Process for preparing carboxylic acids or salts thereof from hydrocarbons

US11008275B2 · kind B2 · utility

Assignee

• Evonik Operations GmbH · DE

Inventors

• Peter Kucmierczyk · Herne, DE
• Robert Franke · Marl, DE
• Dirk Fridag · Haltern am See, DE
• Johannes Knossalla · Gahlen, DE
• Marc Schäpertöns · Recklinghausen, DE
• Frederik Gluth · Mülheim an der Ruhr, DE

Key dates

• Filing date: Jun 5, 2020
• Grant date: May 18, 2021
• Expiry date: Jun 5, 2040

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D2311/2669
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to a process for preparing carboxylic acids or salts thereof by hydrolysis or saponification of an ester, which is obtained by alkoxycarbonylation of a C2 to C20 hydrocarbon having at least one multiple bond, preferably having at least one olefinic double bond, in which the homogeneous catalyst system used is separated from the product mixture by means of membrane separation. In a development of the present invention, the ester thus formed is converted into another ester by transesterification and then hydrolyzed or saponified.