Extraction process for the selective removal of cobalt (ii)...

Details Extraction process for the selective removal of cobalt (ii)... Extraction process for the selective removal of cobalt (ii)...

C - Chemistry, Metallurgy

22

B

53/310

C22B 3/38 (2006.01) C01G 51/00 (2006.01) C07F 9/30 (2006.01)

Patent

CA 1177256

2 28 TITLE: EXTRACTION PROCESS FOR THE SELECTIVE REMOVAL OF COBALT(II) FROM AQUEOUS SOLUTIONS ABSTRACT OF THE DISCLOSURE Cobalt(II)-, nickel(II)-bearing aqueous solutions may be treated with an extractant comprising an organic-soluble phosphinic acid, or a salt thereof, to separate the cobalt(II) from the aqueous solution. Typical extraction techniques compatible with the instant process include liquid- liquid extraction employing either mixer settlers or columns, packed beds of supported extractants as in ion exchange, liquid membrane extraction and selective supported membrane extrac- tion.

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