Recovery of titanium from the leach liquors of titaniferous magnetites by solvent extraction: Part 1. Review of the literature and aqueous thermodynamics

Solvent extraction of Fe3+ from chloride solution by D2EHPA in kerosene

Recent progress in impurity removal during rare earth element processing: A review

This work describes the extraction and separation of Mn(II), Co(II), Ni(II) and Li(I) from the leach liquor of mixed lithium ion batteries using 0.04 M Na-CYANEX272. Before the extraction step, elimination of some impurities such as Fe(III), Cu(II) and Al (III) was carried out by 20% Acorga M5640 in kerosene with agitation for 5 min at 30 °C at equal phase ratio of unity. The effects of the different parameters affecting the extraction rate, such as mixing time, pH, extractant concentration and temperature, were separately investigated. The obtained results indicate that the extraction behavior of the investigated metal ions depends on the pH value, where 91.2% Mn(II), 89.3% Co(II) and 95.6% Ni(II) were extracted at pH 3.5, 5.0 and 8.0, respectively, while the extraction of Li(I) was almost constant regardless of the pH value. Mn(II), Co(II) and Ni(II) were extracted in the organic phase as (MA 2 •3HA) (org) while Li(I) was extracted as (MA•2HA) (org) . The thermodynamic parameters were calculated by applying Van't Hoff equations. A complete stripping and precipitation from the organic and aqueous phases could be achieved with different stripping and precipitating agents. Precipitates of Mn(II), Co(II), Ni(II) and Li(I) with purity > 99% could be obtained under the investigated conditions.

Selective extraction and separation of metal values from leach liquor of mixed spent Li-ion batteries

http://www.ysxbcn.com/down/upfile/soft/20120228/34-p0461.pdf

H. Rahman

Papers

Solvent extraction separation study of Ti(IV) Fe(III) and Fe(II) from aqueous solutions with di-2-ethyl hexyl phosphoric acid in benzene