公开(公告)号：DE102005036544A1

公开(公告)日：2007-02-15

申请号：DE102005036544

申请日：2005-08-03

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, comprising the steps of: a) 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 and allowed to react to obtain a product stream A 2 comprising trioxane, water and formaldehyde; b) stream A 2 is fed to a first low-pressure distillation column and distilled at a pressure of from 0.1 to 2.5 bar to obtain a stream B 1 enriched in trioxane and additionally comprising water and formaldehyde, and the recycle stream B 2 consisting substantially of formaldehyde and water; c) stream B 1 and a recycle stream D 1 comprising trioxane, water and formaldehyde are fed to a second low-pressure distillation column and distilled at a pressure of from 0.1 to 2.5 bar to obtain a stream C 1 comprising predominantly trioxane and additionally formaldehyde and water, and a stream C 2 consisting substantially of formaldehyde and water; d) stream C 1 is fed to a high-pressure distillation column and distilled at a pressure of from 0.2 to 17.5 bar to obtain the recycle stream D 1 and a product stream D 2 consisting substantially of trioxane, in which a removal of the low boilers present in streams B 1 or C 1 may be undertaken between steps b) and c) or c) and d).

公开(公告)号：DE102005015984A1

公开(公告)日：2006-10-12

申请号：DE102005015984

申请日：2005-04-07

Applicant: BASF AG

Inventor： HELWIG EKATERINA ,  SEIDL VOLKER ,  ZOELLNER KNUT ,  STAMMER ACHIM

IPC: C08G2/08 ,  C08G2/10 ,  C08G2/18

Abstract: Preparation of an oxymethylene homo- and/or copolymer (A) comprises spray polymerizing formaldehyde monomer or cyclic formaldehyde oligomer (preferably trioxane), and optionally an anionic or cationic co-monomer initiator in a reactor.

公开(公告)号：NO20062811L

公开(公告)日：2006-07-14

申请号：NO20062811

申请日：2006-06-15

Applicant: BASF AG

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

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：DE102004058707A1

公开(公告)日：2006-06-08

申请号：DE102004058707

申请日：2004-12-06

Applicant: BASF AG

Inventor： LANG NEVEN ,  STAMMER ACHIM ,  STROEFER ECKHARD ,  SIEGERT MARKUS

IPC: C07D323/06

公开(公告)号：DE102004040284A1

公开(公告)日：2006-02-23

申请号：DE102004040284

申请日：2004-08-19

Applicant: BASF AG

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

IPC: B01D3/14 ,  C07D323/06

Abstract: The present invention relates to a process for distillatively removing pure trioxane from a feedstream (I) comprising trioxane in a proportion of at least 50% by weight, based on the total weight of the feedstream (I), and additionally formaldehyde and water, which comprises feeding the feedstream I and a further aqueous stream (II) which does not contain any components extraneous to the feedstream to a dividing wall column (TWK 1 ) having a dividing wall TW which is arranged substantially perpendicularly and divides the column interior into a feed region (A 1 ), a withdrawal reaction (B 1 ), an upper combined column region (C 1 ) and a lower combined column region (D 1 ), and drawing off from the first dividing wall column (TWK 1 ) a bottom stream (III) comprising pure trioxane and a sidestream (IV) at the withdrawal region (B 1 ), comprising pure water.

公开(公告)号：DE10361518A1

公开(公告)日：2005-07-28

申请号：DE10361518

申请日：2003-12-23

Applicant: BASF AG

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

IPC: B01D3/14 ,  B01D3/36 ,  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.

