Process for regenerating waste sulfuric acid

US4194952A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Kurt Bodenbenner · Wiesbaden, DE
• Helmold von Plessen · Kelkheim, DE

Key dates

• Filing date: Dec 8, 1977
• Grant date: Mar 25, 1980
• Expiry date: Dec 8, 1997

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B17/88
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

In the regeneration of aqueous waste sulfuric acid by distilling off water often foam is formed which severely interferes with the work-up of the acid. This formation of foam is suppressed by adding alkylsulfonic and/or alkylarylsulfonic acids.