公开(公告)号：AT421372T

公开(公告)日：2009-02-15

申请号：AT06112836

申请日：2004-03-03

Applicant: BASF SE

Inventor： STROEFER ECKHARD ,  LANG NEVEN ,  LICHTFERS UTE ,  STEINBRENNER ULRICH ,  HASSE HANS

IPC: B01D1/22 ,  B01D1/30 ,  C08G2/08

Abstract: A method for separating a liquid mixture containing readily-volatile and sparingly-volatile components involves using a film evaporator with a heat-exchange surface which is coated with material which catalyses the formation of readily-volatile component(s) in the liquid film. A method for separating a liquid mixture containing (A) readily-volatile and (B) sparingly-volatile components in a film evaporator by (i) producing a continuous stream of a liquid starting mixture, (ii) producing a liquid film from the mixture and bringing it into contact with a heat-exchange surface of the evaporator, and (iii) partly evaporating the film to give two gas streams rich in (A) and (B) respectively. In this method, (iv) the heat-exchange surface is coated with a catalytic material and (v) a chemical reaction in which (A) is/are formed is catalysed in the liquid film. An independent claim is also included for a film evaporator with a heat-exchanger wall which is coated with catalytic material.

公开(公告)号：CA2673572A1

公开(公告)日：2008-07-31

申请号：CA2673572

申请日：2008-01-23

Applicant: BASF SE

Inventor： KIRSCHBAUM JULIA ,  STROEFER ECKHARD ,  SIEGERT MARKUS ,  THIEL JOACHIM ,  LANG NEVEN

IPC: B01D3/14 ,  C07D323/06

Abstract: The invention relates to a method for separating trioxane from an inlet f low (I) consisting of formaldehyde, trioxane and water. Said method consists in a) preparing an inlet flow (I), which contains formaldehyde as the main component and trioxane and water as auxiliary components, b) feeding the inl et flow (I), a return flow (V) and a return flow (VII), containing formaldeh yde as the main component and trioxane and water auxiliary components, into a first distillation step and distilling it at a pressure of between 0.1 to 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 con tains trioxane as the main component and water and formaldehyde as the auxil iary components, and a flow (X), which contains water, trioxane and formalde hyde to be obtained, c) distilling the flow (III), optionally after separati ng materials at a low-boiling point from the flow (III) in a low-boiling sep aration step and in a second distillation step at a pressure of between 0.2 to 17. 5 bars, whereby the pressure in the second distillation step is 0.1 t o 15 bars higher that the pressure in the first distillation step. A flow (I V) is obtained which is essentially made of trioxane, and also a return flow (V), which contains trioxane as the main component and water and formaldehy de as the auxiliary components, d) feeding the flow (X) and optionally a flo w (IX), which contains water as the main component, into a third distillatio n step and distilling it at a pressure of between 1 to 10 bars, whereby a fl ow (VI), which is essentially made of water, and a return flow (VII), which contains formaldehyde as the main component and water and trioxane as the au xiliary components, are obtained.

公开(公告)号：ES2299095T3

公开(公告)日：2008-05-16

申请号：ES05798084

申请日：2005-10-20

Applicant: BASF SE

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

IPC: C07D323/06

Abstract: Procedimiento para la producción de trioxan con las siguientes etapas del procedimiento: - reacción catalizada ácida de una disolución de formaldehído altamente concentrada (1) en un reactor (R) con obtención de una mezcla trioxan/formaldehído/agua (2) (etapa I del procedimiento), - destilación de la mezcla trioxan/formaldehído/agua (2) de la etapa I del procedimiento con obtención de trioxan bruto como corriente de cabeza (3) (etapa II del procedimiento) y - procesamiento destilativo del trioxan bruto (3) de la etapa II del procedimiento en una o varias etapas adicionales del procedimiento con obtención de trioxan puro (8), caracterizado porque en la etapa II del procedimiento se extrae una corriente lateral acuosa (4).

公开(公告)号：NO20081132A

公开(公告)日：2008-05-08

申请号：NO20081132

申请日：2008-03-04

Applicant: BASF SE

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

IPC: C07D317/12

CPC classification number: C07D317/12 ,  Y02P20/127

公开(公告)号：DE502004006575D1

公开(公告)日：2008-04-30

申请号：DE502004006575

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：NO20080529A

公开(公告)日：2008-02-29

申请号：NO20080529

申请日：2008-01-29

Applicant: BASF SE

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

IPC: C07D323/06

CPC classification number: C07D323/06 ,  Y02P20/125

公开(公告)号：AU2006289088A1

公开(公告)日：2007-03-15

申请号：AU2006289088

申请日：2006-09-06

Applicant: BASF SE

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

IPC: C07D317/12

Abstract: Processes comprising: providing a reactive distillation column having an upper region, a middle region and a lower region; feeding ethylene glycol and an aqueous formaldehyde solution into the reactive distillation column in the middle region of the reactive distillation column; reacting the ethylene glycol and the aqueous formaldehyde solution in the reactive distillation column in the presence of a catalyst to form dioxolane; removing a product stream comprising dioxolane in an amount of at least 75% by weight from the upper region of the reactive distillation column; and removing a bottom stream comprising one or more components having boiling points higher than dioxolane from the lower region of the reactive distillation column.

公开(公告)号：AU2006278026A1

公开(公告)日：2007-02-15

申请号：AU2006278026

申请日：2006-08-01

Applicant: BASF SE

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

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：AU2006274886A1

公开(公告)日：2007-02-08

申请号：AU2006274886

申请日：2006-07-19

Applicant: BASF SE

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

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).