公开(公告)号：CZ284069B6

公开(公告)日：1998-08-12

申请号：CS30490

申请日：1990-01-22

Applicant: BASF AG

Inventor： KAIBEL GERD DR ING ,  SCHLOEMER KARL DR ,  MAYER HANS HORST

IPC: B01D3/14 ,  C07C7/04 ,  C07C29/80 ,  C07C35/08 ,  C07C35/20 ,  C07C45/82

Abstract: Process for the separation by distillation of small quantities of a middle-boiling fraction from a liquid mixture by means of a distillation column (main column), comprising a rectification and a stripping component, where the liquid mixture contains relatively large amounts of higher- and lower-boiling constituents, and the rectification component being connected to the upper end and the stripping component to the lower end of a second distillation column (side column), and the middle-boiling fraction being removed in vapour or liquid form from its middle region, the concentration of the middle-boiling fraction in the liquid mixture being less than 2%, preferably less than 0.1%, and the amount of vapour introduced into the side column at its lower end from the main column being 1 to 20%, preferably 3 to 10%, relative to the amount of vapour in the main column at the relevant point.

公开(公告)号：CZ9000304A3

公开(公告)日：1998-05-13

申请号：CS30490

申请日：1990-01-22

Applicant: BASF AG

Inventor： KAIBEL GERD DR ING ,  SCHLOEMER KARL DR ,  MAYER HANS HORST

IPC: B01D3/14 ,  C07C7/04 ,  C07C29/80 ,  C07C35/08 ,  C07C35/20 ,  C07C45/82

CPC classification number: C07C45/82 ,  B01D3/146 ,  C07C29/80 ,  C07C2601/14 ,  Y10S203/09 ,  Y10S203/20 ,  C07C35/08 ,  C07C49/403

公开(公告)号：CZ30490A3

公开(公告)日：1998-05-13

申请号：CS30490

申请日：1990-01-22

Applicant: BASF AG

Inventor： KAIBEL GERD DR ING ,  SCHLOEMER KARL DR ,  MAYER HANS HORST

IPC: B01D3/14 ,  C07C7/04 ,  C07C29/80 ,  C07C35/08 ,  C07C35/20 ,  C07C45/82

Abstract: Process for the separation by distillation of small quantities of a middle-boiling fraction from a liquid mixture by means of a distillation column (main column), comprising a rectification and a stripping component, where the liquid mixture contains relatively large amounts of higher- and lower-boiling constituents, and the rectification component being connected to the upper end and the stripping component to the lower end of a second distillation column (side column), and the middle-boiling fraction being removed in vapour or liquid form from its middle region, the concentration of the middle-boiling fraction in the liquid mixture being less than 2%, preferably less than 0.1%, and the amount of vapour introduced into the side column at its lower end from the main column being 1 to 20%, preferably 3 to 10%, relative to the amount of vapour in the main column at the relevant point.