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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.
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公开(公告)号：DE50103216D1
公开(公告)日：2004-09-16
申请号：DE50103216
申请日：2001-01-12
Applicant: BASF AG
Inventor： AUER HEINZ , BESSLING BERND , HAMMER HANS , HASSE HANS , SAUER FRIEDRICH , VICARI MAXIMILIAN , ADRIAN TILL
Abstract: The invention relates to a process for obtaining anhydrous or substantially anhydrous formic acid, in which firstly aqueous formic acid is produced by hydrolysis of methyl formate, with the methanol content in the methyl formate having been reduced in advance. The process according to the invention has the special feature that-before the hydrolysis of the methyl formate-the methanol content of the methanol-containing methyl formate is reduced in a distillation column, this distillation column simultaneously being employed for other separation functions during work-up of the formic acid.
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公开(公告)号：DE10309286A1
公开(公告)日：2004-09-16
申请号：DE10309286
申请日：2003-03-04
Applicant: BASF AG
Inventor： STROEFER ECKHARD , GRUETZNER THOMAS , HASSE HANS
IPC: C07C45/78 , C07C45/82 , C07C47/058
Abstract: Method of stabilizing high-concentration formaldehyde solutions having a CH 2 O content of >70% by weight against precipitation of solids, which comprises heating the high-concentration formaldehyde solution at a heating rate of at least 5° C./min to a temperature of from 80° C. to 200° C. immediately after it has been prepared and storing it at a temperature in this range.
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公开(公告)号：BR0213904A
公开(公告)日：2004-08-31
申请号：BR0213904
申请日：2002-11-05
Applicant: BASF AG
Inventor： FER ECKHARD ST , SOHN MARTIN , HASSE HANS , SCHILLING KLEMENS
Abstract: In an aqueous formaldehyde solution comprising formaldehyde in the form of monomeric formaldehyde, methylene glycol and polyoxymethylene glycols in a total concentration x of >=65% by weight, the mean molar mass {overscore (M of the polyoxymethylene glycols is, as a function of the formaldehyde concentration, equal to or less than the values given by equation I: ( M _ g / mol ) = 48 + 6.589 . 10 - 1 . ( x % by weight ) + 4.725 . 10 2 . ( x % by weight ) 2 - 3.434 . 10 - 3 . ( x % by weight ) 3 + 9.625 . 10 - 5 . ( x % by weight ) 4 - 1.172 . 10 6 . ( x % by weight ) 5 + 5.357 . 10 - 9 . ( x % by weight ) 6 ( I ) where: {overscore (M is the mean molar mass, and x is the total concentration of formaldehyde in the form of monomeric formaldehyde, methylene glycol and polyoxymethylene glycols in % by weight (total formaldehyde concentration).
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公开(公告)号：ES2212671T3
公开(公告)日：2004-07-16
申请号：ES99969405
申请日：1999-09-21
Applicant: BASF AG
Inventor： THEIS GERHARD , ADRIAN TILL , BESSLING BERND , HASSE HANS , VANSANT FRANS
Abstract: A process for the distillative recovery of high purity monoethylene glycol from the hydrolysis, product of ethylene oxide by pressure dewatering, preferably in a battery, vacuum dewatering and subsequent purifying distillation, wherein during the vacuum dewatering an aqueous stream is withdrawn which contains-monoethylene glycol in a concentration below 1% by weight, preferably below 0.1% by weight, medium boilers and low boilers. The withdrawn aqueous stream is, optionally after further workup, removed from the system.
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Patent Agency Ranking
公开(公告)号：ES2194518T3
公开(公告)日：2003-11-16
申请号：ES99952457
申请日：1999-09-21
Applicant: BASF AG
Inventor： ADRIAN TILL , BESSLING BERND , HASSE HANS , VANSANT FRANS , THEIS GERHARD
Abstract: A process for the distillative recovery of high purity monoethylene glycol from the hydrolysis product of ethylene oxide by pressure dewatering, vacuum dewatering and subsequent purifying distillation, which includes the pressure dewatering columns or at least the first pressure dewatering column of the battery (2, 3, 4) having a stripping section with at least one separating stage, preferably with from 2 to 10 separating stages, particularly preferably with from 3 to 6 stages, and a portion of the overhead stream of the pressure dewatering column(s) (2, 3, 4) having a stripping section being removed from the system.
