Patent · US Expired

Process for making carboxylic acid halides

US4543217A · kind A · utility

4Cited by

4References

4Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Heinz Erpenbach · Cologne, DE
Klaus Gehrmann · Lechenich, DE
Winfried Lork · Lechenich, DE
Peter Prinz · Ethel, US

Key dates

Filing date	Dec 15, 1983
Grant date	Sep 24, 1985
Priority date	—
Expiry date	Dec 15, 2003

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C51/58
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The disclosure relates to a process for making carboxylic acid halides by reacting an alkyl halide having 1 to 6 carbon atoms or aryl halide with carbon monoxide, optionally in admixture with up to 30 volume % hydrogen, under practically anhydrous conditions at temperatures of 350 to 575 K under pressures of 1 to 300 bars in the presence of a catalyst system containing at least one noble metal belonging to group VIII of the Periodic System of the elements or its compounds, iodine and/or its compounds and optionally an inert organic solvent. To this end, the disclosure provides for use to be made of a catalyst system which additionally contains a compound of the elements belonging to groups I to III of the Periodic System, and acetic acid.

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