公开(公告)号：FR1354607A

公开(公告)日：1964-03-06

申请号：FR932034

申请日：1963-04-19

Applicant: BASF AG

Inventor： KUERZINGER ALFRED ,  RIEGELBAUER GEORG ,  BOEHM OTTO

IPC: C07C51/31

公开(公告)号：CA904326A

公开(公告)日：1972-07-04

申请号：CA904326D

Applicant: BASF AG

Inventor： VOGES DIETER ,  KUERZINGER ALFRED ,  SCHOENLEBEN WILLIBALD ,  WINDERL SIEGFRIED ,  JESCHEK GERHARD ,  HOFFMANN HERWIG ,  SCHMIDT ERWIN

IPC: C07D309/30

公开(公告)号：GB1092603A

公开(公告)日：1967-11-29

申请号：GB1012365

申请日：1965-03-10

Applicant: BASF AG

Inventor： RIEGELBAUER GEORG ,  WEGERICH ANTON ,  KUERZINGER ALFRED ,  HAARER ERICH

IPC: C07C55/02 ,  C07C51/00 ,  C07C67/00

Abstract: Alkane dicarboxylic acids are prepared by a continuous process wherein cycloalkanols, cycloalkanones, cycloalkylamines, o - hydroxyalkane carboxylic acids having at least four carbon atoms, lactones of such acids and/or tetrahydrofurane are oxidized by intensely mixing said organic reactant with a large excess of 40 to 70% by weight nitric acid, the reaction is allowed to proceed at atmospheric or superatmospheric pressure and a temperature of 20 DEG to 100 DEG C., after a residence period of less than four minutes the mixture leaving the reaction zone is freed from nitrous oxides, the concentration of nitric acid is restored by evaporation of water to a level which is approximately that of the reaction zone nitric acid concentration, the alkane dicarboxylic acid is separated by a conventional method from a minor portion of the reaction mixture, the mother liquor is united with the remainder of the reaction mixture, fresh nitric acid, if desired, is added to the mixture thus obtained and this mixture is intensely mixed with fresh initial organic material and returned to the reaction zone.

公开(公告)号：FR1428374A

公开(公告)日：1966-02-11

申请号：FR8774

申请日：1965-03-11

Applicant: BASF AG

Inventor： RIEGELBAUER GEORG ,  WEGERICH ANTON ,  KUERZINGER ALFRED ,  HAARER ERICH

IPC: C07C55/02 ,  C07C51/00 ,  C07C67/00