公开(公告)号：DE50006643D1

公开(公告)日：2004-07-08

申请号：DE50006643

申请日：2000-03-30

Applicant: BASF AG

Inventor： TRAGUT DR ,  KAIBEL DR

IPC: B01D3/14 ,  B01D3/16 ,  C07B63/00 ,  C07C29/80 ,  C07C29/84 ,  C07C31/20

Abstract: A distillation process and assembly separate a mixture consisting of a substance with a high melting point (m.p.) and a seco substance or mixture of substances with a lower m.p. A distillation process and assembly separate a mixture consisting of a substance (2) with a high melting point (m.p.) and a second substance or mixture of substances with a lower m.p. The starting mixture incorporating the substance (1) of low boiling point (b.p.) is released into the distillation apparatus, which consists of a partitioned column or of a thermally-coupled distillation column. The head of the distillation apparatus is positioned above the tapping outlet for the higher m.p. substance (2). Part of the condenser surface is of lower temperature than that of the higher m.p. substance. The light substance (1) in th head is strongly enriched, preventing separation of the higher m.p. substance (2) on the condenser.