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公开(公告)号：AU2002351846A1
公开(公告)日：2003-05-19
申请号：AU2002351846
申请日：2002-11-05
Applicant: BASF AG
Inventor： STROFER ECKHARD , HASSE HANS , SOHN MARTIN , SCHILLING KLEMENS
Abstract: In an aqueous formaldehyde solution comprising formaldehyde in the form of monomeric formaldehyde, methylene glycol and polyoxymethylene glycols in a total concentration x of >=65% by weight, the mean molar mass {overscore (M of the polyoxymethylene glycols is, as a function of the formaldehyde concentration, equal to or less than the values given by equation I: ( M _ g / mol ) = 48 + 6.589 . 10 - 1 . ( x % by weight ) + 4.725 . 10 2 . ( x % by weight ) 2 - 3.434 . 10 - 3 . ( x % by weight ) 3 + 9.625 . 10 - 5 . ( x % by weight ) 4 - 1.172 . 10 6 . ( x % by weight ) 5 + 5.357 . 10 - 9 . ( x % by weight ) 6 ( I ) where: {overscore (M is the mean molar mass, and x is the total concentration of formaldehyde in the form of monomeric formaldehyde, methylene glycol and polyoxymethylene glycols in % by weight (total formaldehyde concentration).
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公开(公告)号：BR0107822A
公开(公告)日：2002-10-29
申请号：BR0107822
申请日：2001-01-24
Applicant: BASF AG
Inventor： AUER HEINZ , BESSLING BERND , HAMMER HANS , HASSE HANS , SAUER FRIEDRICH , VICARI MAXIMILIAN , WAGNER GERHARD , ADRIAN TILL
Abstract: The invention relates to a process for obtaining anhydrous or substantially anhydrous formic acid in which, during the work-up, a compound of the general formula Iwhere the radicals R1 and R2 are alkyl, cycloalkyl, aryl or aralkyl groups, or R1 and R2 jointly, together with the N atom, form a heterocyclic 5- or 6-membered ring, and only one of the radicals is an aryl group, and where R3 is hydrogen or a C1-C4-alkyl group,is employed simultaneously as extractant for formic acid and as antifoam for a distillation process.
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公开(公告)号：NO20023513D0
公开(公告)日：2002-07-23
申请号：NO20023513
申请日：2002-07-23
Applicant: BASF AG
Inventor： AUER HEINZ , BESSLING BERND , HAMMER HANS , HASSE HANS , SAUER FRIEDRICH , VICARI MAXIMILIAN , WAGNER GERHARD , ADRIAN TILL
Abstract: The invention relates to a process for obtaining anhydrous or substantially anhydrous formic acid in which, during the work-up, a compound of the general formula Iwhere the radicals R1 and R2 are alkyl, cycloalkyl, aryl or aralkyl groups, or R1 and R2 jointly, together with the N atom, form a heterocyclic 5- or 6-membered ring, and only one of the radicals is an aryl group, and where R3 is hydrogen or a C1-C4-alkyl group,is employed simultaneously as extractant for formic acid and as antifoam for a distillation process.
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公开(公告)号：PL347580A1
公开(公告)日：2002-04-08
申请号：PL34758099
申请日：1999-09-21
Applicant: BASF AG
Inventor： THEIS GERHARD , ADRIAN TILL , BESSLING BERND , HASSE HANS , VANSANT FRANS
Abstract: A process for the distillative recovery of high purity monoethylene glycol from the hydrolysis, product of ethylene oxide by pressure dewatering, preferably in a battery, vacuum dewatering and subsequent purifying distillation, wherein during the vacuum dewatering an aqueous stream is withdrawn which contains-monoethylene glycol in a concentration below 1% by weight, preferably below 0.1% by weight, medium boilers and low boilers. The withdrawn aqueous stream is, optionally after further workup, removed from the system.
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