公开(公告)号：WO2004078678A3

公开(公告)日：2004-11-04

申请号：PCT/EP2004002180

申请日：2004-03-04

Applicant: BASF AG ,  STROEFER ECKHARD ,  LANG NEVEN ,  HASSE HANS ,  GRUETZNER THOMAS ,  OTT MICHAEL

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

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

CPC classification number: C07C45/002 ,  C07C45/82 ,  C07C47/04

Abstract: A method for the production of highly concentrated formaldehyde solutions containing ≥ 50 wt. % CH2O from an aqueous formaldehyde solution having a lower CH2O content by evaporating part of said solution (partial evaporation), wherein the aqueous formaldehyde solution is heated to an evaporation temperature T wherein water becomes enriched in a gaseous phase in relation to the liquid phase and the formed gas phase is continuously or discontinuously removed. For the evaporation temperature T: T [ °C]

公开(公告)号：AT384710T

公开(公告)日：2008-02-15

申请号：AT05798084

申请日：2005-10-20

Applicant: BASF AG

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

IPC: C07D323/06

Abstract: Processes are disclosed comprising: (a) reacting an aqueous formaldehyde solution in a reactor in the presence of a suitable catalyst to obtain a reaction product mixture comprising trioxane, formaldehyde and water; (b) distilling the reaction product mixture to form a top stream comprising crude trioxane; and (c) treating the top stream in one or more additional stages to form pure trioxane; wherein an aqueous sidestream is drawn off during the distilling of the reaction mixture.

公开(公告)号：CA2627080A1

公开(公告)日：2007-05-10

申请号：CA2627080

申请日：2006-10-27

Applicant: BASF AG

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

IPC: C08G2/10 ,  C07D317/12 ,  C07D319/00 ,  C07D323/06

Abstract: The invention relates to a process for producing trioxane and at least one comonomer for producing (co)polymers on a trioxane basis, in which, in a first step, formaldehyde and at least one comonomer starting material are reacted in aqueous solution to form trioxane and comonomer, wherein a reaction mixture A1 containing trioxane, comonomer, formaldehyde, water and if appropriate comonomer starting material is obtained. In a second step, the reaction mixture A1 is distilled in a first distillation stage at a first pressure, wherein a trioxane- and comonomer-enriched stream B1 and an essentially water- , formaldehyde- and if appropriate comonomer starting material-containing stream B2 are obtained. In a third step, the stream B1 is distilled in a second distillation stage at a pressure which is above the pressure of the first distillation stage, wherein a trioxane-, comonomer- and water-containing stream C1 and a product stream C2 essentially consisting of comonomer and trioxane are obtained.

公开(公告)号：DE102005037294A1

公开(公告)日：2007-02-15

申请号：DE102005037294

申请日：2005-08-08

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 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：NO20062493L

公开(公告)日：2006-06-09

申请号：NO20062493

申请日：2006-05-31

Applicant: BASF AG

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

IPC: B01J19/24 ,  B01J8/02 ,  B01J8/04 ,  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：AU2004309046A1

公开(公告)日：2005-07-14

申请号：AU2004309046

申请日：2004-12-21

Applicant: BASF AG

Inventor： STROEFER ECKHARD ,  SIEGERT MARKUS ,  HASSE HANS ,  STAMMER ACHIM ,  LANG NEVEN ,  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：CA2654892A1

公开(公告)日：2007-12-21

申请号：CA2654892

申请日：2007-06-11

Applicant: BASF AG

Inventor： LANG NEVEN ,  STROEFER ECKHARD ,  SIGWART CHRISTOPH ,  SIEGERT MARKUS

IPC: C07D323/06

Abstract: Integrated method for the preparation of trioxane from formaldehyde, comp rising the steps: a) introduction of a feeding flow A1 containing formaldehy de and water and a return flow B3 consisting essentially of formaldehyde and trioxane into a formaldehyde concentration unit, wherein said flows are sep arated into a formaldehyde-rich flow A2 and a flow A3 consisting essentially of water; b) introduction of a product flow C1, containing trioxane, water, and formaldehyde, a return flow E1 containing trioxane, water, and formalde hyde, and possibly flow A2 into a first low-pressure distillation column, wh erein said flows are distilled at a pressure of from 0.1 to 1.5 atmospheres, with a trioxane-enriched flow B1 containing predominantly trioxane, and als o water and formaldehyde, a slough removal flow B2 consisting essentially of formaldehyde and water, and the return flow B3 containing predominantly wat er, and also formaldehyde and trioxane removed as a side removal flow; c) in troduction of a slough removal flow B2 and possibly the flow A2 into a triox ane synthesis reactor, wherein said flows are allowed to react, and wherein the flow C1 containing trioxane, water, and formaldehyde is obtained; d) int roduction of a flow B1 into a mid-pressure distillation column, wherein said flow is distilled at a pressure of from 1.0 to3.0 atmospheres, wherein a lo w boiler stream D1 containing methanol, methylal, and methylformate,and a st ream D2 containing predominantly trioxane and also formaldehyde and water ar e obtained; e) introduction of a stream D2 into a high-pressure distillation column, wherein said stream is distilled at a pressure of from 2.5 to 10.0 atmospheres, wherein the return flow E1 contains trioxane, water, and formal dehyde, and a product flow E2 consisting essentially of trioxane is obtained ; wherein flow A2 can be introduced into either the low-pressure distillatio n column or into the trioxane-35 synthesis reactor, or into both.

公开(公告)号：CA2623573A1

公开(公告)日：2007-02-15

申请号：CA2623573

申请日：2006-08-01

Applicant: BASF AG

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

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：NO20062749A

公开(公告)日：2006-07-12

申请号：NO20062749

申请日：2006-06-13

Applicant: BASF AG

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

IPC: B01D3/14 ,  B01D3/36 ,  C07D323/06

CPC classification number: C07D323/06 ,  B01D3/146 ,  B01D3/36 ,  Y02P20/127

公开(公告)号：DE102004051118A1

公开(公告)日：2006-04-27

申请号：DE102004051118

申请日：2004-10-20

Applicant: BASF AG

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

IPC: C07D323/06

Abstract: Processes are disclosed comprising: (a) reacting an aqueous formaldehyde solution in a reactor in the presence of a suitable catalyst to obtain a reaction product mixture comprising trioxane, formaldehyde and water; (b) distilling the reaction product mixture to form a top stream comprising crude trioxane; and (c) treating the top stream in one or more additional stages to form pure trioxane; wherein an aqueous sidestream is drawn off during the distilling of the reaction mixture.