公开(公告)号：NZ564178A

公开(公告)日：2009-11-27

申请号：NZ56417806

申请日：2006-06-12

Applicant: BASF AG

Inventor： STROEFER ECKHARD ,  HASSE HANS ,  BLAGOV SERGEJ

IPC: C07C41/56 ,  C08G2/08

Abstract: A process for preparing tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4) by reacting formaldehyde with methanol and subsequently working up the reaction mixture by distillation is disclosed, wherein the process comprises the steps of: a) feeding aqueous formaldehyde solution and methanol into a reactor and reacting to give 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 reactive evaporator and separating into a low boiler fraction b1 comprising formaldehyde, water, methanol, methylene glycol, polyoxymethylene glycols, hemiformals, methylal and polyoxymethylene glycol dimethyl ethers (POMDMEn>1), and a high boiler fraction b2 comprising polyoxymethylene glycols, hemiformals (HFn>1) and polyoxymethylene glycol dimethyl ethers (POMDMEn>3), and recycling the high boiler fraction b2 into the reactor (step a)); c) feeding the low boiler fraction b1 into a first distillation column and separating into a low boiler fraction c1 comprising formaldehyde, water, methylene glycol, methanol, hemiformals, methylal, di-, tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=2,3,4), and a high boiler fraction c2 comprising polyoxymethylene glycols, high-boiling hemiformals (HFn>1) and high-boiling polyoxymethylene glycol dimethyl ethers (POMDMEn>4), and recycling the high boiler fraction c2 into the reactive evaporator (step b)); d) feeding the low boiler fraction c1 into a second distillation column and separating into a low boiler fraction d1 comprising formaldehyde, water, methanol, polyoxymethylene glycols, hemiformals, methylal and dioxymethylene glycol dimethyl ether methylene glycol, polyoxymethylene glycols, tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4); e) feeding the high boiler fraction d2 into a phase separation apparatus and separating into an aqueous phase e1 substantially consisting of 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 third 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 tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4); and g) optionally feeding the aqueous phase e1 into a fourth distillation column and separating into a low boiler fraction g1 substantially consisting of formaldehyde, water, methylene glycol and polyoxymethylene glycols, and a high boiler fraction substantially consisting of water.

公开(公告)号：CA2451869C

公开(公告)日：2009-11-24

申请号：CA2451869

申请日：2002-07-02

Applicant: BASF AG

Inventor： STROEFER ECKHARD ,  KRUEGER HEINZ ,  WOSTBROCK KARL-HEINZ ,  THIEL JOACHIM ,  WEBER MARKUS ,  SACHWEH BERND ,  KERTH STEFFEN ,  GERBER BERND ,  RUMPF BERND

IPC: B01D3/14 ,  C01B21/14 ,  B01D3/16 ,  B01J19/30 ,  B01J19/32

Abstract: The invention relates to a method for producing a highly pure, aqueous hydroxylamine solution by distilling an aqueous solution, devoid of salt, of a hydroxyl ammonium salt in a plate column comprising at least two mechanical plates. Said method is characterised in that packing bodies are arranged between at least two plates of the plate column over the cross-section of sa id column.

公开(公告)号：MX2008001005A

公开(公告)日：2008-03-25

申请号：MX2008001005

申请日：2006-08-04

Applicant: BASF AG

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

IPC: C07D323/06

Abstract: La invencion se relaciona con un proceso integrado para prepara trioxano de formaldehido en el que una corriente A1 que comprende agua y formaldehido y una corriente B2 de reciclado que consiste substancialmente de agua y formaldehido se alimentan a un reactor de sintesis de trioxano en el que el formaldehido se convierte en trioxano para obtener una corriente A2 de producto que comprende trioxano, agua y formaldehido; la corriente A2 se alimenta a una primera columna de destilacion y se destila a una presion en la escala de 0.1 a 2.5 bar para obtener una corriente B1 enriquecida en trioxano, y la corriente B2 que consiste substancialmente de agua y formaldehido; la corriente B1 y la corriente D1 de reciclado que comprende trioxano, agua y formaldehido se alimentan a una segunda columna de destilacion y se destilan a una presion en la escala de 0.2 a 17.5 bar para obtener una corriente C2 de producto que consiste substancialmente detrioxano, y una corriente C1 que comprende trioxano, agua y formaldehido; la corriente C1 se alimenta a una tercera columna de destilacion y se destila a una presion en la escala de 0.1 a 2.5 bar para obtener la corriente D1 de reciclado que comprende trioxano, agua y formaldehido, y una corriente D2 que consiste substancialmente de agua y formaldehido. (Figura 1).

