公开(公告)号：NO20024707D0

公开(公告)日：2002-10-01

申请号：NO20024707

申请日：2002-10-01

Applicant: BASF AG

Inventor： HEYDRICH GUNNAR ,  AUST NICOLA CHRISTIANE ,  PUETTER HERMANN ,  FISCHER ANDREAS ,  BOTZEN JOERG

IPC: C07B61/00 ,  C07C41/50 ,  C07C43/303 ,  C07C47/198 ,  C07C

Abstract: The production of diacetals (I) of glyoxal (II) from aqueous glyoxal and monohydric alcohols (III) with an acid catalyst (IV) involves leaving a mixture of (III) and (II) in contact with (IV) until the content of (I) is at least 70% of the equilibrium concentration. production of diacetals (I) of glyoxal (II) from 40-75 wt% aqueous glyoxal and monohydric alcohols (III) with acid catalyst (IV) involves leaving a mixture of (III) and (II) (mol ratio = at least 15:1) and not more than 8 wt% water in contact with (IV) until the content of (I) is at least 70% of the equilibrium concentration (without distilling off more than 5 wt% of the alcohol).

公开(公告)号：NO20024707L

公开(公告)日：2003-04-07

申请号：NO20024707

申请日：2002-10-01

Applicant: BASF AG

Inventor： HEYDRICH GUNNAR ,  AUST NICOLA CHRISTIANE ,  PUETTER HERMANN ,  FISCHER ANDREAS ,  BOTZEN JOERG

IPC: C07B61/00 ,  C07C41/50 ,  C07C43/303 ,  C07C47/198 ,  C07C41/56

Abstract: The production of diacetals (I) of glyoxal (II) from aqueous glyoxal and monohydric alcohols (III) with an acid catalyst (IV) involves leaving a mixture of (III) and (II) in contact with (IV) until the content of (I) is at least 70% of the equilibrium concentration. production of diacetals (I) of glyoxal (II) from 40-75 wt% aqueous glyoxal and monohydric alcohols (III) with acid catalyst (IV) involves leaving a mixture of (III) and (II) (mol ratio = at least 15:1) and not more than 8 wt% water in contact with (IV) until the content of (I) is at least 70% of the equilibrium concentration (without distilling off more than 5 wt% of the alcohol).

公开(公告)号：NO20024707A

公开(公告)日：2003-04-07

申请号：NO20024707

申请日：2002-10-01

Applicant: BASF AG

Inventor： HEYDRICH GUNNAR ,  AUST NICOLA CHRISTIANE ,  PUETTER HERMANN ,  FISCHER ANDREAS ,  BOTZEN JOERG

IPC: C07B61/00 ,  C07C41/50 ,  C07C43/303 ,  C07C47/198 ,  C07C41/56

CPC classification number: C07C41/56 ,  C07C43/303 ,  C07C47/198