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公开(公告)号：DE502004011738D1
公开(公告)日：2010-11-18
申请号：DE502004011738
申请日：2004-03-03
Applicant: BASF SE
Inventor： STROEFER ECKHARD , LANG NEVEN , STEINBRENNER ULRICH , HASSE HANS , OTT MICHAEL , GRUETZNER THOMAS
IPC: C07C45/83 , C07C45/00 , C07C45/82 , C07C47/04 , C07C47/058
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公开(公告)号：AT483676T
公开(公告)日：2010-10-15
申请号：AT04716587
申请日：2004-03-03
Applicant: BASF SE
Inventor： STROEFER ECKHARD , LANG NEVEN , STEINBRENNER ULRICH , HASSE HANS , OTT MICHAEL , GRUETZNER THOMAS
IPC: C07C45/83 , C07C45/00 , C07C45/82 , C07C47/04 , C07C47/058
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.
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23.发明专利
公开(公告)号：DK1893660T3
公开(公告)日：2010-06-07
申请号：DK06777305
申请日：2006-06-12
Applicant: BASF SE
Inventor： STROEFER ECKHARD , HASSE HANS , BLAGOV SERGEJ
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公开(公告)号：AT459670T
公开(公告)日：2010-03-15
申请号：AT06777305
申请日：2006-06-12
Applicant: BASF SE
Inventor： STROEFER ECKHARD , HASSE HANS , BLAGOV SERGEJ
Abstract: Processes for preparing tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4) include feeding a reaction mixture of an aqueous formaldehyde solution and methanol into a reactive evaporator and separating into a first low boiler fraction and a first high boiler fraction, recycling the first high boiler fraction into the reactor, feeding the first low boiler fraction into a first distillation column and separating into a second low boiler fraction and a second high boiler fraction, recycling the second high boiler fraction into the reactive evaporator, feeding the second low boiler fraction into a second distillation column and separating into a third low boiler fraction and a third high boiler fraction, feeding the third high boiler fraction into a phase separation apparatus and separating into an aqueous phase and an organic phase, and feeding the organic phase into a third distillation column and separating into a low and high boiler fractions.
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公开(公告)号：DE50115031D1
公开(公告)日：2009-09-24
申请号：DE50115031
申请日：2001-01-12
Applicant: BASF SE
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 prepared by hydrolysis of methyl formate and is freed from water in the subsequent work-up. The process has the special feature that steam, which is employed for the hydrolysis of methyl formate and for heating a distillation column serving for work-up, is also used as stripping steam for waste-water stripping. The stripped waste water is produced during work-up.
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Patent Agency Ranking
公开(公告)号：PL1699776T3
公开(公告)日：2009-04-30
申请号：PL04804133
申请日：2004-12-21
Applicant: BASF SE
Inventor： SIEGERT MARKUS , LANG NEVEN , STROEFER ECKHARD , STAMMER ACHIM , FRIESE THORSTEN , HASSE HANS
IPC: C07D323/06
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公开(公告)号：DK1893667T3
公开(公告)日：2009-03-30
申请号：DK06841251
申请日：2006-06-12
Applicant: BASF SE
Inventor： STROEFER ECKHARD , HASSE HANS , BLAGOV SERGEJ
IPC: C08G65/00
Abstract: Preparing tri-/tetra oxymethylene glycol dimethylether (I) comprises e.g. distilling an aqueous formaldehyde solution and methanol in a reactor to form a reaction mixture containing polyoxy methylene glycol dimethylether (III); distilling the reaction mixture to form a high-boiling fraction (A2) containing e.g. (III); distilling (A2) to form e.g. a low-boiling fraction (A3) having e.g. (I); distilling (A3) to form a high-boiling fraction (A5) having e.g. (I); and distilling (A5) to form an organic phase containing (I). Preparing tri-/tetra oxymethylene glycol dimethylether through the conversion of formaldehyde with methanol and successive distillation of a reaction mixture, comprises: feeding an aqueous formaldehyde solution and methanol in a reactor to form the reaction mixture containing formaldehyde, water, methylene glycol, polyoxymethylene glycol, methanol, hemiformal, methylal and polyoxymethylene glycol dimethylether (III); feeding the reaction mixture into a first distillation column (5) and separating a low-boiling fraction (A1) containing formaldehyde, water, methylene glycol, methanol, methylal and polyoxy methylene glycoldimethylether and a high-boiling fraction (A2) containing formaldehyde, water, methanol, polyoxymethylene glycol, hemiformal and (III); feeding (A2) into a second distillation column (8) and separating a low-boiling fraction (A3) containing formaldehyde, water, methylene glycol, polyoxymethylene glycol, methanol, hemiformal, di-chloroethylene and (I) and a high-boiling containing polyoxymethylene glycol, high-boiling hemiformal and high-boiling polyoxymethylene glycol dimethylether; feeding (A3) and optionally feed-back stream containing formaldehyde, water, methylene glycol and polyoxymethylene glycol into a third distillation column (13) and separating a high volatile fraction (A4) containing formaldehyde, water, methanol, polyoxymethylene glycol, hemiformal and dioxymethylene glycol dimethylether and a high-boiling fraction (A5) containing formaldehyde, water, methylene glycol, polyoxymethylene glycol and (I); feeding (A5) in to a phase separator and separating an aqueous phase containing formaldehyde, water, methylene glycol and polyoxymethyleneglycol and an organic phase containing (I); feeding the organic phase into a fourth distillation column (18) and separating a low-boiling fraction (A6) containing formaldehyde, water, methylene glycol and polyoxymethylene glycol and a high-boiling fraction containing (I); and optionally feeding the aqueous phase in a fifth distillation column (24) and separating a low-boiling fraction (A7) containing formaldehyde, water, methylene glycol and polyoxymethylene glycol and a high-boiling fraction containing water.
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公开(公告)号：AT414072T
公开(公告)日：2008-11-15
申请号：AT04804133
申请日：2004-12-21
Applicant: BASF SE
Inventor： SIEGERT MARKUS , LANG NEVEN , STROEFER ECKHARD , STAMMER ACHIM , FRIESE THORSTEN , HASSE HANS
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：DE50113988D1
公开(公告)日：2008-07-03
申请号：DE50113988
申请日：2001-01-24
Applicant: BASF SE
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：DE50212277D1
公开(公告)日：2008-06-26
申请号：DE50212277
申请日：2002-11-05
Applicant: BASF SE
Inventor： STROEFER ECKHARD , 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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