公开(公告)号：DE10326403A1

公开(公告)日：2004-12-30

申请号：DE10326403

申请日：2003-06-12

Applicant: BASF AG

Inventor： KLAS KARIN ,  BECKER HEIKE ,  VOGELSANG REGINA ,  HAUK ALEXANDER ,  SIEGERT MARKUS ,  HENKELMANN JOCHEM

IPC: C07C29/82 ,  C07C41/08 ,  C07C41/42 ,  C07C27/28 ,  C07C29/80

Abstract: Process for distillatively separating a mixture containing a vinyl ether of the general formula (I) R1—O—CH═CH2  (I) and alcohol of the general formula (II) R2—OH  (II) in which R1 and R2 are each independently a saturated or unsaturated, aliphatic or cycloaliphatic radical having from 2 to 10 carbon atoms, and in which the alcohol (II) has a boiling point which is at least 1° C. higher, measured at or extrapolated to 0.1 MPa abs, than the vinyl ether (I), by a) passing the mixture into a first distillation column and withdrawing, as a top product, an azeotrope containing vinyl ether (I) and alcohol (II) and, as a bottom product, a stream enriched with the alcohol (II); b) passing the azeotrope containing vinyl ether (I) and alcohol (II) from the first distillation column into a second distillation column which is operated at a pressure which is from 0.01 to 3 MPa higher compared to the first distillation column, and withdrawing, as a bottom product or gaseous sidestream in the stripping section, the vinyl ether (I) and, as a top product, an azeotrope containing vinyl ether (I) and alcohol (II); and c) recycling the azeotrope containing vinyl ether (I) and alcohol (II) from the second distillation column into the first distillation column.