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    3.
    发明专利
    未知

    公开(公告)号：DE102005037294A1

    公开(公告)日：2007-02-15

    申请号：DE102005037294

    申请日：2005-08-08

    Applicant: BASF AG

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

    IPC: C07D323/06

    Abstract: The invention relates to an integrated process for preparing trioxane from formaldehyde in which, in a first step, a stream A 1 comprising water and formaldehyde and a recycle stream B 2 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 A 2 comprising trioxane, water and formaldehyde. Stream A 2 and a recycle stream D 1 comprising trioxane, water and formaldehyde are 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 B 1 enriched in trioxane, and the stream B 2 consisting substantially of water and formaldehyde. Stream B 1 is 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 C 2 consisting substantially of trioxane, and a stream C 1 comprising trioxane, water and formaldehyde. Stream C 1 is fed to a third distillation column and distilled at a pressure in the range from 1 to 10 bar to obtain the recycle stream D 1 comprising trioxane, water and formaldehyde, and a stream D 2 consisting substantially of water.

    Method for producing polyoxymethylene dimethyl ethers from methanol and formaldehyde
    4.
    发明专利
    Method for producing polyoxymethylene dimethyl ethers from methanol and formaldehyde 未知

    公开(公告)号：AU2006259100A1

    公开(公告)日：2006-12-21

    申请号：AU2006259100

    申请日：2006-06-12

    Applicant: BASF AG

    Inventor： BLAGOV SERGEJ ,  HASSE HANS ,  STROFER ECKHARD

    IPC: C08G2/08 ,  C07C41/56

    Abstract: Processes for preparing tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4) include feeding a reaction mixture of an aqueous formaldehyde solution and methanol into a reactive evaporator and separating into a first low boiler fraction and a first high boiler fraction, recycling the first high boiler fraction into the reactor, feeding the first low boiler fraction into a first distillation column and separating into a second low boiler fraction and a second high boiler fraction, recycling the second high boiler fraction into the reactive evaporator, feeding the second low boiler fraction into a second distillation column and separating into a third low boiler fraction and a third high boiler fraction, feeding the third high boiler fraction into a phase separation apparatus and separating into an aqueous phase and an organic phase, and feeding the organic phase into a third distillation column and separating into a low and high boiler fractions.

    5.
    发明专利
    未知

    公开(公告)号：BRPI0611612A2

    公开(公告)日：2011-02-22

    申请号：BRPI0611612

    申请日：2006-06-12

    Applicant: BASF AG

    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.

    PROCESS FOR PREPARING POLYOXYMETHYLENE DIMETHYL ETHERS FROM METHANOL AND FORMALDEHYDE
    8.
    发明专利
    PROCESS FOR PREPARING POLYOXYMETHYLENE DIMETHYL ETHERS FROM METHANOL AND FORMALDEHYDE 未知

    公开(公告)号：CA2610895A1

    公开(公告)日：2007-05-10

    申请号：CA2610895

    申请日：2006-06-12

    Applicant: BASF AG

    Inventor： HASSE HANS ,  STROEFER ECKHARD ,  BLAGOV SERGEJ

    IPC: C08G65/00

    Abstract: A process for preparing tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4) by reacting formaldehyde with methanol and subsequently workin g up the reaction mixture by distillation, comprising the steps of: a) feeding aqueous formaldehyde solution and methanol into a reactor and reacting to gi ve a mixture a comprising formaldehyde, water, methylene glycol (MG), polyoxymethylene glycols (MGn>1), methanol, hemiformals (HF), methylal (POMDMEn=1) and polyoxymethylene glycol dimethyl ethers (POMDMEn>1); b) feeding the reaction mixture a into a first distillation column and separati ng into a low boiler fraction b1 and a high boiler fraction b2 comprising formaldehyde, water, methanol, polyoxymethylene glycols, hemiformals and polyoxymethylene glycol dimethyl ethers (POMDMEn>1); c) feeding the high boiler fraction b2 into a second distillation column and separating into a l ow boiler fraction c1 comprising formaldehyde, water, methylene glycol, polyoxymethylene glycols, methanol, hemiformals, di-, tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=2,3,4) and a high boiler fraction c2; d) feeding the low boiler fraction c1 into a third distillation column and separating into a low boiler fraction d1 and a high boiler fracti on d2 substantially consisting of formaldehyde, water, methylene glycol, polyoxymethylene glycols, tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4); e) feeding the high boiler fraction d2 into a phase separatio n apparatus and separating into an aqueous phase e1 substantially consisting o f formaldehyde, water, methylene glycol and polyoxymethylene glycols, and an organic phase e2 comprising tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4); f) feeding the organic phase e2 into a fourth distillation column and separating into a low boiler fraction f1 substantially consisting of formaldehyde, water, methylene glycol and polyoxymethylene glycols, and a high boiler fraction f2 substantially consisting of tri- and tetraoxymethyle ne glycol dimethyl ether (POMDMEn=3,4).

