Process of making fluoroolefins by thermal decomposition of fluorinated ionomers

US12286387B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Arne Thaler · Emmerting, DE
• Achim Schmidt-Rodenkirchen · Bayreuth, DE
• Mark W. Muggli · West St. Paul, US
• Konstantin Mierdel · Bayreuth, DE
• Klaus Hintzer · Woodbury, US
• Thorsten Gerdes · Dortmund, DE
• Denis Duchesne · Woodbury, US
• Gregg D. Dahlke · Windom, US

Key dates

• Filing date: Dec 17, 2020
• Grant date: Apr 29, 2025
• Expiry date: Jun 3, 2042

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/50
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The process produces a fluorinated olefin from a fluorinated copolymer having at least one of sulfonic acid groups, carboxylic acid groups, or salts thereof. The process includes heating the fluorinated copolymer at a first temperature not more than 450° C. to decompose at least one of the sulfonic acid groups, carboxylic acid groups, or salts thereof to form a partially pyrolyzed intermediate and subsequently heating the partially pyrolyzed intermediate at a second temperature of at least 550° C. to produce the fluorinated olefin.