Patent · US Expired

Purification of carboxylic esters which contain aldehydes, acetals and/or unsaturated compounds

US4946029A · kind A · utility

6Cited by

8References

4Claims

0Family size

Assignee

BASF SE

Inventors

Gerhard Frank · Hirschberg, DE
Hubert Lendle · Ludwigshafen, DE
Wilfried Seyfert · Bad Dürkheim, DE
Peter Stops · Altrip, DE

Key dates

Filing date	Feb 24, 1989
Grant date	Aug 7, 1990
Priority date	—
Expiry date	Feb 24, 2009

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C67/60
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Carboxylic esters obtained by reacting olefinically unsaturated compounds with carbon monoxide and alcohols and containing aldehydes, acetals and/or unsaturated compounds are purified by PA1 (a) treating the carboxylic ester which contains an aldehyde, acetal or unsaturated compound in a first stage at from 20.degree. to 200.degree. C. with a strongly acidic agent and PA1 (b) hydrogenating the mixture thus treated in a second stage at from 50.degree. to 200.degree. C. under a pressure of from 1 to 50 bar in the presence of one or more metals of subgroup VIII of the periodic table and PA1 (c) removing low and high boilers from the hydrogenated mixture obtained in stage b by distillation and obtaining a pure carboxylic ester.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.