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公开(公告)号:NO783298A
公开(公告)日:1979-04-03
申请号:NO783298
申请日:1978-09-28
Applicant: BASF AG
Inventor: HOHENSCHUTZ HEINZ , SCHMIDT JOHANNES E , KIEFER HANS
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公开(公告)号:FI88027C
公开(公告)日:1993-03-25
申请号:FI851658
申请日:1985-04-26
Applicant: BASF AG
Inventor: HOHENSCHUTZ HEINZ , SCHMIDT JOHANNES E , KIEFER HANS
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公开(公告)号:NO160509B
公开(公告)日:1989-01-16
申请号:NO851895
申请日:1985-05-13
Applicant: BASF AG
Inventor: HOHENSCHUTZ HEINZ , SCHMIDT JOHANNES E , KIEFER HANS
IPC: B01J31/00 , B01J31/02 , C07C53/02 , C07B61/00 , C07C27/00 , C07C27/02 , C07C51/00 , C07C51/09 , C07C67/00
Abstract: 1. A process for the preparation of anhydrous or substantially anhydrous formic acid by hydrolyzing methyl formate in the presence of a formamide and then obtaining the formic acid from the hydrolysis mixture by distillation, wherein the hydrolysis is carried out in the presence of 0.5-3 moles, per mole of methyl formate, of a water-soluble formamide of the formula I see diagramm : EP0161544,P5,F1 where R**1 and R**2 are each alkyl or together form an alkylene group, giving a 5-membered to 7-membered ring, with the proviso that the sum of the carbon atoms in R**1 and R**2 is 5 or 6 and that, in the case of an alkylene group, a carbon atom which is not directly bonded to the N atom can be replaced by an oxygen atom.
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公开(公告)号:FI865079A
公开(公告)日:1987-06-13
申请号:FI865079
申请日:1986-12-12
Applicant: BASF AG
Inventor: EICHHORN HANS-DIETER , MENGER VOLKMAR , REUTER PETER , SCHMIDT JOHANNES E , SCHWARZMANN MATTHIAS
IPC: C07C51/265 , C07D
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公开(公告)号:FI851658A0
公开(公告)日:1985-04-26
申请号:FI851658
申请日:1985-04-26
Applicant: BASF AG
Inventor: HOHENSCHUTZ HEINZ , SCHMIDT JOHANNES E , KIEFER HANS
IPC: C07C53/02 , B01J31/00 , B01J31/02 , C07B61/00 , C07C27/00 , C07C27/02 , C07C51/00 , C07C51/09 , C07C67/00 , C07C
Abstract: 1. A process for the preparation of anhydrous or substantially anhydrous formic acid by hydrolyzing methyl formate in the presence of a formamide and then obtaining the formic acid from the hydrolysis mixture by distillation, wherein the hydrolysis is carried out in the presence of 0.5-3 moles, per mole of methyl formate, of a water-soluble formamide of the formula I see diagramm : EP0161544,P5,F1 where R**1 and R**2 are each alkyl or together form an alkylene group, giving a 5-membered to 7-membered ring, with the proviso that the sum of the carbon atoms in R**1 and R**2 is 5 or 6 and that, in the case of an alkylene group, a carbon atom which is not directly bonded to the N atom can be replaced by an oxygen atom.
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公开(公告)号:NO148711C
公开(公告)日:1983-11-30
申请号:NO783298
申请日:1978-09-28
Applicant: BASF AG
Inventor: HOHENSCHUTZ HEINZ , SCHMIDT JOHANNES E , KIEFER HANS
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公开(公告)号:NO148068B
公开(公告)日:1983-04-25
申请号:NO763447
申请日:1976-10-08
Applicant: BASF AG
Inventor: HOHENSCHUTZ HEINZ , SCHMIDT JOHANNES E , KIEFER HANS
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公开(公告)号:CA1065889A
公开(公告)日:1979-11-06
申请号:CA262961
申请日:1976-10-07
Applicant: BASF AG
Inventor: HOHENSCHUTZ HEINZ , SCHMIDT JOHANNES E , KIEFER HANS
IPC: C07C53/00 , C07C51/00 , C07C51/48 , C07C53/02 , C07C53/08 , C07C53/122 , C07C57/07 , C07C67/00 , C07C57/04
Abstract: Carboxylic acids of the general formula I R1 - COOH where R1 is hydrogen, methyl, ethyl or vinyl, are isolated from their dilute aqueous solutions by extraction followed by distillation of the mixtures obtained, the extractant used being a secondary amide of the general formula II II where R2 and R3 are alkyl, cycloalkyl, aryl or aralkyl or conjointly are 1,4- or 1,5-alkylene, in each case of not more than 8 carbon atoms, with the proviso that the sum of the carbon atoms of R2 and R3 is from 7 to 14 and that only one of these radicals is aryl, and where R4 is one of the radicals R1.
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公开(公告)号:CA960696A
公开(公告)日:1975-01-07
申请号:CA117560
申请日:1971-07-06
Applicant: BASF AG
Inventor: HOHENSCHUTZ HEINZ , DIEM HANS , SCHMIDT JOHANNES E , MATTHIAS GUENTER , RAUCH KONRAD , ZINKE-ALLMANG HELMUT
IPC: C07C45/38
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公开(公告)号:LV5450A3
公开(公告)日:1994-03-10
申请号:LV930878
申请日:1993-06-30
Applicant: BASF AG
Inventor: HOHENSCHUTZ HEINZ , SCHMIDT JOHANNES E , KIEFER HANS
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