公开(公告)号：ES2290748T3

公开(公告)日：2008-02-16

申请号：ES04763900

申请日：2004-08-06

Applicant: BASF AG

Inventor： WALSDORFF CHRISTIAN ,  FIENE MARTIN ,  SESING MARTIN ,  METELKINA OLGA ,  SEIDEMANN LOTHAR ,  STROEFER ECKHARD

IPC: C01B7/04

Abstract: Procedimiento para la obtención de cloro mediante oxidación catalítica en fase gaseosa de cloruro de hidrógeno, con los pasos: a) se pone a disposición una corriente gaseosa de alimentación I que contiene cloruro de hidrógeno, y una corriente gaseosa de alimentación II que contiene oxígeno; b) en una primera etapa de oxidación se alimentan la corriente gaseosa de alimentación I, la corriente gaseosa de alimentación II, en caso dado una recirculación Ia que contiene cloruro de hidrógeno, y en caso dado una recirculación IIa que contiene oxígeno, en una primera zona de oxidación, y se ponen en contacto con un primer catalizador de oxidación, oxidándose una primera cantidad parcial de cloruro de hidrógeno para dar cloro, y obteniéndose una corriente gaseosa III que contiene cloro, oxígeno no transformado, cloruro de hidrógeno no transformado y vapor de agua; c) en una segunda etapa de oxidación se alimenta la corriente gaseosa III a una segunda zona de oxidación, y se pone en contacto con al menos otro catalizador de oxidación, oxidándose una segunda cantidad parcial de cloruro de hidrógeno para dar cloro, y obteniéndose una corriente gaseosa de producto IV, que contiene cloro, oxígeno no transformado, cloruro de hidrógeno no transformado y vapor de agua; d) a partir de la corriente gaseosa de producto IV se obtiene cloro, en caso dado la recirculación Ia, y en caso dado la recirculación IIa, caracterizado porque el primer catalizador de oxidación se presenta en la primera zona de oxidación como lecho fluidizado, y el catalizador o catalizadores de oxidación adicionales se presentan en la segunda zona de oxidación en una carga de lecho fijo.

公开(公告)号：MX2007014949A

公开(公告)日：2008-02-15

申请号：MX2007014949

申请日：2006-06-12

Applicant: BASF AG

Inventor： STROEFER ECKHARD ,  HASSE HANS ,  BLAGOV SERGEJ

IPC: C08G65/00

Abstract: Un proceso para preparar eter dimetilico de tri- y tetraoximetilenglicol (POMDMEn=3,4) haciendo reaccionar formaldehido con metanol y subsecuentemente trabajar la mezcla de reaccion mediante destilacion, que comprende los pasos de: a) alimentar solucion de formaldehido acuosa y metanol hacia un reactor y hacer reaccionar para proporcionar una mezcla que comprende formaldehido, agua, metilenglicol (MG), polioximetilenglicoles (MGn>1), metanol, hemiformales (HF), metilal (POMDMEn=1) y esteres dimetilicos de polioximetilenglicol (POMDMEn>1); b) alimentar la mezcla de reaccion a una primera columna de destilacion y separar en una fraccion b1 de ebullidor bajo y una fraccion b2 de ebullidor alto que comprende formaldehido, agua, metanol, polioximetilenglicoles, hemiformales y esteres dimetilicos de polioximetilenglicol (POMDMEn>1); c) alimentar la fraccion b2 de ebullidor alto en una segunda columna de destilacion y separar hacia una fraccion c1 de ebullidor bajo que comprende formaldehido, agua, metilenglicol, polioximetilenglicoles, metanol, hemiformales, y eter dimetailico de di-, t6ri-y tetraoximetilenglicol (POMDMEn=2,3,4), y una fraccion c2 de ebullidor alto; d) alimentar la fraccion c1 de ebullidor bajo a un tercera columna de destilacion y separar en una fraccion d1 de ebullidor bajo y una fraccion d2 de ebullidor alto que consiste substancialmente de formaldehido, agua, metilenglicol, polioximetilenglicoles, eter dimetilico de tri- y tetraoximetilenglicol (POMDMEn=3,4); e) alimentar la fraccion d2 de ebullidor alto a un aparato de separacion de fase y separar en una fase e1 acuosa que consiste substancialmente de formaldehido, agua, metilenglicol y polioximetilenglicoles, y una fase e2 organica que comprende eter dimetilico de tri- y tetraoximetlenglicol (POMDMEn=3,4); f) alimentar la fase e2 organica en una cuarta columna de destilacion y separar en una fraccion f1 de ebullidor bajo que consiste substancialmente de formaldehido, agua, metilenglicol y polioximetilenglicoles, y una fraccion f2 de ebullidor alto que consiste substancialmente de eter dimetilico de tri- y tetraoximetilenglicol (POMDMEn=3,4).

