Selective recovery of cobalt(II) towards lithium(I) from chloride media by transport across polymer inclusion membrane with triisooctylamine

Beata Pospiech

doi:10.2478/pjct-2014-0003

Abstract

Abstract In this work the selective transport of cobalt(II) and lithium(I) ions from aqueous chloride solutions through polymer inclusion membranes (PIMs) is presented. Triisooctylamine (TIOA) has been applied as the ion carrier in membrane. The effects of various parameters on the transport of Co(II) and Li(I) were studied. The obtained results show that Co(II) ions were effectively removed from source phase through PIM containing 32 wt.% TIOA, 22 wt.% CTA (cellulose triacetate) and 46 wt.% ONPOE (o-nitrophenyl octyl ether) or ONPPE (o-nitrophenyl pentyl ether) into deionized water as the receiving phase. The results indicate that there is a possibility of polymer inclusion membranes application to recover Co(II) and Li(I) from aqueous chloride solutions

Highlights

Cobalt and lithium have very important physicochemical properties and play a significant role in the industrial development
The obtained results show that Co(II) ions were effectively removed from source phase through polymer inclusion membranes (PIMs) containing 32 wt.% TIOA, 22 wt.% cellulose triacetate (CTA) and 46 wt.% ONPOE (o-nitrophenyl octyl ether) or ONPPE (o-nitrophenyl pentyl ether) into deionized water as the receiving phase
Polymer inclusion membranes with triisooctylamine as ion carrier provide an attractive alternative to conventional solvent extraction methods for the separation of cobalt(II) and lithium(I)

Summary

Introduction

Cobalt and lithium have very important physicochemical properties and play a significant role in the industrial development. A variety of applications of these metals, especially in the production of lithium ion batteries (LIBs), demands huge amounts of them. The demand for cobalt will continue to increase owing to the development of countries such as China. This increase should accelerate with the expected increase of electric vehicle production as the total amount of cobalt in lithium batteries for an electric vehicle is not negligible, i.e. 81.4 kg of cobalt. Lithium-ion batteries (LIBs) are used as electrochemical power sources in mobile telephones, laptops, video-cameras, etc. Total world production in 2009 and 2010 was about 18 800 and 25 300 tons, respectively, and lithium prices have nearly tripled over the last 10 years[2]

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