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.

公开(公告)号：AT210626T

公开(公告)日：2001-12-15

申请号：AT98112986

申请日：1998-07-13

Applicant: BASF AG

Inventor： AUER HEINZ ,  KRUEGER SIEGFRIED ,  SCHOLL STEPHAN DR ,  WEBER THEODOR ,  MELDER JOHANN-PETER 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.

公开(公告)号：HU0100478A2

公开(公告)日：2001-06-28

申请号：HU0100478

申请日：1998-11-21

Applicant: BASF AG

Inventor： HENKELMANN JOCHEM ,  STAMM ARMIN ,  WEBER THEODOR ,  WEYER HANS-JUERGEN

IPC: C07C51/00 ,  C07C51/58 ,  C07C53/50

Abstract: The present invention provides process for the preparation of chlorocarbonyl chlorides of the formula IwhereR1 is for example hydrogen or C1- to C20-alkyl andY is for example a saturated or mono- or polyolefinically unsaturated C2-C8-alkylene chain,by reacting lactones with a chlorinating agent in the presence of a urea compound.

公开(公告)号：DE3432577A1

公开(公告)日：1986-03-13

申请号：DE3432577

申请日：1984-09-05

Applicant: BASF AG

Inventor： MERGER FRANZ DR ,  HETTINGER PETER DR ,  WEBER THEODOR ,  BOETTGER GUENTER DR ,  KOERNIG WOLFGANG DR

IPC: C07B61/00 ,  B01J23/02 ,  C07C67/44 ,  C07C67/58 ,  C07C69/675

Abstract: Neopentyl glycol hydroxypivalate is isolated from a reaction mixture obtained from a Tishchenko reaction of hydroxypivalaldehyde in the presence of calcium hydroxide, barium hydroxide or strontium hydroxide, by adding acid, removing the salts formed by adjusting the water content in the reaction mixture to 20-60% and extracting the salts at above 50 DEG C. and working up the residual mixture by distillation.

公开(公告)号：DE2322709A1

公开(公告)日：1974-11-28

申请号：DE2322709

申请日：1973-05-05

Applicant: BASF AG

Inventor： WOLF DIETER DR ,  BENDER EBERHARD DR ,  WEBER THEODOR

IPC: C07D319/12 ,  C07D15/10

Abstract: Dioxane is produced by reaction of ethylene glycol or a polyethylene glycol using an acid catalyst. The reaction product containing dioxane, water and byproducts is subjected to extractive distillation with a high-boiling agent which is miscible with water.