Continuous or semi-continuous freezing coagulation method for aqueous polymer dispersions

US9926387B2 · kind B2 · utility

Assignee

• Evonik Röhm GmbH · DE

Inventors

• Dominic Stoerkle · Darmstadt, DE
• Andreas Weber · Rabenau, DE
• Johannes Vorholz · Alzenau, DE
• Melanie Jungkamp · West Lafayette, US
• Marcus Denger · Brensbach, DE
• Norbert Hoffmann · Griesheim, DE
• Mona Rueppel · Weener, DE
• Reiner Mueller · Rottweil, DE
• Klaus Albrecht · Mainz, DE

Key dates

• Filing date: Nov 6, 2014
• Grant date: Mar 27, 2018
• Expiry date: Nov 6, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F6/22
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a continuous or semi-continuous freeze coagulation process for aqueous polymer dispersions, wherein said process comprises a freezing step and a solid-liquid separation step and is further characterized in that it comprises the further step of admixing water and/or water vapor between the freezing step and the solid-liquid separation step.