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公开(公告)号：AT439339T
公开(公告)日：2009-08-15
申请号：AT01907445
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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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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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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Patent Agency Ranking
公开(公告)号：AT391737T
公开(公告)日：2008-04-15
申请号：AT02782447
申请日：2002-07-02
Applicant: BASF SE
Inventor： AUER HEINZ , BORCHERS DIRK , WETTLING THOMAS
IPC: C08F10/10 , C08L23/20 , C08F4/14 , C08F110/10
Abstract: A polyisobutene composition having a global maximum of the differential molecular weight distribution curve at a molecular weight M max of from 3 500 to 8 000 is described, which comprises at least one local maximum at a molecular weight of from 112 to 560. The isobutene oligomers present act as flow improvers and boiling assistants. They are added to higher molecular weight isobutene polymers, preferably before or in the course of a distillation, for removing unconverted isobutene and/or an inert diluent.
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公开(公告)号：DE50214483D1
公开(公告)日：2010-07-22
申请号：DE50214483
申请日：2002-04-10
Applicant: BASF SE
Inventor： WETTLING THOMAS , BORCHERS DIRK , AUER HEINZ
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公开(公告)号：AT470652T
公开(公告)日：2010-06-15
申请号：AT02766623
申请日：2002-04-10
Applicant: BASF SE
Inventor： WETTLING THOMAS , BORCHERS DIRK , AUER HEINZ
Abstract: A method for working up liquid reaction products from the cationic polymerisation of isobutene (mainly polyisobutene (PIB), unreacted isobutene and inert diluent) involves heating and flash evaporation to give a PIB-containing liquid phase and a gas phase containing most of the unreacted isobutene and at least 30% of the inert diluent.
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公开(公告)号：DE50212073D1
公开(公告)日：2008-05-21
申请号：DE50212073
申请日：2002-07-02
Applicant: BASF SE
Inventor： AUER HEINZ , BORCHERS DIRK , WETTLING THOMAS
IPC: C08F10/10 , C08L23/20 , C08F4/14 , C08F110/10
Abstract: A polyisobutene composition having a global maximum of the differential molecular weight distribution curve at a molecular weight M max of from 3 500 to 8 000 is described, which comprises at least one local maximum at a molecular weight of from 112 to 560. The isobutene oligomers present act as flow improvers and boiling assistants. They are added to higher molecular weight isobutene polymers, preferably before or in the course of a distillation, for removing unconverted isobutene and/or an inert diluent.
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公开(公告)号：AT396167T
公开(公告)日：2008-06-15
申请号：AT01946840
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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