Process for the preparation of optionally substituted benzaldehyde dialkyl acetals

US4318783A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Hans-Rolf Buhmann
• Dieter Arlt · Cologne, DE
• Manfred Jautelat · Burscheid, DE

Key dates

• Filing date: Nov 14, 1979
• Grant date: Mar 9, 1982
• Expiry date: Nov 14, 1999

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/582
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

An electrochemical oxidation process of optionally substituted toluene dissolved in an alcohol in the presence of a conducting salt is described wherein the electrochemical oxidation is carried out at a current density of 0.1 to 50 A/dm.sup.2 using oxidation-resistant anodes. According to the disclosure, the reaction product can be distillatively worked up to obtain secondary products which can be recycled to electrochemical oxidation optionally after treatment of at least some of the secondary products with hydrogen in the presence of a catalyst.