Removal of anionic compounds from water

US4425238A · kind A · utility

Assignee

• BASF SE

Inventors

• Hans-Juergen Degen · Lorsch, DE
• Wolf Guender · Neustadt, DE
• Friedrich Linhart · Heidelberg, DE
• Werner Auhorn · Bischofswerda, DE
• Guenter Frey · Schifferstadt, DE
• Werner Streit · Worms, DE
• Rolf Fikentscher · Ludwigshafen, DE

Key dates

• Filing date: Feb 19, 1982
• Grant date: Jan 10, 1984
• Expiry date: Feb 19, 2002

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S210/917
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

A process for removing anionic compounds from water which is recycled in manufacturing processes, and from waste water, by adding (1) water-soluble products obtained by reacting an alkylating agent, having an aromatic substituent, with a cationic polyelectrolyte and (2) mineral adsorbents and/or a magnesium salt, aluminum salt or iron salt, with formation and flocculation of water-insoluble reaction products.