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公开(公告)号：DE102004006649A1
公开(公告)日：2005-09-01
申请号：DE102004006649
申请日：2004-02-11
Applicant: BASF AG
Inventor： RUMPF BERND , STROEFER ECKHARD , LANG ORTMUND , LANG NEVEN
Abstract: A process for preparing a high-concentration formaldehyde solution by removing water from a lower-concentration formaldehyde solution having a formaldehyde content of from 5 to 50% by weight, in which the lower-concentration formaldehyde solution is fed to a preheater and heated in the preheater, depressurized via a pressure maintenance device and concentrated in a helical tube evaporator to give a vapor stream and the high-concentration formaldehyde solution as bottom stream, wherein the heated lower-concentration formaldehyde hyde solution is depressurized in the pressure maintenance device to give a two-phase mixture which is fed into the helical tube evaporator, is proposed.
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公开(公告)号：CA2681976A1
公开(公告)日：2008-10-09
申请号：CA2681976
申请日：2008-03-27
Applicant: BASF AG
Inventor： LANG NEVEN , STROEFER ECKHARD , SIEGERT MARKUS , HASSE HANS
IPC: C07D323/06
Abstract: The invention relates to a method for producing trioxane from trioxymethy lene glycol dimethyl ether (POMD- MEn=3) by reacting trioxymethylene glycol dimethyl ether in the presence of an acidic catalyst and subsequently proces sing the reaction mixture by distillation. The method comprises the followin g steps: a) feeding trioxymethylene glycol dimethyl ether (POMDMEn=3) or a m ixture containing trioxymethylene glycol dimethyl ether to a reactor and rea cting the substance in the presence of an acidic catalyst to give a mixture (a) containing trioxane, formaldehyde, water, methylene glycol (MG), polyoxy methylene glycols (MGn>1), methanol, hemiformals (HF), methylal (POMDMEn= 1) and polyoxymethylene glycol dimethyl ether (POMDMEn>1); b) separating the reaction mixture (a) by distillation to give a low-boiling fraction (b1) containing trioxane, formaldehyde, water, methylene glycol, methanol, hemif ormal (HFn=1), methylal and dioxymethylene glycol dimethyl ether (POMDMEn=2) and a high-boiling fraction (b2) containing polyoxymethylene glycols (MGn&g t;1), hemiformals (HFn>1) and polyoxymethylene glycol dimethyl ether (POM DMEn>2); c) separating the low-boiling fraction (b1) by distillation to g ive a low-boiling fraction (c1) containing formaldehyde, water, methylene gl ycol, methanol, hemiformal (HFn=1), methylal and dioxymethylene glycol dimet hyl ether (POMDMEn=2) and a high-boiling fraction (c2) containing trioxane.
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公开(公告)号：DE502005002701D1
公开(公告)日：2008-03-13
申请号：DE502005002701
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.
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公开(公告)号：CA2623594A1
公开(公告)日：2007-03-15
申请号：CA2623594
申请日：2006-09-06
Applicant: BASF AG
Inventor： LANG NEVEN , SIEGERT MARKUS , STAMMER ACHIM , STROEFER ECKHARD
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.
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公开(公告)号：CA2623572A1
公开(公告)日：2007-02-08
申请号：CA2623572
申请日：2006-07-19
Applicant: BASF AG
Inventor： GRUETZNER THOMAS , HASSE HANS , STAMMER ACHIM , SIEGERT MARKUS , FRIESE THORSTEN , BLAGOV SERGEJ , STROEFER ECKHARD , LANG NEVEN
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).
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Patent Agency Ranking
公开(公告)号：AT344693T
公开(公告)日：2006-11-15
申请号：AT04716558
申请日：2004-03-03
Applicant: BASF AG
Inventor： STROEFER ECKHARD , LANG NEVEN , LICHTFERS UTE , STEINBRENNER ULRICH , HASSE HANS
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.
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公开(公告)号：NO20062749L
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
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.
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公开(公告)号：NO20062493A
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
CPC classification number: F28D9/0031 , B01J8/0214 , B01J8/0285 , B01J8/0415 , B01J8/0419 , B01J8/0496 , B01J19/249 , B01J2208/0015 , B01J2208/00513 , B01J2208/025 , B01J2219/1923 , B01J2219/2453 , B01J2219/2455 , B01J2219/2458 , B01J2219/2459 , B01J2219/2462 , B01J2219/2481 , B01J2219/2485 , C07C45/38 , F28F2250/104 , C07C47/04
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公开(公告)号：DE10361517A1
公开(公告)日：2005-07-28
申请号：DE10361517
申请日：2003-12-23
Applicant: BASF AG
Inventor： OLBERT GERHARD , JOHANN THORSTEN , WEBER MARKUS , LANG NEVEN , HARTH KLAUS , STROEFER ECKHARD , FIENE MARTIN , SIEGERT MARKUS
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.
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20.发明专利
公开(公告)号：CA2548640A1
公开(公告)日：2005-07-14
申请号：CA2548640
申请日：2004-12-21
Applicant: BASF AG
Inventor： GRUETZNER THOMAS , STROEFER ECKHARD , HASSE HANS , BLAGOV SERGEJ , STAMMER ACHIM , OTT MICHAEL , SIEGERT MARKUS , FRIESE THORSTEN , LANG NEVEN
IPC: B01D3/36 , B01D3/14 , C07D323/06
Abstract: The invention relates to a method for separating trioxane from a mixture containing formaldehyde, trioxane and water. According to said method: the mixture (1) is distilled in a first distillation stage (7) at a pressure of between 0.1 and 2 bar to obtain a stream (8) containing formaldehyde and a stream (9) containing predominantly trioxane, in addition to water and formaldehyde; the stream (9) is mixed with a recycling stream (19) containin g predominantly trioxane, in addition to water and formaldehyde to form a stre am (10) containing predominantly trioxane, in addition to water and formaldehyd e; the stream (10) is then distilled in a second distillation stage (14) at a pressure of between 0.2 and 10 bar, optionally after the separation of low- boilers from the stream (9) or (10) in an additional distillation stage (11) . The pressure in the second distillation stage (14) is at least 0.1 bar highe r than the pressure in the first distillation stage (7). Said distillation produces a stream (15) consisting of trioxane and a stream (16) containing predominantly trioxane, in addition to water and formaldehyde. The stream (1 6) is then distilled in a third distillation stage (17) at a pressure of betwee n 0.1 and 4 bar, to obtain a stream (18) containing predominantly water, in addition to formaldehyde and the recycling stream (19) containing predominantly trioxane, in addition to water and formaldehyde. The resultant stream (18) is optionally distilled in a fourth distillation stage (20), to obtain a stream (21) containing predominantly water and a stream (22) containing predominantly formaldehyde.
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