Process for the regeneration of sulfuric acid

US4010240A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Helmold von Plessen · Kelkheim, DE
• Eberhard Fischer · Königsee, DE
• Siegfried Schiessler · Frankfurt am Main, DE

Key dates

• Filing date: Jun 12, 1974
• Grant date: Mar 1, 1977
• Expiry date: Jun 12, 1994

Classification

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

Abstract

Contaminated sulfuric acid which may contain water, organic compounds and inorganic salts is converted to almost pure concentrated sulfuric acid by passing the acid through a Pauling plant and distilling the concentrated contaminated acid. Addition of nitric acid improves the decomposition of organic compounds and ammonium salts of the contaminated acid.