Method of producing catechol and hydroquinone

US5026925A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Karl-Heinz Drauz · Alzenau, DE
• Axel Kleeman · Hanau, DE
• Gunter Prescher · Hanau, DE
• Gebhard Ritter · Ingelheim am Rhein, DE

Key dates

• Filing date: Jan 27, 1987
• Grant date: Jun 25, 1991
• Expiry date: Jan 27, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C37/60
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The nuclear hydroxylation of phenol can be carried out in an industrially very simple manner and with at least the yields obtained with the known methods as well as with very good selectivities by means of using aqueous hydrogen peroxide with the simultaneous addition of sulfur dioxide or selenium dioxide as catalyst.