Separation of Cobalt from Liquid Media

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Co


Mining & Cobalt Refining

Dow has developed multiple resin products to refine cobalt, depending on the separation need:

Extraction of cobalt and nickel is achieved with DOW™ XUS 43578.00 Developmental Chelating Resin; a two-stage elution then separates the cobalt from nickel.

Separation of cobalt from zinc is accomplished with AMBERLITE™ IRC747 Chelating Resin.

Today, DOWEX™ M4195 Chelating Resin is used to facilitate the difficult separation of nickel from cobalt in cobalt refining facilities with examples in a nickel refinery in Ontario, Canada and a cobalt refinery in Zambia, Africa. The Zambian refinery is designed to produce between 2,000 and 4,000 tons of cobalt and more than 5,000 tons of copper per year from the slag dumps. See the references below for details on the use of DOWEX M4195 Chelating Resin in the refining of cobalt.

NOTICE: If products, such as DOW™ XUS products, are described as “experimental” or “developmental”: (1) product specifications may not be fully determined; (2) analysis of hazards and caution in handling and use are required; (3) there is greater potential for Dow to change specifications and/or discontinue production; and (4) although Dow may from time to time provide samples of such products, Dow is not obligated to supply or otherwise commercialize such products for any use or application whatsoever.


Plating

Cobalt is often a problem metal in precious metal and trivalent chromium plating operations. The distinct ability of DOW™ XUS 43578.00 Developmental Chelating Resin to selectively sorb Co2+ from strongly acidic media makes it perfect for many acidic plating baths and for bright-dip rinse applications in aluminum finishing processes. DOW XUS 43578.00 Resin offers superior kinetics due to its uniform particle size distribution. In systems requiring lowest pressure drop, DOWEX™ M4195 Chelating Resin will be preferred.

In some solutions of hydrochloric acid, cobalt forms anionic complexes (43KB PDF) that can be captured using a strong base anion exchange resin like DOWEX 21K XLT Resin.

NOTICE: If products, such as DOW™ XUS products, are described as “experimental” or “developmental”: (1) product specifications may not be fully determined; (2) analysis of hazards and caution in handling and use are required; (3) there is greater potential for Dow to change specifications and/or discontinue production; and (4) although Dow may from time to time provide samples of such products, Dow is not obligated to supply or otherwise commercialize such products for any use or application whatsoever.


Water/Wastewater

Removal of cobalt from water and organic solvents is fairly common using strong acid cation resins. For waters with low levels of salt content, a strong acid cation resin such as DOWEX™ G 26 (H) Resin would be a good starting point. In addition, weakly acidic cation exchange resins like DOWEX MAC 3 Resin are often quite selective for multivalent ions such as Co2+.

If the wastewater is highly acidic, DOWEX M4195 Chelating Resin is recommended.


References

“Development of an ion exchange process to recover cobalt and nickel from primary lead smelter residues” by Kennedy, D. C.; Becker, A., III; Worcester, A., A., Conference: Metals Specification, Separation, and Recovery, Chicago, Illinois, USA, 27 July -1 August, 1986, Lewis Publishers, Inc., 121 South Main St., PO Drawer 519, Chelsea, Michigan, 48118, USA, 1987.

“Cobalt recovery from copper leach solutions” by Jeffers, T. H.; Harvey, M. R., Report, Rep. Invest. - US, Bur. Mines (1985), RI 8927, 16 pp.

“Separation and recovery of cobalt from copper leach solutions” by Jeffers, T. H., Journal, J. Met. (1985), 37(1), 47-50.

“Separation of nickel from cobalt in sulfate medium by ion exchange” by Rosato, L.; Harris, G. B.; Stanley, R. W., Hydrometallurgy (1984), 13(1), 33-44.

“Selective absorption of copper, nickel, cobalt and other transition metal ions from sulfuric acid solutions with the chelating ion exchange resin XFS 4195” by Grinstead, Robert R., Patent US 4451375 A 840529, US 83-526303 830825, The Dow Chemical Company, USA, 3 pp.

“Ammoniacal elution of copper from ion exchange resins” by Byleveld, Eduard, Patent US 4371506 A 830201, US 81-274865 810618, Himsley Engineering Ltd., Can. US, 8 pp.