Selective Extraction of Cobalt and Nickel in the Presence of Magnesium from Sulphate Solutions by Versatic Acid 10

Yeon chul Cho; Jae woo Ahn; Jae young Lee

doi:10.7844/kirr.2020.29.4.51

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2020 Vol.29, Issue 4 Preview Page Next Page

Research Paper

Selective Extraction of Cobalt and Nickel in the Presence of Magnesium from Sulphate Solutions by Versatic Acid 10 마그네슘이 함유된 황산용액에서 Versatic acid-10에 의한 코발트와 니켈의 선택적 추출

31 August 2020. pp. 51-57

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Abstract

Separation of Co and Ni over Mg from the sulfuric acid solutions using Cyanex272, PC88A and Versatic acid 10 as an extractant was carried out. From the comparative studies about the extraction behavior of Co, Ni and Mg, Versatic acid 10 was superior to Cyanex272 and PC88A for the selective extraction of cobalt and nickel from the mixed solutions. About 98% of Ni and Co were extracted at equilibrium pH 7.0 and less than 5% of Mg was co-extracted by Versatic acid 10. McCabe-Thiele diagram indicated two stages requirement for Co and Ni extraction by 10% Versatic acid 10 at pH 7.0 and phase ratio (A/O) of 2.0. The loaded Co and Ni in organic phase was stripped effectively the sulfuric acid concentration above 70 g/L. 99.78% of cobalt and 98.42% of nickel were stripped.

Keywords

Solvent extraction

cobalt

nickel

magnesium

separation

황산용액에서 코발트와 니켈을 마그네슘으로부터 분리하기 위해 추출제로 Cyanex272, PC88A 그리고 Versatic acid 10를 사용하여 추출실험을 실시하였다. 코발트, 니켈 및 마그네슘의 추출거동을 비교 실험한 결과, Versatic acid 10이 가장 우수하다는 것을 알 수 있었다. 평형 pH 7.0에서 Versatic acid 10을 사용하여 약 98%의 코발트 와 니켈이 추출되고, 5% 이하의 마그네슘이 공추출 되었다. McCabe-Thiele 도표 분석으로부터 pH 7.0, 상비(A/O) 2.0에서 10% Versatic acid 10에 의해 코발트 와 니켈을 추출하기 위해서는 2단이 필요하였다. 유기상에 추출된 코발트 및 니켈은 70g/L H₂SO₄ 이상인 경우 효과적으로 탈거가 가능하였고, 이때 코발트는 99.78%, 니켈은 98.42% 탈거되었다.

키워드

용매추출

코발트

니켈

마그네슘

분리

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Information

Publisher :The Korean Institute of Resources Recycling
Publisher(Ko) :한국자원리싸이클링학회
Journal Title :Journal of the Korean Institute of Resources Recycling
Journal Title(Ko) :자원리싸이클링
Volume : 29
No :4
Pages :51-57
Received Date : 2020-06-08
Revised Date : 2020-06-29
Accepted Date : 2020-07-08
DOI :https://doi.org/10.7844/kirr.2020.29.4.51

Resources Recycling ISSN:2765-3439(Print) 2765-3447(Online) 자원리싸이클링

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