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    132.
    发明专利
    未知

    公开(公告)号：AT482012T

    公开(公告)日：2010-10-15

    申请号：AT04804129

    申请日：2004-12-21

    Applicant: BASF SE

    Inventor： LANG NEVEN ,  STROEFER ECKHARD ,  STAMMER ACHIM ,  FRIESE THORSTEN ,  SIEGERT MARKUS ,  OTT MICHAEL ,  HASSE HANS ,  GRUETZNER THOMAS ,  BLAGOV SERGEJ

    IPC: B01D3/36 ,  B01D3/14 ,  C07D323/06

    Abstract: A process for removing trioxane from a mixture I of formaldehyde, trioxane and water, by a) distilling the mixture I in a first distillation stage at a pressure of from 0.1 to 2 bar to obtain a stream II which comprises formaldehyde and a stream III which comprises predominantly trioxane and additionally water and formaldehyde, b) mixing the stream III with a recycle stream VII which comprises predominantly trioxane and additionally water and formaldehyde to obtain a stream IIIa which comprises predominantly trioxane and additionally water and formaldehyde, c) distilling the stream IIIa, if appropriate after removing low boilers from the stream III or IIIa in a further distillation stage, in a second distillation stage at a pressure of from 0.2 to 10 bar, the pressure in the second distillation stage being at least 0.1 bar higher than the pressure in the first distillation stage, to obtain a stream IV of trioxane and a stream V which comprises predominantly trioxane and additionally water and formaldehyde, d) distilling the stream V in a third distillation stage at a pressure of from 0.1 to 4 bar to obtain a stream VI which comprises predominantly water and additionally formaldehyde, and the recycle stream VII which comprises predominantly trioxane and additionally water and formaldehyde, e) if appropriate, distilling the stream VI in a fourth distillation stage to obtain a stream VIII which comprises predominantly water, and a stream IX which comprises predominantly formaldehyde.

    133.
    发明专利
    未知

    公开(公告)号：AT480496T

    公开(公告)日：2010-09-15

    申请号：AT03778287

    申请日：2003-10-27

    Applicant: BASF SE

    Inventor： WALSDORFF CHRISTIAN ,  FIENE MARTIN ,  KUHRS CHRISTIAN ,  STROEFER ECKHARD ,  HARTH KLAUS

    IPC: C01B7/04 ,  C01B7/07 ,  C07C263/10

    Abstract: Process for preparing chlorine from hydrochloric acid, which comprises the steps: a) providing a hydrochloric acid feed stream I; b) providing a hydrochloric acid recycle stream II; c) separating off a hydrogen chloride stream IV from the hydrochloric acid feed stream I and the hydrochloric acid recycle stream II in a distillation step; d) feeding the hydrogen chloride stream IV, an oxygen-containing steam V and, if desired, an oxygen-containing recycle stream Va into an oxidation zone and oxidizing hydrogen chloride to chlorine in the presence of a catalyst to give a product gas stream VI comprising chlorine, unreacted oxygen, unreacted hydrogen chloride and water vapor; e) separating off hydrogen chloride and water from the product gas stream VI in an absorption step to give a gas stream VII and the hydrochloric acid recycle stream II; f) if desired, drying the gas stream VII; g) separating off an oxygen-containing stream from the gas stream VII and, if desired, recirculating at least part of this as oxygen-containing recycle stream Va to the oxidation zone, leaving a chlorine-containing product stream VIII; h) if desired, further purifying the chlorine-containing product stream VIII.

    PROCEDIMIENTO PARA LA SEPARACION DE ISOCIANATOS A PARTIR DE UNA MEZCLA DE REACCION.
    135.
    发明专利
    PROCEDIMIENTO PARA LA SEPARACION DE ISOCIANATOS A PARTIR DE UNA MEZCLA DE REACCION. 未知

    公开(公告)号：ES2330518T3

    公开(公告)日：2009-12-11

    申请号：ES03789263

    申请日：2003-12-13

    Applicant: BASF SE

    Inventor： SOHN MARTIN ,  STROEFER ECKHARD ,  NEVEJANS FILIP ,  PENZEL ULRICH ,  PALLASCH HANS-JURGEN ,  SANDER MICHAEL

    IPC: C07C263/10 ,  C07C263/20 ,  C07C265/14

    Abstract: Procedimiento para la obtención de toluilendiisocianato mediante la reacción de aminas con fosgeno en un reactor y subsiguiente separación y purificación del isocianato a partir de la mezcla de la reacción, caracterizado porque la separación y la purificación del isocianato se lleva a cabo en una columna a una presión en cabeza comprendida entre 5 y 50 mbares, preferentemente comprendida entre 10 y 20 mbares, y con una temperatura de cola comprendida entre 90 y 250ºC, de manera preferente comprendida entre 120 y 170ºC, de manera especialmente preferente comprendida entre 130 y 150ºC, y la columna se hace trabajar a contracorriente entre el gas y el líquido, retirándose en estado líquido o gaseoso la corriente de isocianato puro por una descarga lateral de la columna y el tiempo de residencia en la cola de la columna no es mayor que 6 horas, referido a la descarga de cola, y porque la columna presenta una pared separadora vertical.

