Method for continuously producing diols from aldehydes by means of Raney cobalt catalysis

US12122737B2 · kind B2 · utility

Assignee

• OQ Chemicals GmbH · DE

Inventors

• Joachim Reimer · Wettingen, CH
• Kurt Schalapski · Oberhausen, DE
• Jan Henry Rahe · Herten, DE
• Jörg Arnold · Markdorf, DE
• Marcel MUSENBROCK · Düsseldorf, DE

Key dates

• Filing date: Jun 2, 2020
• Grant date: Oct 22, 2024
• Expiry date: Jul 24, 2041

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J23/75
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for continuous production of C4-C10 Diols from C3-C9 aldehydes comprising the process steps of: a) base-catalyzed addition of formaldehyde onto C3-C9 aldehydes to obtain the corresponding hydroxyaldehydes and b) subsequent hydrogenation of the hydroxyaldehydes to afford the corresponding diols, wherein the hydrogenation of the hydroxyaldehydes is performed continuously in the liquid phase over a Raney™ cobalt catalyst in the presence of hydrogen without workup of the reaction mixture from the process step a).