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Extraction Of Cobalt From Spent CMB Catalyst Using Supercritical CO2

Joo S.-H., Shin S. M.

Archives of Metallurgy and Materials

2015

Vol. 60, iss. 2B

1535--1537

The metal extraction from spent CMB catalyst using supercritical CO2(scCO2) was investigated with single organic system, binary organic system and ternary organic system to extract metal ions. Leaching solution of spent CMB catalyst containing 389 mg L-1 Co2+, 187 mg L-1 Mn2+, 133 mg L-1 Na+, 14.97 mg L-1 Ca2+ and 13.2 mg L-1 Mg2+. The method consists of scCO2/ligands complexation process and metal extraction process at 60°C and 200bar. The result showed the Co and Mn was selectively extracted from Mg, Ca and Na in the ternary system of mixture of Cyanex272, DEA and Alamine304-I.