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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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公开(公告)号：AU2008337624A1
公开(公告)日：2009-06-25
申请号：AU2008337624
申请日：2008-12-11
Applicant: BASF SE
Inventor： KORTEKAMP TOBIAS , LANG NEVEN , STROEFER ECKHARD , SIEGERT MARKUS , SIGWART CHRISTOPH
IPC: C08G2/10 , C07D323/06
Abstract: A process for preparing polyoxymethylene homopolymers or copolymers (7) by homopolymerization or copolymerization of trioxane, starting from methanol (1), in which methanol (1) is oxidized in a first reactor in a first production plant (A) to give an aqueous formaldehyde-comprising stream (2) which is fed to a second production plant (B) in which pure trioxane (6) is obtained and removal of low boilers (5) by distillation is carried out and the pure trioxane (6) is fed to a third production plant (C) in which it is homopolymerized or copolymerized to form polyoxymethylene homopolymers or copolymers (7), wherein the low boiler stream (5) from the low boiler removal column (K 2) is recycled to the feed stream into the first reactor in the first production plant (A), is proposed.
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103.发明专利
公开(公告)号：PL1699776T3
公开(公告)日：2009-04-30
申请号：PL04804133
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
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公开(公告)号：DK1893667T3
公开(公告)日：2009-03-30
申请号：DK06841251
申请日：2006-06-12
Applicant: BASF SE
Inventor： STROEFER ECKHARD , HASSE HANS , BLAGOV SERGEJ
IPC: C08G65/00
Abstract: Preparing tri-/tetra oxymethylene glycol dimethylether (I) comprises e.g. distilling an aqueous formaldehyde solution and methanol in a reactor to form a reaction mixture containing polyoxy methylene glycol dimethylether (III); distilling the reaction mixture to form a high-boiling fraction (A2) containing e.g. (III); distilling (A2) to form e.g. a low-boiling fraction (A3) having e.g. (I); distilling (A3) to form a high-boiling fraction (A5) having e.g. (I); and distilling (A5) to form an organic phase containing (I). Preparing tri-/tetra oxymethylene glycol dimethylether through the conversion of formaldehyde with methanol and successive distillation of a reaction mixture, comprises: feeding an aqueous formaldehyde solution and methanol in a reactor to form the reaction mixture containing formaldehyde, water, methylene glycol, polyoxymethylene glycol, methanol, hemiformal, methylal and polyoxymethylene glycol dimethylether (III); feeding the reaction mixture into a first distillation column (5) and separating a low-boiling fraction (A1) containing formaldehyde, water, methylene glycol, methanol, methylal and polyoxy methylene glycoldimethylether and a high-boiling fraction (A2) containing formaldehyde, water, methanol, polyoxymethylene glycol, hemiformal and (III); feeding (A2) into a second distillation column (8) and separating a low-boiling fraction (A3) containing formaldehyde, water, methylene glycol, polyoxymethylene glycol, methanol, hemiformal, di-chloroethylene and (I) and a high-boiling containing polyoxymethylene glycol, high-boiling hemiformal and high-boiling polyoxymethylene glycol dimethylether; feeding (A3) and optionally feed-back stream containing formaldehyde, water, methylene glycol and polyoxymethylene glycol into a third distillation column (13) and separating a high volatile fraction (A4) containing formaldehyde, water, methanol, polyoxymethylene glycol, hemiformal and dioxymethylene glycol dimethylether and a high-boiling fraction (A5) containing formaldehyde, water, methylene glycol, polyoxymethylene glycol and (I); feeding (A5) in to a phase separator and separating an aqueous phase containing formaldehyde, water, methylene glycol and polyoxymethyleneglycol and an organic phase containing (I); feeding the organic phase into a fourth distillation column (18) and separating a low-boiling fraction (A6) containing formaldehyde, water, methylene glycol and polyoxymethylene glycol and a high-boiling fraction containing (I); and optionally feeding the aqueous phase in a fifth distillation column (24) and separating a low-boiling fraction (A7) containing formaldehyde, water, methylene glycol and polyoxymethylene glycol and a high-boiling fraction containing water.
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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
Inventor： SIGWART CHRISTOPH , STROEFER ECKHARD , LANG NEVEN , SIEGERT MARKUS
IPC: C07D323/06
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.
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Patent Agency Ranking
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
Inventor： SIEGERT MARKUS , LANG NEVEN , STROEFER ECKHARD , STAMMER ACHIM , FRIESE THORSTEN , HASSE HANS
IPC: 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 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.
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公开(公告)号：PL1805162T3
公开(公告)日：2008-07-31
申请号：PL05798084
申请日：2005-10-20
Applicant: BASF SE
Inventor： SIEGERT MARKUS , LANG NEVEN , STROEFER ECKHARD , STAMMER ACHIM , FRIESE THORSTEN
IPC: C07D323/06
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公开(公告)号：DE50212277D1
公开(公告)日：2008-06-26
申请号：DE50212277
申请日：2002-11-05
Applicant: BASF SE
Inventor： STROEFER ECKHARD , SOHN MARTIN , HASSE HANS , SCHILLING KLEMENS
Abstract: In an aqueous formaldehyde solution comprising formaldehyde in the form of monomeric formaldehyde, methylene glycol and polyoxymethylene glycols in a total concentration x of >=65% by weight, the mean molar mass {overscore (M of the polyoxymethylene glycols is, as a function of the formaldehyde concentration, equal to or less than the values given by equation I: ( M _ g / mol ) = 48 + 6.589 . 10 - 1 . ( x % by weight ) + 4.725 . 10 2 . ( x % by weight ) 2 - 3.434 . 10 - 3 . ( x % by weight ) 3 + 9.625 . 10 - 5 . ( x % by weight ) 4 - 1.172 . 10 6 . ( x % by weight ) 5 + 5.357 . 10 - 9 . ( x % by weight ) 6 ( I ) where: {overscore (M is the mean molar mass, and x is the total concentration of formaldehyde in the form of monomeric formaldehyde, methylene glycol and polyoxymethylene glycols in % by weight (total formaldehyde concentration).
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公开(公告)号：PT1401802E
公开(公告)日：2008-05-30
申请号：PT02745367
申请日：2002-06-06
Applicant: BASF SE
Inventor： MULLER CHRISTIAN , STROEFER ECKHARD , WOELFERT ANDREAS
IPC: C07C263/10 , C07C265/14
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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
Inventor： LANG NEVEN , BLAGOV SERGEJ , GRUTZNER THOMAS , STROEFER ECKHARD , HASSE HANS , STAMMER ACHIM , FRIESE THORSTEN , SIEGERT MARKUS
IPC: C07D323/06
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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