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    METHOD FOR REMOVING FORMIC ACID FROM A TRIOXANE-CONTAINING MIXTURE
    1.
    发明申请
    METHOD FOR REMOVING FORMIC ACID FROM A TRIOXANE-CONTAINING MIXTURE 审中-公开
    从三氧化物混合物中去除抗酸的方法

    公开(公告)号：WO2009027434A2

    公开(公告)日：2009-03-05

    申请号：PCT/EP2008061222

    申请日：2008-08-27

    Applicant: BASF SE ,  SZARVAS LASZLO ,  LANG NEVEN ,  SIGWART CHRISTOPH ,  SIEGERT MARKUS ,  WINDLIN FRANZ NIKLAUS ,  STROEFER ECKHARD

    Inventor： SZARVAS LASZLO ,  LANG NEVEN ,  SIGWART CHRISTOPH ,  SIEGERT MARKUS ,  WINDLIN FRANZ NIKLAUS ,  STROEFER ECKHARD

    IPC: C07D323/06

    CPC classification number: C07D323/06

    Abstract: The invention relates to a method for removing formic acid from a mixture that contains formaldehyde, trioxane, water and formic acid, by distillation. According to said method, at least one tertiary amine and/or an imine or a mixture thereof capable of deprotonation and conversion to a salt is added, prior to or during distillation, to the mixture in a catalytic amount or in an amount sufficient to form the salt with the entire amount of formic acid, and the formic acid/amine salt is removed in a liquid phase in the distillation sump.

    Abstract translation: 在对甲酸从甲醛，三恶烷，水和通过蒸馏甲酸含酸混合物中分离的方法进行之前的混合物中使用，或者在蒸馏过程中，至少一种叔胺和/或亚胺或它们的混合物，所述去质子的甲酸，并在 盐以催化量或足以与总量的甲酸盐化的量存在，并且将所形成的甲酸 - 胺盐在蒸馏塔底物中以液相排出。

    Procedimiento para la obtención de trioxano crudo
    2.
    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.

    4.
    发明专利
    未知

    公开(公告)号：BRPI0615856A2

    公开(公告)日：2012-12-18

    申请号：BRPI0615856

    申请日：2006-09-06

    Applicant: BASF SE

    Inventor： STROEFER EICKHARD ,  STAMMER ACHIM ,  SIEGERT MARKUS ,  LANG NEVEN

    IPC: C07D317/12

    Abstract: Processes comprising: providing a reactive distillation column having an upper region, a middle region and a lower region; feeding ethylene glycol and an aqueous formaldehyde solution into the reactive distillation column in the middle region of the reactive distillation column; reacting the ethylene glycol and the aqueous formaldehyde solution in the reactive distillation column in the presence of a catalyst to form dioxolane; removing a product stream comprising dioxolane in an amount of at least 75% by weight from the upper region of the reactive distillation column; and removing a bottom stream comprising one or more components having boiling points higher than dioxolane from the lower region of the reactive distillation column.

    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.

    8.
    发明专利
    未知

    公开(公告)号：AT485287T

    公开(公告)日：2010-11-15

    申请号：AT08718289

    申请日：2008-03-27

    Applicant: BASF SE

    Inventor： STROEFER ECKHARD ,  LANG NEVEN ,  SIEGERT MARKUS ,  HASSE HANS

    IPC: C07D323/06

    Abstract: A process for preparing trioxane from trioxymethylene glycol dimethyl ether (POMDMEn=3) by converting trioxymethylene glycol dimethyl ether in the presence of an acidic catalyst and subsequent distillative workup of the reaction mixture, comprising the steps of: a) feeding trioxymethylene glycol dimethyl ether (POMDMEn=3) or a mixture comprising trioxymethylene glycol dimethyl ether into a reactor and converting it in the presence of an acidic catalyst to a mixture a comprising trioxane, formaldehyde, water, methylene glycol (MG), polyoxymethylene glycols (MGn>1), methanol, hemiformals (HF), methylal (POMDMEn=1) and polyoxymethylene glycol dimethyl ethers (POMDMEn>1); b) distillatively separating the reaction mixture a into a low boiler fraction b1 comprising formaldehyde, water, methylene glycol, methanol, hemiformal (HFn=1), methylal and dioxymethylene glycol dimethyl ether (POMDMEn=2), and a high boiler fraction b2 comprising trioxane, polyoxymethylene glycols (MGn>1), hemiformals (HFn>1) and polyoxymethylene glycol dimethyl ethers (POMDMEn>2); c) distillatively separating the high boiler fraction b2 into a low boiler fraction c1 comprising trioxane, and a high boiler fraction c2 comprising polyoxymethylene glycols (MGn>1), hemiformals (HFn>1) and polyoxymethylene glycol dimethyl ethers (POMDMEn>2).

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