Process for preparing fluorosulfonic acid having low contents of low-boiling compounds

US6673329B2 · kind B2 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Andreas Bulan · Langenfeld, DE
• Michael Batz · Leichlingen, DE
• Dieter Heinz · Heppenheim, DE
• Kasper Hallenberger · Leverkusen, DE

Key dates

• Filing date: Jun 20, 2001
• Grant date: Jan 6, 2004
• Expiry date: May 25, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B17/463
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to a novel process for preparing fluorosulfonic acid having low contents of low-boiling compounds in which hydrogen fluoride and sulfur trioxide are combined in stoichiometric amounts in a reaction vessel or by means of a reaction nozzle, the hot, gaseous fluorosulfonic acid that is formed is fed directly into a distillation column, and the fluorosulfonic acid is taken off at the bottom of the column or in the stripping section of the distillation column.