Process for the sulphonation of aromatic compounds with sulphur trioxide

US4859372A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Horst Behre · Odenthal, DE
• Heinz U. Blnak · Odenthal, DE
• Wilfried Kohler · Bensberg, DE
• Nikolaus Muller · Monheim, DE
• Peter Schnegg · Odenthal, DE

Key dates

• Filing date: Jan 6, 1989
• Grant date: Aug 22, 1989
• Expiry date: Jan 6, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07B45/02
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A new process for the preparation of aromatic sulphonic acids, in which the sulphonation of the aromatic compounds is carried out with sulphur trioxide in organic solvents in the presence of hydrogen halide.