Preparation of methane sulfonic acid

US6207025A · kind A · utility

Assignee

• BASF SE

Inventors

• Matthias Eiermann · Schifferstadt, DE
• Thomas Papkalla · Mannheim, DE

Key dates

• Filing date: Apr 8, 1999
• Grant date: Mar 27, 2001
• Expiry date: Apr 8, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C303/14
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for preparing methanesulfonic acid by irradiating a mixture comprising acetic acid, sulfur dioxide and oxygen with light, wherein the reaction mixture is irradiated with an average cumulative irradiance in the range from 240 to 320 mm of from 0.05 to 50 mmol quanta/cm.sup.2 h at the light entry area.