公开(公告)号：DE502006002395D1

公开(公告)日：2009-01-29

申请号：DE502006002395

申请日：2006-08-01

Applicant: BASF SE

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.

公开(公告)号：DE502006002339D1

公开(公告)日：2009-01-22

申请号：DE502006002339

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.

公开(公告)号：ES2297436T3

公开(公告)日：2008-05-01

申请号：ES04740321

申请日：2004-06-25

Applicant: BASF SE

Inventor： STEINBRENNER ULRICH ,  STROEFER ECKHARD ,  SOHN MARTIN ,  QUASCHNING VERONIKA ,  MOHWALD HELMUT ,  THIELE KAI

IPC: C07C209/78 ,  C07C209/86 ,  C07C211/50

Abstract: Procedimiento para la obtención de diaminodiarilmetanos, que comprende las etapas que consisten en a) la reacción de una amina aromática con un agente proporcionador de un grupo metileno en presencia de catalizadores ácidos, homogéneos, b) la separación del catalizador ácido, homogéneo, a partir del producto de la reacción, c) la elaboración y la purificación del producto de la reacción, caracterizado porque el catalizador ácido, homogéneo, se elimina de la mezcla de la reacción mediante adsorción sobre un agente de adsorción sólida y la regeneración del agente de adsorción se lleva a cabo con la amina, que se utiliza como producto de partida para el procedimiento.

公开(公告)号：AT389628T

公开(公告)日：2008-04-15

申请号：AT04717071

申请日：2004-03-04

Applicant: BASF SE

Inventor： STROEFER ECKHARD ,  LANG NEVEN ,  HASSE HANS ,  GRUETZNER THOMAS ,  OTT MICHAEL

IPC: C07C47/058 ,  C07C45/00 ,  C07C45/82

Abstract: Process for preparing high-concentration formaldehyde solutions having a CH 2 O content of >=50% by weight from an aqueous formaldehyde solution having a lower CH 2 O content by evaporation of part of this solution (partial evaporation), in which the aqueous formaldehyde solution is heated to an evaporation temperature T at which the gas phase becomes enriched in water relative to the liquid phase and the gas phase formed is taken off continuously or discontinuously, wherein the evaporation temperature T obeys the relationship: T[° C.] max [° C.] where T max (c)=A+Bx(c/100)+Cx(c/100) 2 +Dx(c/100) 3 and A=+68.759, B=+124.77, C=-12.851, D=-10.095, where c is the instantaneous CH 2 O content of the aqueous formaldehyde solution during the evaporation in percent by weight and is from 20 to 99% by weight.

公开(公告)号：MXPA06007121A

公开(公告)日：2006-10-01

申请号：MXPA06007121

申请日：2006-06-21

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.

公开(公告)号：HUE028076T2

公开(公告)日：2016-11-28

申请号：HUE11700347

申请日：2011-01-18

Applicant: BASF SE

Inventor： BOCK MICHAEL ,  FRANZKE AXEL ,  BAUMANN ROBERT ,  STROEFER ECKHARD

IPC: B01D3/14

公开(公告)号：HUE027599T2

公开(公告)日：2016-10-28

申请号：HUE11163223

申请日：2006-07-31

Applicant: BASF SE

Inventor： WOELFERT ANDREAS ,  KNOESCHE CARSTEN ,  HEILIG MANFRED ,  STROEFER ECKHARD

公开(公告)号：HUE026075T2

公开(公告)日：2016-05-30

申请号：HUE12172690

申请日：2007-12-12

Applicant: BASF SE

Inventor： WOELFERT ANDREAS ,  KNOESCHE CARSTEN ,  MATTKE TORSTEN ,  STROEFER ECKHARD

公开(公告)号：BR112012004604A2

公开(公告)日：2016-04-05

申请号：BR112012004604

申请日：2010-08-20

Applicant: BASF SE

Inventor： STROEFER ECKHARD ,  ARNDT JAN-DIRK ,  LESCHINSKI JULIA ,  HEINEN KERSTIN ,  DENISSEN LEO ,  MATTKE TORSTEN

IPC: C07C205/06 ,  C07C205/12 ,  C07C205/47

公开(公告)号：ES2552837T3

公开(公告)日：2015-12-02

申请号：ES11700347

申请日：2011-01-18

Applicant: BASF SE

Inventor： BOCK MICHAEL ,  FRANZKE AXEL ,  BAUMANN ROBERT ,  STROEFER ECKHARD

IPC: C07C263/04 ,  B01D3/14

Abstract: Método para la producción de isocianatos mediante escisión térmica de carbamatos y separación por destilación de la mezcla de reacción de la escisión de carbamato, que contiene el correspondiente isocianato y el correspondiente alcohol, en una columna (K) con una sección de enriquecimiento (V) y una sección de separación (A), en donde el carbamato (1) es añadido entre la sección de enriquecimiento (V) y la sección de separación (A), y el isocianato es retirado como componente de la corriente de fondo (2) y el alcohol es retirado como componente de la corriente de cabeza (3) de la columna (K), en presencia de un solvente inerte, caracterizado porque como solvente inerte se emplea un producto con punto de ebullición intermedio entre el punto de ebullición del isocianato y el punto de ebullición del alcohol bajo las condiciones de operación de la escisión de carbamato, el cual es inyectado en la zona superior de la sección de enriquecimiento (V) como flujo externo de retorno líquido (4), en una pureza> 95 % en peso, referida al peso total del flujo externo de retorno (4) y en la sección de separación (A) en una o varias posiciones como corriente (5) en forma de gas sobrecalentado.