    INTEGRATED METHOD FOR THE PRODUCTION OF TRIOXANE FROM FORMALDEHYDE
    9.
    发明专利
    INTEGRATED METHOD FOR THE PRODUCTION OF TRIOXANE FROM FORMALDEHYDE 未知

    公开(公告)号：CA2623573A1

    公开(公告)日：2007-02-15

    申请号：CA2623573

    申请日：2006-08-01

    Applicant: BASF AG

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

    IPC: C07D323/06

    Abstract: The invention relates to an integrated process for preparing trioxane from formaldehyde in which, in a first step, a stream A 1 comprising water and formaldehyde and a recycle stream B 2 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 A 2 comprising trioxane, water and formaldehyde. Stream A 2 and a recycle stream D 1 comprising trioxane, water and formaldehyde are 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 B 1 enriched in trioxane, and the stream B 2 consisting substantially of water and formaldehyde. Stream B 1 is 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 C 2 consisting substantially of trioxane, and a stream C 1 comprising trioxane, water and formaldehyde. Stream C 1 is fed to a third distillation column and distilled at a pressure in the range from 1 to 10 bar to obtain the recycle stream D 1 comprising trioxane, water and formaldehyde, and a stream D 2 consisting substantially of water.

    REMOCION DE TRIOXANO DE UNA MEZCLA DE TRIOXANO / FORMALDEHIDO / AGUA.
    10.
    发明专利
    REMOCION DE TRIOXANO DE UNA MEZCLA DE TRIOXANO / FORMALDEHIDO / AGUA. 未知

    公开(公告)号：MXPA06006761A

    公开(公告)日：2006-09-04

    申请号：MXPA06006761

    申请日：2004-12-21

    Applicant: BASF AG

    Inventor： BLAGOV SERGEJ

    IPC: B01D3/14 ,  B01D3/36 ,  C07D323/06 ,  B01D03/14 ,  B01D03/36

    Abstract: Un proceso par remover trioxano de una mezcla I de formaldehido, trioxano y agua, a) por destilar la mezcla I en una primera etapa de destilacion a una presion de 0.1 a 2 bar para obtener una corriente II que comprende formaldehido y una corriente III que comprende principalmente trioxano y adicionalmente agua y formaldehido, b) mezclar la corriente III con una corriente VII de reciclado que comprende principalmente trioxano y adicionalmente agua y formaldehido para obtener una corriente IIIa que comprende principalmente trioxano y adicionalmente agua y Formaldehido, c) destilar la corriente IIIa, si es apropiado despues de remover los generadores bajos de la corriente III o IIIa en una etapa de destilacion adicional, en una segunda etapa de destilacion a una presion de 0.2 a 10 bar, la presion en la segunda etapa de destilacion siendo cuando menos 0.1 bar superior que la presion en la primera etapa de destilacion, para obtener una corriente IV de trioxano y una corriente V que comprende principalmente trioxano y adicionalmente agua y formaldehido, d) destilar la corriente V en una tercera etapa de destilacion a una presion de 0.1 a 4 bar para obtener una corriente VI que comprende principalmente agua y adicionalmente formaldehido y la corriente VII reciclado que comprende principalmente trioxano y adicionalmente agua y formaldehido, e) si es apropiado, destilar la corriente VI en una cuarta etapa de destilacion para obtener una corriente VIII que comprende principalmente agua, y una corriente IX que comprende principalmente formaldehido.

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