公开(公告)号：CH623567A5

公开(公告)日：1981-06-15

申请号：CH219076

申请日：1976-02-23

Applicant: BASF AG

Inventor： RAPP CHEM GUENTHER DR ,  FUCHS CHEM HUGO DR ,  THOMAS ERWIN

IPC: C07D223/08 ,  C07C67/00 ,  C07C239/00 ,  C07C251/46 ,  C07D201/04 ,  C07D223/10 ,  C07C131/04

Abstract: An improved process for the manufacture of cyclohexanone oxime by reacting cyclohexanone with an aqueous hydroxylammonium-ammonium sulfate solution at temperatures above the melting point of cyclohexanone oxime by the countercurrent process, the improvement consisting in that the reaction is carried out in the absence of solvents and neutralizing and/or buffer salts at pHs of up to 0.5 until equilibrium is reached, the oximes resulting during the reaction being separated from the aqueous phase and the aqueous phase being extracted with cyclohexanone and then subjected to steam distillation.