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：AU2004308652A1

公开(公告)日：2005-07-14

申请号：AU2004308652

申请日：2004-12-23

Applicant: BASF AG

Inventor： JOHANN THORSTEN ,  HARTH KLAUS ,  OLBERT GERHARD ,  WEBER MARKUS ,  FIENE MARTIN ,  STROFER ECKHARD ,  SIEGERT MARKUS ,  LANG NEVEN

IPC: B01J8/02 ,  B01J8/04 ,  B01J19/24 ,  C07C45/38 ,  F28D9/00

Abstract: A process for preparing formaldehyde by gas-phase oxidation of methanol vapor by means of a gas stream comprising molecular oxygen in the presence of a fixed-bed catalyst comprising iron and molybdenum, wherein the process is carried out in a reactor ( 1 ) having heat-exchange plates ( 2 ) which are arranged in the longitudinal direction of the reactor ( 1 ) and have a spacing between them and through which a heat transfer medium flows, inlet and outlet facilities ( 3, 4 ) for the heat transfer medium to the heat-exchange plates ( 2 ) and also gaps ( 5 ) between heat-exchange plates ( 2 ) in which the fixed-bed catalyst is present and into which the methanol vapor and the gas stream comprising molecular oxygen are passed, is described.

公开(公告)号：DE10309288A1

公开(公告)日：2004-09-16

申请号：DE10309288

申请日：2003-03-04

Applicant: BASF AG

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

IPC: C07C45/00 ,  C07C45/82 ,  C07C47/058 ,  C02F1/08

Abstract: Process for preparing high-concentration gaseous formaldehyde having a molar CH 2 O:H 2 O ratio of >=0.6 from an aqueous formaldehyde solution by evaporation of at least part of the solution, in which the aqueous formaldehyde solution is heated to a vaporization temperature T and the gas phase formed is taken off, wherein the evaporation temperature T obeys the relationship: T[° C.]>=T' min [° C.] where T' min (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：NZ547317A

公开(公告)日：2010-09-30

申请号：NZ54731704

申请日：2004-12-23

Applicant: BASF AG

Inventor： OLBERT GERHARD ,  JOHANN THORSTEN ,  WEBER MARKUS ,  LANG NEVEN ,  STROEFER ECKHARD ,  FIENE MARTIN ,  SIEGERT MARKUS

IPC: B01J19/24 ,  B01J8/02 ,  B01J8/04 ,  C07C45/38 ,  F28D9/00

Abstract: A method for the production of formaldehyde by gas phase oxidation of methanol vapour with a gas flow containing a molecular oxygen in the presence of solid bed catalyst containing iron and molybdenum is carried out in a reactor (1) comprising thermal sheet metal plates (2) which are arranged in the longitudinal direction of the reactor (1) and spaced from each other. A heat transfer medium flows through the gaps between the plates. The heat transfer medium is transferred via inlets and outlets 3, 4 to the thermal sheet steel plates (2), and gaps (5) between the thermal sheet steel metal plates (2) and which are filled with the solid bed catalyst and into which the gas containing the methanol vapour and the molecular oxygen flows.

公开(公告)号：NO20080303L

公开(公告)日：2008-02-29

申请号：NO20080303

申请日：2008-01-16

Applicant: BASF AG

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

IPC: C07D323/06

Abstract: The invention relates to an integrated process for preparing trioxane from formaldehyde in which a stream A1 comprising water and formaldehyde and a recycle stream B2 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 A2 comprising trioxane, water and formaldehyde; stream A2 is 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 B1 enriched in trioxane, and the stream B2 consisting substantially of water and formaldehyde; stream B1 and a recycle stream D1 comprising trioxane, water and formaldehyde are 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 C2 consisting substantially of trioxane, and a stream C1 comprising trioxane, water and formaldehyde; stream C1 is fed to a third distillation column and distilled at a pressure in the range from 0.1 to 2.5 bar to obtain the recycle stream D1 comprising trioxane, water and formaldehyde, and a stream D2 consisting substantially of water and formaldehyde.

公开(公告)号：NO20080303A

公开(公告)日：2008-02-29

申请号：NO20080303

申请日：2008-01-16

Applicant: BASF AG

Inventor： STAMMER ACHIM ,  HASSE HANS ,  STROEFER ECKHARD ,  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：NO20080315L

公开(公告)日：2008-02-27

申请号：NO20080315

申请日：2008-01-18

Applicant: BASF AG

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

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：NO20080315A

公开(公告)日：2008-02-27

申请号：NO20080315

申请日：2008-01-18

Applicant: BASF AG

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