公开(公告)号：CA1213611A

公开(公告)日：1986-11-04

申请号：CA396091

申请日：1982-02-11

Applicant: BASF AG

Inventor： BOTT KASPAR ,  KAIBEL GERD ,  HOFFMANN HERWIG ,  IRNICH RUDOLF ,  KRATZER OTTO

IPC: C07C231/02 ,  C07C20060101 ,  C07C67/00 ,  C07C231/00 ,  C07C233/03 ,  C07C102/06 ,  C07C103/127

Abstract: Formamide is prepared continuously from methyl formate and ammonia, pure methanol being recovered, by a process wherein a) the reaction of methyl formate and ammonia is carried out predominantly in the liquid phase in the upper region of a reaction column R having a total of from 15 to 30 theoretical plates, b) the methanol formed in this reaction is removed, together with small amounts of formamide, from the column or the evaporator in vaporous form at the level of plates 1 - 5 (counted from the bottom), c) the formamide is removed from this methanol/ formamide mixture, together with small amounts of methanol, in a distillation column Dl and recycled to R, and d) the small amounts of methanol contained in the bottom product from R, which substantially consists of formamide and in this column should be at from 110 to 130.degree.C, are separated off in a distillation column D2.

公开(公告)号：CA1211736A

公开(公告)日：1986-09-23

申请号：CA455386

申请日：1984-05-29

Applicant: BASF AG

Inventor： BOTT KASPAR ,  KAIBEL GERD ,  HARTMANN HORST ,  IRNICH RUDOLF ,  BUELOW HORST

IPC: C07C53/02 ,  C07C51/00 ,  C07C51/44 ,  C07C67/00

Abstract: Formic acid is recovered, by distillation, from its mixtures with solvents of the general formula I where R1 is hydrogen, methyl, ethyl or vinyl and R2 and R3 are each alkyl, cycloalkyl, aryl or aralkyl, or R2 and R3 together form a 1,4- or 1,5-alkylene group of 1 to 8 carbon atoms, with the provisos that the sum of the number of carbon atoms in R2 and R3 is 7 to 14 and that only one of these radicals is aryl, by a method in which the distillation is carried out in the presence of a carboxamide II which has a boiling point lower than that of the solvent I.

公开(公告)号：NO842152L

公开(公告)日：1984-12-03

申请号：NO842152

申请日：1984-05-30

Applicant: BASF AG

Inventor： BOTT KASPAR ,  KAIBEL GERD ,  HARTMANN HORST ,  IRNICH RUDOLF ,  BUELOW HORST

IPC: C07C53/02 ,  C07C51/00 ,  C07C51/44 ,  C07C67/00 ,  C07C

公开(公告)号：CA1135281A

公开(公告)日：1982-11-09

申请号：CA341669

申请日：1979-12-11

Applicant: BASF AG

Inventor： BOTT KASPAR ,  KAIBEL GERD ,  HOFFMANN HERWIG ,  KRATZER OTTO ,  IRNICH RUDOLF

IPC: C07C53/02 ,  C07C51/00 ,  C07C51/09 ,  C07C51/44 ,  C07C51/48 ,  C07C67/00

Abstract: A process for the production of anhydrous or substantially anhydrous formic acid by hydrolysis of methyl formate which is carried out in a column and in which a) the hydrolysis 15 carried out in the middle section of the column, with water and methyl formate in countercurrent, b) the resulting formic acid is extracted, in the lower section of the column, by means of a carboxylic acid amide of the general formula I I where Rl and R2 are alkyl, which may also be linked to form a 5-membered or 6-membered ring, or are cyclohexyl, and R3 is hydrogen or Cl-C4-alkyl, the sum of the carbon atoms in radicals R1, R2 and R3 being from 7 to 14, the carboxylic acid amide being fed into the lower end of the middle section of the column, c) the extract phase, consisting in the main of formic acid and the carboxylic acid amide, is distillatively dehydrated, or substantially dehydrated, in the lower section of the column, d) the methanol and uncoverted methyl formate are removed by fractional distillation in the upper section of the column and e) the pure formic acid or concentrated aqueous formic acid is distilled from the anhydrous or substantially anhydrous extract phase in a second column, leaving the carboxylic acid amide.

公开(公告)号：BE635221R

公开(公告)日：1964-01-22

申请号：BE635221

申请日：1963-07-22

Applicant: BASF AG

Inventor： IRNICH RUDOLF

IPC: C07D201/04 ,  C07D