Anode useful for electrochemical conversion of anhydrous hydrogen halide to halogen gas

US5580437A · kind A · utility

Assignee

• E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

• James Arthur Trainham · Newark, US
• Clarence Garlan Law, Jr. · West Trenton, US
• John Scott Newman · Kensington, US
• Kenneth B. Keating · Wilmington, US
• Douglas J. Eames · Berkeley, US

Key dates

• Filing date: May 20, 1994
• Grant date: Dec 3, 1996
• Expiry date: May 20, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P70/50
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A particular anode comprising an electrochemically active material selected from the group consisting of the oxides of the elements tin, germanium and lead and mixtures comprising at least one of the respective oxides of such elements is useful in an electrochemical cell for the direct production of essentially dry halogen gas from essentially anhydrous halogen halide, or in a process for such production of essentially dry halogen gas. This cell or process may be used to produce halogen gas such as chlorine, bromine, fluorine and iodine from a respective anhydrous hydrogen halide, such as hydrogen chloride, hydrogen bromide, hydrogen fluoride and hydrogen iodide.