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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.

    METHOD FOR SEPARATING TRIOXANE FROM A TRIOXANE/ FORMALDEHYDE/ WATER MIXTURE BY MEANS OF PRESSURE CHANGE RECTIFICATION
    3.
    发明专利
    METHOD FOR SEPARATING TRIOXANE FROM A TRIOXANE/ FORMALDEHYDE/ WATER MIXTURE BY MEANS OF PRESSURE CHANGE RECTIFICATION 未知

    公开(公告)号：MY159275A

    公开(公告)日：2016-12-30

    申请号：MYPI2010001564

    申请日：2008-09-22

    Applicant: BASF SE

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

    IPC: C07D323/06 ,  B01D3/14

    Abstract: A PROCESS FOR SEPARATING TRIOXANE FROM A FEED STREAM I (8) COMPRISING FORMALDEHYDE, TRIOXANE AND WATER, IN WHICH A) A FEED STREAM I (8) COMPRISING FORMALDEHYDE AS MAIN COMPONENT AND TRIOXANE AND WATER AS SECONDARY COMPONENTS IS PROVIDED, B) THE FEED STREAM I (8), A RECYCLE STREAM V (12) AND A RECYCLE STREAM VII (15) COMPRISING FORMALDEHYDE AS MAIN COMPONENT AND WATER AND TRIOXANE AS SECONDARY COMPONENTS ARE FED INTO A FIRST DISTILLATION STAGE AND DISTILLED AT A PRESSURE OF FROM 0.01 TO 0.25 MPA (0.1 TO 2.5 BAR) TO GIVE A STREAM II (6) COMPRISING FORMALDEHYDE AS MAIN COMPONENT AND WATER AS SECONDARY COMPONENT AND A STREAM III (9) COMPRISING TRIOXANE AS MAIN COMPONENT AND WATER AND FORMALDEHYDE AS SECONDARY COMPONENTS AND A STREAM X COMPRISING WATER, TRIOXANE AND FORMALDEHYDE, C) THE STREAM III (9) IS, IF APPROPRIATE AFTER REMOVAL OF LOW BOILERS FROM THE STREAM III (9) IN A LOW BOILER REMOVAL STAGE, DISTILLED IN A SECOND DISTILLATION STAGE AT A PRESSURE OF FROM 0.02 TO 1.75 MPA (0.2 TO 17.5 BAR), WITH THE PRESSURE IN THE SECOND DISTILLATION STAGE BEING FROM 0.01 TO 1.5 MPA (0.1 TO 15 BAR) HIGHER THAN THE PRESSURE IN THE FIRST DISTILLATION STAGE, TO GIVE A STREAM IV (11) CONSISTING ESSENTIALLY OF TRIOXANE AND THE RECYCLE STREAM V (12) COMPRISING TRIOXANE AS MAIN COMPONENT AND WATER AND FORMALDEHYDE AS SECONDARY COMPONENTS, C1) THE STREAM IV (11) IS PURIFIED IN AT LEAST ONE FURTHER TRIOXANE DISTILLATION STAGE AT A PRESSURE AT THE TOP OF FROM 0.05 TO 0.2 MPA (0.5 TO 2 BAR) TO GIVE PURIFIED TRIOXANE AS SIDE OFFTAKE STREAM XII IN THE ENRICHMENT SECTION OF THE COLUMN (10), D) THE STREAM X AND, IF APPROPRIATE, A STREAM IX (3) COMPRISING WATER AS MAIN COMPONENT ARE FED INTO A THIRD DISTILLATION STAGE AND DISTILLED AT A PRESSURE OF FROM 0.1 TO 1 MPA (1 TO 10 BAR) TO GIVE A STREAM VI (14) CONSISTING ESSENTIALLY OF WATER AND A RECYCLE STREAM VII (15) COMPRISING FORMALDEHYDE AS MAIN COMPONENT AND WATER AND TRIOXANE AS SECONDARY COMPONENTS, IS DESCRIBED. (FIGURE 1)

    6.
    发明专利
    未知

    公开(公告)号：AT516282T

    公开(公告)日：2011-07-15

    申请号：AT08804546

    申请日：2008-09-22

    Applicant: BASF SE

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

    IPC: C07D323/06 ,  B01D3/14

    Abstract: A process for separating trioxane from a feed stream I comprising formaldehyde, trioxane and water, in which a) a feed stream I comprising formaldehyde as main component and trioxane and water as secondary components is provided, b) the feed stream I, a recycle stream V and a recycle stream VII comprising formaldehyde as main component and water and trioxane as secondary components are fed into a first distillation stage and distilled at a pressure of from 0.1 to 2.5 bar to give a stream II comprising formaldehyde as main component and water as secondary component and a stream III comprising trioxane as main component and water and formaldehyde as secondary components and a stream X comprising water, trioxane and formaldehyde, c) the stream III is, if appropriate after removal of low boilers from the stream III in a low boiler removal stage, distilled in a second distillation stage at a pressure of from 0.2 to 17.5 bar, with the pressure in the second distillation stage being from 0.1 to 15 bar higher than the pressure in the first distillation stage, to give a stream IV consisting essentially of trioxane and the recycle stream V comprising trioxane as main component and water and formaldehyde as secondary components, c1) the stream IV is purified in at least one further trioxane distillation stage at a pressure at the top of from 0.5 to 2 bar to give purified trioxane as side offtake stream XII in the enrichment section of the column, d) the stream X and, if appropriate, a stream IX comprising water as main component are fed into a third distillation stage and distilled at a pressure of from 1 to 10 bar to give a stream VI consisting essentially of water and a recycle stream VII comprising formaldehyde as main component and water and trioxane as secondary components, is described.

    7.
    发明专利
    未知

    公开(公告)号：AT489376T

    公开(公告)日：2010-12-15

    申请号：AT06793286

    申请日：2006-09-06

    Applicant: BASF SE

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

    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.

    PROCESS FOR PREPARING POLYOXYMETHYLENE HOMOPOLYMERS OR COPOLYMERS BY HOMOPOLYMERIZATION OR COPOLYMERIZATION OF TRIOXANE, STARTING FROM METHANOL
    9.
    发明专利
    PROCESS FOR PREPARING POLYOXYMETHYLENE HOMOPOLYMERS OR COPOLYMERS BY HOMOPOLYMERIZATION OR COPOLYMERIZATION OF TRIOXANE, STARTING FROM METHANOL 未知

    公开(公告)号：CA2707613A1

    公开(公告)日：2009-06-25

    申请号：CA2707613

    申请日：2008-12-11

    Applicant: BASF SE

    Inventor： SIEGERT MARKUS ,  KORTEKAMP TOBIAS ,  STROEFER ECKHARD ,  SIGWART CHRISTOPH ,  LANG NEVEN

    IPC: C08G2/10 ,  C07D323/06

    Abstract: Disclosed is a method for producing polyoxymethylene homopolymers or copolymers (7) by homopolymerizing or copolymerizing trioxane, starting from methanol (1) that is oxidized in a first reactor of a first production system (A) such that an aqueous formaldehyde-containing stream (2) is obtained that is fed to a second production system (B) in which pure trioxane (6) is obtained. In said method, low-boiling fractions (5) are separated by distillation, and the pure trioxane (6) is fed to a third production system (C) in which the pure trioxane (6) is homopolymerized or copolymerized to obtain polyoxymethylene homopolymers or copolymers (7). The disclosed method is characterized in that the stream of low-boiling fractions (5) is recycled from the column (K 2) separating low-boiling fractions into the inlet of the first reactor in the first production system (A).

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