Process for reducing the wash water requirement of weakly basic anion exchangers

US4705637A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Harold Heller · Narberth, US
• Peter M. Lange · Leverkusen, DE
• Friedrich Martinola · Cologne, DE

Key dates

• Filing date: May 31, 1985
• Grant date: Nov 10, 1987
• Expiry date: May 31, 2005

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J41/07
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relate to a process for reducing the wash water required by weakly basic anion exchangers containing primary and/or secondary amino groups when fed with water containing carbon dioxide; in accordance with the process the exhausted, weakly basic anion exchangers are treated with dilute aqueous mineral acids before being regenerated.