Patent · US Expired

Process for working up distillation residues from the hydroformylation of propene

US4190731A · kind A · utility

3Cited by

3References

8Claims

0Family size

Assignee

Chemische Werke Huels Aktiengesellschaft · US

Inventors

Rudolph Nehring · Marl, DE
Manfred zur Hausen · Marl, DE
Werner Neumann · Ludwigshafen, DE

Key dates

Filing date	Sep 7, 1978
Grant date	Feb 26, 1980
Priority date	—
Expiry date	Sep 7, 1998

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C45/50
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The oxo process wherein propene is hydroformylated and then distilled to separate n-butyraldehyde, iso-butyraldehyde, n-butanol, iso-butanol, n-butyl formate, iso-butyl formate and distillation residues having an acid number of about 80 to 130 is improved by adding to the distillation residues molar to twice molar amounts, relative to the acid content, of n-butanol, isobutanol or mixtures thereof, carrying out an esterification in the presence of catalytically active amounts of sulphonic acids at temperatures from about 50.degree. to 200.degree. C., separating off the water of reaction, distilling the esterification reaction product and hydrogenating the distillate thereof.

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