Modified, fine-particle, water-insoluble aziridine polymer and use therefore for removing heavy metals from aqueous solution

US6063286A · kind A · utility

Assignee

• BASF SE

Inventors

• Ulrich Steuerle · Heidelberg, DE
• Wolfgang Reuther · Neckargemünd, DE
• Hubert Meixner · Ludwigshafen, DE
• Michael Ehle · Ludwigshafen, DE
• Thomas Greindl · Bad Dürkheim, DE
• Rainer Betz · Stockach, DE

Key dates

• Filing date: Oct 22, 1998
• Grant date: May 16, 2000
• Expiry date: Oct 22, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S210/912
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Process for preparing fine-particle, water-insoluble polymers of aziridines by polymerizing aziridines, preferably ethylenimine, in the presence of crosslinkers which contain at least two functional groups, and in at least one ether, and also modified, water-insoluble polymers of aziridines which can be obtained by reacting fine-particle, water-insoluble, crosslinked polymers of aziridines, in aqueous medium, with carbon disulfide or formaldehyde and a nucleophilic agent from the group consisting of alkali metal cyanides, primary amines, secondary amines, alkali metal sulfites and alkali metal phosphites, and use of the modified and non-modified fine-particle, water-insoluble polymers for immobilizing active compounds, as absorbents for aldehydes, ketones and acids, and also for removing heavy metal ions from wastewaters.