公开(公告)号：DE502004005838D1

公开(公告)日：2008-02-14

申请号：DE502004005838

申请日：2004-06-25

Applicant: BASF AG

Inventor： STEINBRENNER ULRICH ,  STROEFER ECKHARD ,  SOHN MARTIN ,  QUASCHNING VERONIKA ,  MOEHWALD HELMUT ,  THIELE KAI ,  DEBERDT FILIP ,  JACOBS JAN D ,  PINKOS ROLF

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

Abstract: A process is described for preparing diaminodiarylmethanes comprising the steps a) reacting an aromatic amine with a methylene-donating agent in the presence of homogeneous acid catalysts, b) removing the homogeneous acid catalyst from the reaction product, c) working up and purifying the reaction product, which comprises removing the homogeneous acid catalyst from the reaction mixture by adsorption to a solid adsorbent.

公开(公告)号：NO20076065L

公开(公告)日：2008-01-14

申请号：NO20076065

申请日：2007-11-26

Applicant: BASF AG

Inventor： HASSE HANS ,  STROEFER ECKHARD ,  BLAGOV SERGEJ

IPC: C08G65/00 ,  C07C41/56 ,  C08G2/08

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：AT372299T

公开(公告)日：2007-09-15

申请号：AT04763900

申请日：2004-08-06

Applicant: BASF AG

Inventor： WALSDORFF CHRISTIAN ,  FIENE MARTIN ,  SESING MARTIN ,  METELKINA OLGA ,  SEIDEMANN LOTHAR ,  STROEFER ECKHARD ,  HARTH KLAUS

IPC: C01B7/04

Abstract: The invention relates to a process for preparing chlorine by catalytic gas-phase oxidation of hydrogen chloride, which comprises the steps: a) providing a feed gas stream I comprising hydrogen chloride and a feed gas stream II comprising oxygen; b) in a first oxidation stage, feeding the feed gas stream I, the feed gas stream II, if desired a recycle stream la comprising hydrogen chloride and if desired an oxygen-containing recycle stream IIa into a first oxidation zone and bringing them into contact with a first oxidation catalyst so that a first partial amount of the hydrogen chloride is oxidized to chlorine and a gas stream III comprising chlorine, unreacted oxygen, unreacted hydrogen chloride and water vapor is obtained; c) in a second oxidation stage, feeding the gas stream III into a second oxidation zone and bringing it into contact with at least one further oxidation catalyst so that a second partial amount of the hydrogen chloride is oxidized to chlorine and a product gas stream IV comprising chlorine, unreacted oxygen, unreacted hydrogen chloride and water vapor is obtained; d) isolating chloride, if desired the recycle stream Ia and if desired the recycle stream IIa from the product gas stream IV, wherein the first oxidization catalyst in the first oxidation zone is present in a fluidized bed and the further oxidation catalyst or catalysts in the second oxidation zone is/are present in a fixed bed.

公开(公告)号：DE102005051974A1

公开(公告)日：2007-05-03

申请号：DE102005051974

申请日：2005-10-31

Applicant: BASF AG

Inventor： LANG NEVEN ,  BOEHLING RALF ,  STAMMER ACHIM ,  OLDENBURG JAN ,  SIEGERT MARKUS ,  STROEFER ECKHARD

IPC: C07D323/06 ,  C07D317/12

Abstract: Preparation of trioxane and at least a comonomer for the preparation of (co)polymer on trioxane basis, comprises (a) converting formaldehyde and at least a co-monomer educt to trioxane and co-monomer in an aqueous solution to obtain a reaction mixture; (b) distilling the reaction mixture in a first distillation step at a first pressure to obtain stream (B1) and a stream (B2); and (c) distilling the stream (B1) in a second distillation step to obtain stream (C1) containing trioxane, co-monomer and water, and a product stream (C2) containing co-monomer and trioxane. Preparation of trioxane and at least a co-monomer for the preparation of (co)polymer on trioxane basis, comprises: (a) converting formaldehyde and at least a co-monomer educt to trioxane and co-monomer in an aqueous solution to obtain a reaction mixture containing trioxane, co-monomer, formaldehyde, water and optionally co-monomer educt, by synthesis step; (b) distilling the reaction mixture in a first distillation step at a first pressure to obtain stream (B1) enriched with trioxane and comonomer, and a stream (B2) containing water, formaldehyde and optionally comonomer-educt; and (c) distilling the stream (B1) in a second distillation step at a pressure above the pressure of the first distillation step to obtain stream (C1) containing trioxane, co-monomer and water, and a product stream (C2) containing co-monomer and trioxane.

公开(公告)号：BRPI0417859A

公开(公告)日：2007-04-27

申请号：BRPI0417859

申请日：2004-12-21

Applicant: BASF AG

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.