Process and device for preparing a polymer of tetrafluoroethylene in aqueous suspension

US5760148A · kind A · utility

Assignee

• Dyneon GmbH · DE

Inventors

• Gerd Muller · Jena, DE
• Thomas Schottle · Burghausen, DE

Key dates

• Filing date: May 31, 1995
• Grant date: Jun 2, 1998
• Expiry date: May 31, 2015

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2219/00162
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The polymerization of tetrafluoroethylene in aqueous suspension can be carried out with high conversion if the medium is thoroughly mixed using an axially conveying stirrer element in such a manner that a cone forms at least as far as the vicinity of the stirrer element. In the region of this stirrer element there are expediently arranged baffles which extend only over a part of the filling height of the reactor.