Patent · US Expired

Method for producing acid chlorides

US6770783B1 · kind B1 · utility

1Cited by

5References

12Claims

0Family size

Assignee

BASF SE

Inventors

Ralph Busch · Olney, US
Heinz-Josef Kneuper · Mannheim, DE
Theodor Weber · Ludwigshafen, DE
Winfried Müller · Mannheim, DE
Armin Stamm · Mainz, DE
Jochem Henkelmann · Mannheim, DE

Key dates

Filing date	Mar 12, 2002
Grant date	Aug 3, 2004
Priority date	—
Expiry date	Jun 27, 2022

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C51/60
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to a method for producing acid chlorides by converting carboxylic acids with carbon oxychlorides or thionyl chloride in the presence of a catalyst adduct of an N,N-disubstituted formamide of general formula (I) and carbon oxychloride or thionyl chloride. In the formula, R1 and R2, independently from one another, mean C1- to C4-alkyl or R1 and R2 together mean a C4- or C5-alkylene chain. According to the inventive method, hydrogen chloride is added during and/or after the conversion.

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