公开(公告)号：MY126173A

公开(公告)日：2006-09-29

申请号：MYPI20023637

申请日：2002-09-28

Applicant: BASF AG

Inventor： HEYDRICH GUNNAR DR ,  AUST NICOLA CHRISTIANE DR ,  PUETTER HERMANN P DR ,  FISCHER ANDREAS DR ,  BOTZEM JOERG DR

IPC: C07C43/30 ,  C07B61/00 ,  C07C41/50 ,  C07C43/303 ,  C07C47/198

Abstract: A PROCESS IS DESCRIBED FOR PREPARING DIACETALS OF GLYOXAL BY REACTING FROM 40 TO 75BY WEIGHT AQUEOUS GLYOXAL WITH MONOHYDRIC ALCOHOLS IN THE PRESENCE OF AN ACID CATALYST, WHICH COMPRISES LEAVING A LIQUID MIXTURE WHICH, AT THE BEGINNING OF THE REACTION, COMPRISES ALCOHOL AND GLYOXAL IN A MOLAR RATIO OF AT LEAST 15:1 AND ALSO WATER IN A CONCENTRATION OF NOT MORE THAN 8BY WEIGHT IN CONTACT WITH THE ACID CATALYST UNTIL CONCENTRATION IN THE REACTION MIXTURE OF THE DIACETAL FORMED REACHES AT LEAST 70OF THE EQUILIBRIUM CONCENTRATION WITHOUT MORE THAN 5BY WEIGHT OF THE ALCOHOL USED HAVING ALREADY BEEN DISTILLED OFF.