公开(公告)号：DE2914671A1

公开(公告)日：1980-10-23

申请号：DE2914671

申请日：1979-04-11

Applicant: BASF AG

Inventor： WOLF DIETER DIPL ING DR ,  SCHMIDT RUDOLF DIPL ING DR ,  BLOCK ULRICH DIPL ING DR ,  SCHOENMAKERS HARTMUT DIPL PHYS ,  BOTT KASPAR DIPL CHEM DR ,  KAIBEL GERN DIPL ING

IPC: C07C53/02 ,  C07C27/02 ,  C07C51/00 ,  C07C51/09 ,  C07C51/42 ,  C07C51/44 ,  C07C51/48 ,  C07C67/00

Abstract: Anhydrous or substantially anhydrous formic acid is obtained by hydrolysis of methyl formate, in a process wherein (a) methyl formate is hydrolyzed, (b) the methanol and excess methyl formate are distilled from the hydrolysis mixture obtained, (c) the bottom product of distillation (b), consisting of formic acid and water, is extracted, in a liquid-liquid extraction, with an extractant which in the main takes up the formic acid, (d) the resulting extract phase, consisting of formic acid, the extractant and a part of the water, is subjected to distillation, (e) the top product obtained from this distillation and consisting of all or part of the water introduced into the distillation, and part of the formic acid, is recycled, as vapor, into the lower part of the distillation column of stage (b), (f) the bottom product of distillation stage (d), consisting of the extractant, with or without part of the water, and the greater part of the formic acid, is separated by distillation into anhydrous or substantially anhydrous formic acid and the extractant, and (g) the extractant leaving stage (f) is recycled to the process.

公开(公告)号：DE2810644A1

公开(公告)日：1979-09-13

申请号：DE2810644

申请日：1978-03-11

Applicant: BASF AG

Inventor： ELLIEHAUSEN HEINRICH DIPL CHEM ,  HOHENSCHUTZ HEINZ DIPL CHEM DR ,  STROHMEYER MAX DIPL CHEM DR ,  WOLF DIETER DIPL ING DR ,  ZEHNER PETER DIPL ING DR

IPC: C07C27/22 ,  B01J10/00 ,  B01J19/24 ,  C07C27/00 ,  C07C29/156 ,  C07C29/158 ,  C07C45/50 ,  C07C67/00 ,  C07C27/24 ,  C07C31/02 ,  C07C47/02

公开(公告)号：DE2736872A1

公开(公告)日：1979-02-22

申请号：DE2736872

申请日：1977-08-16

Applicant: BASF AG

Inventor： RAPP GUENTHER DIPL CHEM DR ,  THOMAS ERWIN ,  WOLF DIETER DIPL ING DR ,  KUERTEN HERIBERT DIPL ING DR ,  ZEHNER PETER DIPL ING DR

IPC: B01J10/00 ,  B01J19/24 ,  B01J19/26 ,  B01J23/00 ,  C01B21/14

Abstract: Hydroxylammonium salts are manufactured by a process comprising the catalytic reduction of nitric oxide with hydrogen in a dilute aqueous solution of a mineral acid in the presence of a suspended platinum catalyst at an elevated temperature, wherein the reaction mixture is recycled and the gas mixture, containing nitric oxide and hydrogen, present in the gas space above the reaction zone, is introduced, by means of one or more downwardly directed jets of liquid, consisting of the recycled reaction mixture and issuing from a nozzle orifice, into one or more circulation zones which are present in the reaction zone, are open at both sides, extend in the direction of the entering jet of liquid and are completely covered by the reaction mixture, the reaction mixture leaving the bottom of the circulation zone and containing unconverted gases is deflected, passed upwards in the annular zone externally surrounding the circulation zone, and at the same time reaction mixture of low gas content is recycled from a separation zone located under the reaction zone.