMIN ,  HAMMON ULRICH ,  SCHLIEPHAKE VOLKER ,  SIEDER GEORG

    IPC: C07C57/07 ,  C07C51/215 ,  C07C51/25 ,  C07C51/44 ,  C07C51/48

    Abstract: A process for preparing acrylic acid, in which an acrylic acid-comprising product gas mixture obtained by catalytic gas phase partial oxidation of a C3 precursor of acrylic acid is fractionally condensed in a condensation column provided with internals ascending into itself with side draw removal of crude acrylic acid and with liquid phase draw removal of acrylic acid-comprising acid water, and acrylic acid present in acid water is taken up into an extractant and then removed from the extractant and recycled into the condensation column, or taken up in aqueous metal hydroxide, or sent to further purification of the crude acrylic acid.

    Manufacture of acrylic acid involves subjecting precursor to heterogeneously catalyzed gas phase partial oxidation with oxygen in catalyst, reducing gas mixture, and subjecting crude acrylic acid to thermal separation process
    14.
    发明专利
    Manufacture of acrylic acid involves subjecting precursor to heterogeneously catalyzed gas phase partial oxidation with oxygen in catalyst, reducing gas mixture, and subjecting crude acrylic acid to thermal separation process 未知

    公开(公告)号：DE102007055086A1

    公开(公告)日：2009-05-20

    申请号：DE102007055086

    申请日：2007-11-16

    Applicant: BASF SE

    Inventor： DIEFENBACHER ARMIN ,  HAMMON ULRICH ,  SCHLIEPHAKE VOLKER ,  SIEDER GEORG

    IPC: C07C57/05 ,  C07C57/07

    Abstract: A 3C or more of precursor is subjected to heterogeneously catalyzed gas phase partial oxidation with molecular oxygen in solid-state catalyst to obtain product gas mixture. The product gas mixture is reduced by direct cooling, passed into a condensation column, and crude acrylic acid is conducted, and acid water is disposed. A residual gas mixture is recycled, and crude acrylic acid is subjected to thermal separation process. The acrylic acid is taken in organic solvent to form organic extract, and thermal separation processed to form acrylic acid. A 3C or more of precursor is subjected to heterogeneously catalyzed gas phase partial oxidation with molecular oxygen in solid-state catalyst at elevated temperature to obtain product gas mixture comprising acrylic acid, steam and secondary components. The product gas mixture is reduced by direct/indirect cooling, passed into a condensation column equipped with separating internals, allowed to ascend into the condensation column, and fractionally condensed. The crude acrylic acid comprising water and secondary components, is conducted as the target product from the condensation column through a side draw (A1) disposed above the feed point of the product gas mixture into the condensation column, and acid water comprising acrylic acid and secondary components is disposed above the side draw (A1) through a liquid phase draw (A2). A residual gas mixture comprising secondary components having lower boiling points than water at the top of the condensation column and a bottoms liquid comprising acrylic acid and conversion products, and secondary components having higher boiling points than acrylic acid from the bottom space of the condensation column, is recycled after cooling with reflux liquid, into the condensation column, and the crude acrylic acid is subjected to thermal separation process and purified. The acrylic acid in a portion of acid water not recycled into the condensation column is taken up from the acid water into an organic solvent by extraction with the organic solvent to form an organic extract comprising acrylic acid. The acrylic acid is removed from the organic extract using thermal separation process, and the acrylic acid removed from the extract is recycled into the condensation column into the aqueous solution of a metal hydroxide. Thus, acrylic acid is manufactured.

    PROCEDIMIENTO PARA LA OXIDACION DIRECTA PARCIAL, CON CATALISIS HETEROGENEA, DE PROPANO Y/O DE ISO-BUTANO PARA DAR ACIDO ACRILICO Y/O ACIDO METACRILICO.
    15.
    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 .

    17.
    发明专利
    未知

    公开(公告)号：DE602006012549D1

    公开(公告)日：2010-04-08

    申请号：DE602006012549

    申请日：2006-12-13

    Applicant: BASF SE ,  DOW CHEMICAL CO

    Inventor： DIEFENBACHER ARMIN ,  GOEBBEL HANS-GEORG ,  BITTERLICH STEFAN ,  VOSS HARTWIG ,  SCHULTZ HENNING ,  FORLIN ANNA ,  PATRASCU RENATE

    IPC: B01D1/26 ,  B01D3/14

    Abstract: The present invention relates to a process for separating at least one propylene glycol from a mixture (M) comprising water and said propylene glycol, said process comprising (I) evaporating the mixture in at least two evaporation and/or distillation stages at decreasing operating pressures of the evaporators and/or distillation columns obtaining mixture (M′) and mixture (M″); (II) separating the mixture (M′) obtained in (I) in at least one further distillation step, obtaining a mixture (M-I) comprising at least 70 wt.-% of water and a mixture (M-II) comprising less than 30 wt.-% of water.

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