Processes for the selective separation of iron and aluminium

US10087501B2 · kind B2 · utility

Assignees

• UNIVERSITY OF SOUTH AUSTRALIA · AU
• Shanxi Ruienze Technology Co., Ltd. · CN
• Shanxi University · CN

Inventors

• Fangqin Cheng · Taiyuan, CN
• Li Cui · Westborough, US
• Jingfang Zhou · Salisbury, AU
• John Ralston · Melbourne, AU
• Fangbin Xue · Taiyuan, CN

Key dates

• Filing date: Aug 7, 2015
• Grant date: Oct 2, 2018
• Expiry date: Aug 7, 2035

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P10/20
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

This disclosure relates to a process for selectively extracting Fe(III) ions from an aqueous feedstock containing Fe(III) ions and non-ferric ions. The process comprises contacting the feedstock with an organic phase comprising a phosphonium salt or ammonium salt ionic liquid under liquid-liquid extraction conditions for a time sufficient to allow transfer of at least some of the Fe(III) ions from the feedstock to the organic phase to provide an Fe(III) ion laden organic phase and an Fe(III) depleted feedstock, and separating the Fe(III) ion laden organic phase from the Fe(III) depleted feedstock.