公开(公告)号：DE19617210A1

公开(公告)日：1997-11-06

申请号：DE19617210

申请日：1996-04-30

Applicant: BASF AG

Inventor： KAIBEL GERD DR ,  STROEZEL MANFRED ,  RHEUDE UDO DR

IPC: B01D3/14 ,  B01D3/16 ,  B01D3/32 ,  B01J19/32

Abstract: A partitioned column for separating a multi-component mixture into three or more fractions comprises at least one removable partition wall. Also claimed is a process for separating a multi-component mixture into three or more fractions using the above column.

公开(公告)号：DE19547450A1

公开(公告)日：1997-06-26

申请号：DE19547450

申请日：1995-12-19

Applicant: BASF AG

Inventor： KAIBEL GERD DR ,  STROEZEL MANFRED

IPC: B01D3/14 ,  B01D3/42 ,  G05D11/08

公开(公告)号：DE4209631A1

公开(公告)日：1993-09-30

申请号：DE4209631

申请日：1992-03-25

Applicant: BASF AG

Inventor： BROECKER FRANZ JOSEF DR ,  STROEZEL MANFRED ,  ARNOLD LOTHAR DR ,  HORN HANS CHRISTOPH DR ,  BITTLER KNUT DR

IPC: B01J23/44 ,  B01J35/02 ,  B01J35/04 ,  B01J37/00 ,  B01J37/02 ,  C07B61/00 ,  C07C5/02 ,  C10G45/04 ,  C10G45/40 ,  F01N3/28 ,  B01J37/08

公开(公告)号：DE3260082D1

公开(公告)日：1984-05-03

申请号：DE3260082

申请日：1982-03-31

Applicant: BASF AG

Inventor： JANITSCHKE LOTHAR DR ,  HOFFMANN WERNER DR ,  ARNOLD LOTHAR DR ,  STROEZEL MANFRED ,  SCHEIPER HANS-JUERGEN

IPC: C07C45/00 ,  C07C45/74 ,  C07C49/203 ,  C07C67/00

Abstract: An improved process for the preparation of unsaturated ketones of the general formula I (I) where R1 is -CH3, and R2 and R3 are different and each is H or -CH3, by reacting an aldehyde of the general formula II (II) with a molar excess of acetone or methyl ethyl ketone at an elevated temperature in the presence of an aqueous alkali metal hydroxide solution, wherein (a) all the reactants are mixed thoroughly, (b) the temperature is kept at from 10 to 120 DEG C. above the boiling point of the lowest-boiling component and (c) the pressure is kept at from p to 100 bar, where p is the vapor pressure of the mixture at the reaction temperature. The products methylpseudoionone, dimethylpseudoionone, pseudoirone, methylpseudoirone and dimethylpseudoirone are useful scents and scent intermediates. In addition, pseudoionone is an important intermediate for the industrial preparation of vitamin A, and 6-methyl-hepta-3,5-dien-2-one is a sought-after aromatic.