Process for the separation of cadmium (Cd.sup.++)-ions from sewage, waste water and aqueous solutions

US4172784A · kind A · utility

Assignee

• Deutsche Gold- und Silber-Scheideanstalt Vormals Roessler

Inventors

• Helmut Knorre · Seligenstadt, DE
• Gerhard Pohl · St. Georgen, DE
• Klaus Stutzel · Frankfurt, DE

Key dates

• Filing date: Sep 6, 1977
• Grant date: Oct 30, 1979
• Expiry date: Sep 6, 1997

Classification

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

Abstract

Cadmium (Cd.sup.++) ions are separated from an effluent containing complexing agent such as nitrilotriacetic acid, ethylenediamine tetraacetic acid and/or diethylenetriamine pentaacetic acid, or their anionic salts by using an HS-containing triazine compound and Fe.sup.+++ ions in a quantity at least equal to the amount of complexing agent.