中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

23 records (took 0.036 seconds)

    PREPARATION OF FORMIC ACID
    1.
    发明专利
    PREPARATION OF FORMIC ACID 未知

    公开(公告)号：CA1239424A

    公开(公告)日：1988-07-19

    申请号：CA480861

    申请日：1985-05-06

    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 ,  C07C51/377

    Abstract: Anhydrous or substantially anhydrous formic acid is prepared by hydrolyzing methyl formate in the presence of a formamide and then obtaining the formic acid from the hydrolysis mixture by distillation, by a method in which 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 general formula I where R1 and R2 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 R1 and R2 is 5 or 6 and, 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.

    4.
    发明专利
    未知

    公开(公告)号：FI88027B

    公开(公告)日：1992-12-15

    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

    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.

    5.
    发明专利
    未知

    公开(公告)号：FI851658L

    公开(公告)日：1985-11-15

    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.

    9.
    发明专利
    未知

    公开(公告)号：NO851895L

    公开(公告)日：1985-11-15

    申请号：NO851895

    申请日：1985-05-13

    Applicant: BASF AG

    Inventor： HOHENSCHUTZ HEINZ ,  SCHMIDT JOHANNES E ,  KIEFER HANS

    IPC: B01J31/00 ,  C07C53/02 ,  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.

Patent Agency Ranking