    PROCESS FOR SEPARATING TRIOXANE FROM A TRIOXANE/FORMALDEHYDE/WATER MIXTURE BY MEANS OF PRESSURE SWING RECTIFICATION
    138.
    发明专利
    PROCESS FOR SEPARATING TRIOXANE FROM A TRIOXANE/FORMALDEHYDE/WATER MIXTURE BY MEANS OF PRESSURE SWING RECTIFICATION 未知

    公开(公告)号：CA2701827A1

    公开(公告)日：2009-04-16

    申请号：CA2701827

    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: The invention describes a method for separating trioxane from a supply flow I of formaldehyde, trioxane, and water, wherein a) a supply flow I containing formaldehyde as the main component and trioxane and water as the secondary components, is provided, b) the supply flow, a return flow V, and a return flow VII containing formaldehyde as the main component and water and trioxane as the secondary components, are fed into a first distillation step and are distilled at a pressure of 0.1 to 2.5 bars, wherein a flow II containing formaldehyde as the main component and water as the secondary component, and a flow III containing trioxane as the main component and water and formaldehyde as the secondary components, and a flow X containing water, trioxane and formaldehyde, are obtained, c) the flow III, optionally after separating low boilers from the flow III in a low boiler separating step, is distilled in a second distillation step at a pressure of 0.2 to 17.5 bars, wherein the pressure in the second distillation step is higher than the pressure in the first distillation step by 0.1 to 15 bars, wherein a flow IV, substantially consisting of trioxane, and the return flow V containing trioxane as the main component and water and formaldehyde as the secondary components, are obtained, d) the flow IV is purified in at least one further trioxane distillation step at a head pressure of 0.5 to 2 bars, wherein purified trioxane is obtained as the lateral removal flow is obtained in the reinforcement part of the column, d) the flow X, and optionally a flow IX containing water as the main component, are fed into a third distillation step and distilled at a pressure of 1 to 10 bars, wherein a flow VI substantially consisting of water, and a return flow VII containing formaldehyde as the main component and water and trioxane as the secondary component, are obtained.

    PROCEDIMIENTO PARA LA SEPARACION DE TRIOXANO PARTIR DE UNA MEZCLA DE TRIOXANO/FORMALDEHIDO/AGUA POR MEDIO DE UNA RECTIFICACION CON CAMBIO DE PRESION.
    139.
    发明专利
    PROCEDIMIENTO PARA LA SEPARACION DE TRIOXANO PARTIR DE UNA MEZCLA DE TRIOXANO/FORMALDEHIDO/AGUA POR MEDIO DE UNA RECTIFICACION CON CAMBIO DE PRESION. 未知

    公开(公告)号：ES2314477T3

    公开(公告)日：2009-03-16

    申请号：ES04804133

    申请日：2004-12-21

    Applicant: BASF SE

    Inventor： SIEGERT MARKUS ,  LANG NEVEN ,  STROEFER ECKHARD ,  STAMMER ACHIM ,  FRIESE THORSTEN ,  HASSE HANS

    IPC: C07D323/06

    Abstract: Procedimiento para la separación de trioxano a partir de una corriente de partida I, constituida por formaldehído, por trioxano y por agua, según el cual a) se prepara una corriente de partida I, que contiene como componente principal formaldehído y que contiene como componentes secundarios trioxano y agua, b) se mezcla la corriente de partida I con una corriente de reciclo VII, que contiene como componente principal trioxano y que contiene como componentes secundarios formaldehído y agua, obteniéndose la corriente de partida Ia, que contiene como componente principal formaldehído y que contiene como componentes secundarios trioxano y agua, c) se destila la corriente de partida Ia en una primera etapa de destilación a una presión comprendida entre 0,1 y 2,5 bares, obteniéndose una corriente II, que contiene como componente principal formaldehído y que contiene como componente secundario agua, y una corriente III, que contiene como componente principal trioxano y que contiene como componentes secundarios agua y formaldehído, d) la corriente III, se destila, en caso dado tras la separación de los productos de bajo punto de ebullición procedentes de la corriente III, se destila en una etapa para la separación de los productos de bajo punto de ebullición en una segunda etapa de destilación, a una presión comprendida entre 0,2 y 17,5 bares, siendo la presión en la segunda etapa de destilación entre 0,1 y 15 bares mayor que la presión en la primera etapa de destilación, obteniéndose una corriente IV, que está constituida esencialmente por trioxano, y una corriente V, que contiene como componente principal trioxano y que contiene como componentes secundarios agua y formaldehído, e) en caso dado, la corriente V se mezcla con una corriente IX, que contiene agua como componente principal, obteniéndose una corriente Va con un contenido en agua mayor que el de la corriente V, conteniendo la corriente Va trioxano como componente principal y conteniendo agua y formaldehído como componentes secundarios, f) la corriente V o bien Va se destila en una tercera etapa de destilación a una presión comprendida entre 1 y 10 bares, obteniéndose una corriente VI, que está constituida esencialmente por agua, y la corriente de reciclo VII, que contiene como componente principal trioxano y que contiene como componentes secundarios agua y formaldehído.

    140.
    发明专利
    未知

    公开(公告)号：AT421372T

    公开(公告)日：2009-02-15

    申请号：AT06112836

    申请日：2004-03-03

    Applicant: BASF SE

    Inventor： STROEFER ECKHARD ,  LANG NEVEN ,  LICHTFERS UTE ,  STEINBRENNER ULRICH ,  HASSE HANS

    IPC: B01D1/22 ,  B01D1/30 ,  C08G2/08

    Abstract: A method for separating a liquid mixture containing readily-volatile and sparingly-volatile components involves using a film evaporator with a heat-exchange surface which is coated with material which catalyses the formation of readily-volatile component(s) in the liquid film. A method for separating a liquid mixture containing (A) readily-volatile and (B) sparingly-volatile components in a film evaporator by (i) producing a continuous stream of a liquid starting mixture, (ii) producing a liquid film from the mixture and bringing it into contact with a heat-exchange surface of the evaporator, and (iii) partly evaporating the film to give two gas streams rich in (A) and (B) respectively. In this method, (iv) the heat-exchange surface is coated with a catalytic material and (v) a chemical reaction in which (A) is/are formed is catalysed in the liquid film. An independent claim is also included for a film evaporator with a heat-exchanger wall which is coated with catalytic material.

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