Continuous process for the concentration of W/O-emulsions by evaporation

US4533432A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Gerd Goldmann · Krefeld, DE
• Georg Spott · Krefeld, DE
• Christian Frohlich · Krefeld, DE

Key dates

• Filing date: Jun 23, 1983
• Grant date: Aug 6, 1985
• Expiry date: Jun 23, 2003

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S159/16
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The continuous process makes it possible to reduce the water content of polymers to minor residual levels (ppm) by adding to a W/O-emulsion an extractant which is subsequently evaporated with the oil.