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    Procedimiento para la obtención de trioxano crudo
    1.
    发明专利
    Procedimiento para la obtención de trioxano crudo 未知

    公开(公告)号：ES2430618T3

    公开(公告)日：2013-11-21

    申请号：ES08863030

    申请日：2008-12-11

    Applicant: BASF SE BASF SE

    Inventor： SIEGERT MARKUS ,  LANG NEVEN ,  THIEL JOACHIM ,  STROEFER ECKHARD ,  SIGWART CHRISTOPH

    IPC: C07D323/06

    Abstract: Procedimiento para la obtención de trioxano crudo (1) con una concentración en el intervalo de un 50 a un 75 %en peso de trioxano, mediante trimerización de formaldehído a partir de una disolución acuosa de formaldehído (2)en presencia de un catalizador ácido (3), y concentración por destilación de trioxano a partir de la mezcla dereacción de trimerización, caracterizado porque - la trimerización de formaldehído y la concentración de trioxano a partir de la mezcla de reacción de trimerización sellevan a cabo en una única columna (K), - que está separada a través de una chapa de separación horizontal (T) en una zona de columna inferior (A) y unazona de columna superior (B), estando unidas la zona de columna inferior (A) y la zona de columna inferior (B) através de un conducto de vapor externo y un conducto de líquido externo, - llevándose a cabo una destilación de reactivos en la zona de columna inferior (A) a una presión entre 1 y 5 bar,trimerizándose el formaldehído para dar trioxano, y concentrándose el trioxano en la mezcla de reacción hasta límitede solubilidad de formaldehído, y - llevándose a cabo una destilación en la zona de columna superior (B) a una presión entre 200 y 900 mbar,concentrándose el trioxano crudo a una concentración en el intervalo de un 50 a un 75 % en peso.

    2.
    发明专利
    未知

    公开(公告)号：BRPI0808459A2

    公开(公告)日：2014-07-15

    申请号：BRPI0808459

    申请日：2008-01-23

    Applicant: BASF SE

    Inventor： LANG NEVEN ,  THIEL JOACHIM ,  STROEFER ECKHARD ,  KIRSCHBAUM JULIA ,  SIEGERT MARKUS

    IPC: B01D3/14 ,  C07D323/06

    Abstract: A process for removing trioxane from a use stream I of formaldehyde, trioxane and water, by a) providing a use stream I which comprises formaldehyde as the main component and trioxane and water as the secondary components, b) feeding the use stream I, a recycle stream V and a recycle stream VII which comprises formaldehyde as the main component and water and trioxane as the secondary components into a first distillation stage and distilling to obtain a stream II a steam III and formaldehyde as the and a steam X c) distilling the stream III, in a second distillation stage the pressure in the second distillation stage being from 0.1 to 15 bar higher than the pressure in the first distillation stage, to obtain a stream IV and the recycle stream V as the secondary components, d) feeding the stream X and if appropriate a stream IX into a third distillation stage and distilling at a pressure of from 1 to 10 bar to obtain a stream VI which consists substantially of water and a recycle stream VII which comprises formaldehyde as the main component and water and trioxane as the secondary components.

    6.
    发明专利
    未知

    公开(公告)号：AT518574T

    公开(公告)日：2011-08-15

    申请号：AT08708109

    申请日：2008-01-23

    Applicant: BASF SE

    Inventor： LANG NEVEN ,  THIEL JOACHIM ,  STROEFER ECKHARD ,  KIRSCHBAUM JULIA ,  SIEGERT MARKUS

    IPC: B01D3/14 ,  C07D323/06

    Abstract: A process for removing trioxane from a use stream I of formaldehyde, trioxane and water, by a) providing a use stream I which comprises formaldehyde as the main component and trioxane and water as the secondary components, b) feeding the use stream I, a recycle stream V and a recycle stream VII which comprises formaldehyde as the main component and water and trioxane as the secondary components into a first distillation stage and distilling to obtain a stream II a steam III and formaldehyde as the and a steam X c) distilling the stream III, in a second distillation stage the pressure in the second distillation stage being from 0.1 to 15 bar higher than the pressure in the first distillation stage, to obtain a stream IV and the recycle stream V as the secondary components, d) feeding the stream X and if appropriate a stream IX into a third distillation stage and distilling at a pressure of from 1 to 10 bar to obtain a stream VI which consists substantially of water and a recycle stream VII which comprises formaldehyde as the main component and water and trioxane as the secondary components.

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