Process for preparing aliphatic straight-chain and beta-alkyl-branched carboxylic acids

US7138544B2 · kind B2 · utility

Assignee

• CELANESE CHEMICALS EUROPE GMBH · DE

Inventors

• Helmut Springer · Dinslaken, DE
• Frank Winsberg · Duisburg, DE

Key dates

• Filing date: Sep 28, 2005
• Grant date: Nov 21, 2006
• Expiry date: Sep 28, 2025

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C51/235
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for preparing aliphatic straight-chain and β-alkyl-branched carboxylic acids by catalytic oxidation of aldehydes by means of oxygen or oxygen-containing gas mixtures. Alkali metal carboxylates or alkaline earth metal carboxylates or a mixture thereof in an amount, calculated as alkali metal or alkaline earth metal, of from 1 mmol each to from 10 mmol each per mole of aldehyde used and also metals or compounds of metals of groups 5 to 11 of the Periodic Table of the Elements in amounts of not more than 5 ppm, based on aldehyde used, are present as catalyst.