PROCESO INTEGRADO PARA PREPARAR TRIOXANO DE FORMALDEHIDO.

    公开(公告)号:MX2008015697A

    公开(公告)日:2008-12-19

    申请号:MX2008015697

    申请日:2007-06-11

    Applicant: BASF SE

    Abstract: Método integrado para la preparación de trioxano a partir de formaldehído, que comprende los pasos: a) introducción de un flujo A1 de alimentación que contiene formaldehído y agua y un flujo B3 de retorno que consiste esencialmente de formaldehído y trioxano hacia una unidad de concentración de formaldehído, en donde los flujos se separan en un flujo A2 rico en formaldehído y un flujo A3 que consiste esencialmente de agua; b) introducción de un flujo C1 de producto, que contiene trioxano, agua, y formaldehído, un flujo E1 de retorno que contiene trioxano, agua y formaldehído, y posiblemente flujo A2 hacia una primera columna de destilación de baja presión, en donde los flujos se destilan a una presión de 0.1 a 1.5 atmósferas, con un flujo B1 enriquecido en trioxano que contiene predominantemente trioxano, y también agua y formaldehído, influjo B2 de remoción de fango que consiste esencialmente de formaldehído y agua, y el flujo B2 de retorno que contiene predominantemente agua, y también formaldehído y trioxano removido como un flujo de remoción lateral; c) introducción de un flujo B2 de remoción de fango y posiblemente el flujo A2 hacia un reactor de síntesis de trioxano, en donde los flujos se dejan reaccionar, y en donde el flujo C1 que contiene trioxano, agua y formaldehído se obtiene; d) introducción de un flujo B1 hacia una columna de destilación de presión media, en donde el flujo se destila a una presión de 1.0 a 3.0 atmósferas, en donde una corriente D1 de ebullidor bajo que contiene metanol, metilal, y formato de metilo, y una corriente D2 que contiene predominantemente trioxano y también formaldehído y agua se obtienen, e) introducción de una corriente D2 hacia una columna de destilación de alta presión, en donde la corriente se destila a una presión de 2.5 a 10.0 atmósferas, en donde el flujo E1 de retorno contiene trioxano, agua y formaldehído, y un flujo E2 de producto que consiste esencialmente de trioxano se obtiene; en donde el flujo A2 se puede introducir ya sea hacia la columna de destilación de baja presión o hacia el reactor de síntesis de trioxano 35, o hacia ambos.

    13.
    发明专利
    未知

    公开(公告)号:AT414072T

    公开(公告)日:2008-11-15

    申请号:AT04804133

    申请日:2004-12-21

    Applicant: BASF SE

    Abstract: A process for removing trioxane from a use stream I of formaldehyde, trioxane and water, by a) providing a use stream I of formaldehyde as the main component and trioxane and water as the secondary components, b) mixing the use stream I with a recycle stream VII to obtain a feed stream Ia, c) distilling the use stream Ia in a first distillation stage to obtain a stream II of formaldehyde as the main component and water as the secondary component, and a stream III of trioxane as the main component and water and formaldehyde as the secondary components, d) distilling the stream III in a second distillation stage having a pressure higher than in the first distillation stage, to obtain a stream IV of trioxane and a stream V of trioxane as the main component and water and formaldehyde as the secondary components, e) distilling the stream V in a third distillation stage to obtain a stream VI of water and the recycle stream VII of trioxane as the main component and water and formaldehyde as the secondary components.

    15.
    发明专利
    未知

    公开(公告)号:NO20080529L

    公开(公告)日:2008-02-29

    申请号:NO20080529

    申请日:2008-01-29

    Applicant: BASF SE

    Abstract: The invention relates to an integrated process for preparing trioxane from formaldehyde, comprising the steps of: a) a stream A 1 comprising water and formaldehyde and a recycle stream B 2 consisting substantially of water and formaldehyde are fed to a trioxane synthesis reactor and allowed to react to obtain a product stream A 2 comprising trioxane, water and formaldehyde; b) stream A 2 is fed to a first low-pressure distillation column and distilled at a pressure of from 0.1 to 2.5 bar to obtain a stream B 1 enriched in trioxane and additionally comprising water and formaldehyde, and the recycle stream B 2 consisting substantially of formaldehyde and water; c) stream B 1 and a recycle stream D 1 comprising trioxane, water and formaldehyde are fed to a second low-pressure distillation column and distilled at a pressure of from 0.1 to 2.5 bar to obtain a stream C 1 comprising predominantly trioxane and additionally formaldehyde and water, and a stream C 2 consisting substantially of formaldehyde and water; d) stream C 1 is fed to a high-pressure distillation column and distilled at a pressure of from 0.2 to 17.5 bar to obtain the recycle stream D 1 and a product stream D 2 consisting substantially of trioxane, in which a removal of the low boilers present in streams B 1 or C 1 may be undertaken between steps b) and c) or c) and d).

    Integrated method for producing trioxane from formaldehyde

    公开(公告)号:AU2006277926A1

    公开(公告)日:2007-02-15

    申请号:AU2006277926

    申请日:2006-08-04

    Applicant: BASF SE

    Abstract: The invention relates to an integrated process for preparing trioxane from formaldehyde in which a stream A1 comprising water and formaldehyde and a recycle stream B2 consisting substantially of water and formaldehyde are fed to a trioxane synthesis reactor in which the formaldehyde is converted to trioxane to obtain a product stream A2 comprising trioxane, water and formaldehyde; stream A2 is fed to a first distillation column and distilled at a pressure in the range from 0.1 to 2.5 bar to obtain a stream B1 enriched in trioxane, and the stream B2 consisting substantially of water and formaldehyde; stream B1 and a recycle stream D1 comprising trioxane, water and formaldehyde are fed to a second distillation column and distilled at a pressure in the range from 0.2 to 17.5 bar to obtain a product stream C2 consisting substantially of trioxane, and a stream C1 comprising trioxane, water and formaldehyde; stream C1 is fed to a third distillation column and distilled at a pressure in the range from 0.1 to 2.5 bar to obtain the recycle stream D1 comprising trioxane, water and formaldehyde, and a stream D2 consisting substantially of water and formaldehyde.

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