Separation of Cobalt and Nickel from Aqueous Solution

Abstract

Recovery of pure cobalt and nickel from diverse resources is important due to the increased demand for these metals. In order to get cobalt and nickel with high purity, separation of them from other metal ions is necessary. In this review, several methods to obtain pure cobalt or nickel solution, such as solvent extraction, ion exchange, precipitation were introduced and compared. For solvent extraction, the advantage and disadvantage of the separation process together with detailed process conditions were investigated.

Separation of Cobalt and Nickel from Sulfate Solutions

“…In the leach liquors, cobalt and nickel are difficult to separate because of their similar physical and chemical properties [1][2][3]. Solvent extraction is the main technology for separating nickel and cobalt [4][5][6], but needs many stages of extraction procedures and is easy to be influenced by the Mg 2+ ions in the solutions. .…”

Removal of Copper from the Solution Containing Copper, Nickel, Cobalt and Iron

“…철이나 아연을 첨가하여 금속치환법(cementation)으로 구리를 침전 [9][10] 3. 황화구리로 침전, 제거 [11][12][13][14] 4. 이온 교환수지법에 의한 구리의 선택적 흡착, 제거 [15][16][17]…”