Converting fluorinated materials into anhydrous hydrogen fluoride

US11905178B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Markus E. Hirschberg · Mühldorf, DE
• Klaus Hintzer · Woodbury, US
• Thomas W. Schoettle · Wanghausen, AT
• Arne Thaler · Emmerting, DE
• Achim Schmidt-Rodenkirchen · Bayreuth, DE
• Thorsten Gerdes · Dortmund, DE
• Konstantin Mierdel · Bayreuth, DE

Key dates

• Filing date: Dec 14, 2021
• Grant date: Feb 20, 2024
• Expiry date: Dec 14, 2041

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/143
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Methods of converting a variety of fluorinated materials into anhydrous hydrogen fluoride are described. The methods include thermally decomposing the fluorinated materials into a gaseous effluent comprising hydrogen fluoride and carbon dioxide. This gaseous effluent is then treated with carbon at a temperature of at least 830° C., converting the carbon dioxide to carbon monoxide (CO) and producing a gaseous product comprising the hydrogen fluoride, which can be condensed to generate anhydrous hydrogen fluoride. These methods can also be used to convert water contained in the gaseous effluent into hydrogen.