Extraction of onium salts from process waters and waste waters

US4487698A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Karsten-Josef Idel · Krefeld, DE
• Dieter Freitag · Krefeld, DE
• Edgar Ostlinning · Goldkronach, DE

Key dates

• Filing date: Apr 20, 1983
• Grant date: Dec 11, 1984
• Expiry date: Apr 20, 2003

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S210/908
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

A process for removing onium salts from aqueous solutions comprising adding a phenolic compound to an onium salt containing aqueous solution, contacting the solution with a water-immiscible organic material whereby the onium salt migrates into the water-immiscible organic material and separating the aqueous hase from the onium salt in the water-immiscible organic material.