公开(公告)号：DE50004300D1

公开(公告)日：2003-12-11

申请号：DE50004300

申请日：2000-06-06

Applicant: BASF AG

Inventor： STROEFER DR ,  SCHOLL DR ,  HASSE PROF DR

IPC: B01D1/22 ,  C07B63/00 ,  C07C29/80 ,  C07C41/56 ,  C07C43/303 ,  C07C45/82 ,  C07C47/04 ,  C07C47/058

Abstract: A method for reacting a solution containing a mixture of at least two chemicals in chemical equilibrium with other chemical(s) involves: (a) separating the solution into at least two fractions, enriched in the various compounds relative to the equilibrium concentrations; and (b) reacting one fraction with the other reactant(s) before equilibrium is completely restored. A method for reacting a solution containing a mixture of at least two chemicals in chemical equilibrium with other chemical(s) involves: (1) separating the solution into at least two fractions, enriched in the various compounds relative to the equilibrium concentrations; and (2) reacting one fraction with the other reactant(s) before equilibrium is completely restored. Excluded is the reaction of a formaldehyde solution, containing polyoxymethylene glycols and optionally monomeric formaldehyde and/or methylene glycol, with aniline in presence of an acid catalyst.

公开(公告)号：DE59802407D1

公开(公告)日：2002-01-31

申请号：DE59802407

申请日：1998-07-13

Applicant: BASF AG

Inventor： AUER HEINZ ,  KRUEGER SIEGFRIED ,  SCHOLL DR ,  WEBER THEODOR ,  MELDER DR

IPC: B01D3/00 ,  B01D3/14 ,  B01D3/32 ,  C07C67/54 ,  C07C69/28 ,  C07C69/675

Abstract: Recovery of neopentyl hydroxypivalate (I) from a mixture containing (I), products (II) of lower boiling point, products (III) of higher boiling point and inorganic salts (IV) is carried out in 2 separation stages. In stage (1), the mixture is fed to a wiped film evaporator; (III) and (IV) are discharged from the sump; and a vapor stream of (I), (II) and (III) is discharged via the top to a heat transfer unit, where it is condensed. In stage (2), the condensate is fed into a rectifying column with a second evaporator and heat transfer; a vapor stream of (II) is discharged at the top, condensed and optionally partly recycled as reflux and partly discharged; a vapor stream of (I) is discharged at the side and condensed; and a stream of (I) and (III) is discharged from the sump and (partly) passed to the second evaporator, the vapor from this evaporator being (partly) recycled to the lower zone of the column. Also claimed is the apparatus used.