Process for recovering gallium

US4943420A · kind A · utility

Assignees

• BAYER HEALTHCARE LLC · DE
• Ingal International Gallium GmbH · DE

Inventors

• Alfred Mitschker · Odenthal, DE
• Peter M. Lange · Leverkusen, DE
• Heiko Hoffmann · Simi Valley, US
• Gunter Lossmann · Peißenberg, DE
• Andries P. van der Meer · Arnhem, NL
• Cornelius J. Smit · Zevenaar, NL

Key dates

• Filing date: Apr 13, 1989
• Grant date: Jul 24, 1990
• Expiry date: Apr 13, 2009

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S423/14
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

In the process for recovering gallium from aqueous, alkaline solutions by adsorption of the gallium on to bead-polymerized synthetic resins impregnated with 8-hydroxyquinolines and elution thereof with aqueous acids, the synthetic resins employed according to the invention are macroporous polydivinylbenzene or macroporous divinylbenzene copolymers which have been obtained by bead polymerization of divinylbenzene or mixtures of aromatic mono-, di- and/or trivinylbenzenes containing at least 50% by weight of divinylbenzene, in the presence of methyl isobutyl ketone, and which have been loaded with 160-190 g of Kelex 100 per liter of resin; in addition the resin is washed with sodium hydroxide solution after the elution step and before the commencement of each individual service cycle.