多孔質ガラス充填カラムによるニッケルとコバルトの分離

概要

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When the adsorption band of nickel and cobalt formed in a porous glass packed column was developed by aqueous solutions of ammonium chloride with concentration of 8× 103mol/m3 at pH 7.5 and ammonium nitrate of 2× 103 mol/m3 at pH 8, these metals were completely separated. Since the recovery of cobalt was not complete, some treatments for prevention of oxidation such as additions of reducing agents, that is, ascorbic acid and sodium sulfite, and degassing by irradiation with supersonic waves were tried and showed improvement of the recovery of cobalt and reduction of separation efficiency. Using an aqueous solution of ethylenediamine at pH8, without any treatments for prevention of oxidation, both separation and recoveries of these metals were almost completely accomplished when the concentrations in conditioning solution and eluent were 500mol/m3 and 50mol/m3, respectively.
社団法人化学工学会の論文