公开(公告)号：CA2549897A1

公开(公告)日：2005-07-14

申请号：CA2549897

申请日：2004-12-21

Applicant: BASF AG

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

IPC: C07D323/06

Abstract: The invention relates to a method for separating trioxane from an inlet flow (I) consisting of formaldehyde, trioxane and water.Said method consists in a ) preparing an inlet flow (I), which contains formaldehyde as the main compone nt and trioxane and water as auxiliary components, b) mixing the inlet flow (I) with a return flow (VII) containing trioxane as the main component and formaldehyde and water as auxiliary components. An inlet flow (Ia), which contains formaldehyde as the main component and trioxane and water as the auxiliary components, is obtained. Said method also consists in c) distillin g the inlet flow (Ia) in a first distillation step at a pressure of between 0. 1 2.5 bars, thus enabling a flow (II), which contains formaldehyde as the main component and water as the auxiliary component, and a flow (III), which contains trioxane as the main component and water and formaldehyde as the auxiliary components, to be obtained, d) distilling the flow (III), optional ly after separating materials at a low-boiling point from the flow (III) in a l ow- boiling separation step and in a second distillation step at a pressure of between 0.2 17.5 bars, whereby the pressure in the second distillation step is 0.1 - 15 bars higher than the pressure in the first distillation step. A flo w (IV) is obtained which is essentially made of trioxane, and also a flow V which contains trioxane as the main component and water and formaldehyde as the auxiliary components, e) optionally mixing the flow (V) with a flow (IX) , which contains water as the main component, in order to obtain a flow (Va) having a higher water content than flow (V), whereby flow (Va) contains trioxane as the main component and water and formaldehyde as the auxiliary components, f) distilling the flow (V) and/or flow (Va) in a third in distillation step at a pressure of between 1 - 10 bars, whereby a flow (VI), which is essentially made of water, and the return flow (VII), which contain s trioxane as the main component and water and formaldehyde as the auxiliary components, are obtained.

公开(公告)号：DE50006856D1

公开(公告)日：2004-07-22

申请号：DE50006856

申请日：2000-12-28

Applicant: BASF AG

Inventor： DERNBACH MATTHIAS ,  KRATZ DETLEF ,  STAMMER ACHIM ,  SCHULZ GERHARD

IPC: C07C29/88 ,  C07C29/141 ,  C07C29/80 ,  C07C31/22

Abstract: A process is provided for increasing the yield in the preparation of polyhydric alcohols obtained from methylolated alkanals by hydrogenation, wherein derivatives of these alcohols are decomposed by adding 5 ppm to 1% by weight, preferably 100 to 1000 ppm, of a suitable acid to an anhydrous mixture containing these derivatives, heating the mixture to temperatures of 100 to 300° C. and then separating off the polyhydric alcohol by distillation. This process makes it possible simply and efficiently to decompose compounds which boil above the polyhydric alcohol and are unwanted by-products of its synthesis.

公开(公告)号：DE59709121D1

公开(公告)日：2003-02-13

申请号：DE59709121

申请日：1997-10-15

Applicant: BASF AG

Inventor： FISCHER MARTIN ,  KAIBEL GERD ,  STAMMER ACHIM ,  FLICK KLEMENS ,  QUAISER STEFAN ,  HARDER WOLFGANG ,  MASSONNE KLEMENS

IPC: B01J8/04 ,  B01J19/24 ,  B01J19/26 ,  C01B15/029

Abstract: A process for preparing a hydrogen peroxide solution having a hydrogen peroxide content of not less than 2.5% by weight, which comprises continuously reacting hydrogen and oxygen in an aqueous, alcoholic or aqueous/alcoholic reaction medium in the presence of a catalyst containing palladium.

公开(公告)号：MXPA02006394A

公开(公告)日：2002-11-29

申请号：MXPA02006394

申请日：2000-12-21

Applicant: BASF AG

Inventor： DERNBACH MATTHIAS ,  KRATZ DETLEF ,  STAMMER ACHIM ,  RUST HARALD ,  SCHULZ GERHARD

IPC: C07B61/00 ,  C07C29/80 ,  C07C31/22

Abstract: La invencion se refiere a un metodo para llevar a cabo la destilacion pura de trimetilolpropano que proviene de la hidrogenacion de 2,2-dimetilolbutanal a traves de las siguientes etapas: (a) reaccion de n-butiraldehido con formaldehido en presencia de cantidades cataliticas de una amina terciaria e hidrogenacion de la mezcla que se obtiene de tal manera que se forme una mezcla que contiene trimetilopropano; (b) separacion de agua metanol, trialquilamina y/o formato de trialquilamonio mediante destilacion; (c) calentamiento del residuo obtenido en (b), en vacio, a una temperatura en la cual TMP es volatil y a la cual compuestos que hierven a temperaturas mayores que la temperatura de ebullicion de TMP son disociados mientras se separa por destilacion TMP asi como compuestos que son menos volatiles que TMP; (d) destilacion del destilado obtenido en (c) mientras se separan los compuestos -menos volatiles y obtencion de TMP puro; (e) realizacion de la destilacion facultativa del TMP obtenido en (d) con el objeto de obtener TMP que tiene un indice de color alfa bajo. La invencion se refiere tambien al metodo en el cual formato de trialquilamonio es separado por destilacion mientras se conserva, a partir de mezclas brutas que consisten de alcoholes polivalentes, principalmente trimetilolpropano.