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Using Cyanex 923 for selective extraction in a high concentration chloride medium on nickel metal hydride battery waste

Kristian Larsson (Institutionen för kemi- och bioteknik, Industriell materialåtervinning) ; Christian Ekberg (Institutionen för kemi- och bioteknik, Kärnkemi) ; Arvid Ödegaard-Jensen (Institutionen för kemi- och bioteknik, Kärnkemi)
Hydrometallurgy (0304-386X). Vol. 129 (2012), p. 35-42.
[Artikel, refereegranskad vetenskaplig]

The extraction properties of the solvating extractant trialkylphosphine oxide mixture Cyanex 923 have been investigated using liquid-liquid extraction methods on leach liquors from nickel metal hydride batteries dissolved in 8 M hydrochloric acid. Separation routes for leach liquors from individual electrode materials and a mixed material were developed. The batteries used in this study contained thirteen metals and the developed separation schemes separate them in up to four fractions. The main fraction in each case contains nickel, also potassium and magnesium if present in the feed. Part of the nickel raffinate is refluxed to the dissolution step in order to reduce the amount of metals to be extracted into the organic phase. A nitrate strip step separates the cobalt and manganese from the lanthanoid content, since lanthanoid nitrate complexes are extracted.

Nyckelord: Recycling, NiMH, Cyanex 923, Chloride, Solvent extraction, solvent-extraction, recovery, cobalt, separation, values

Denna post skapades 2013-02-07. Senast ändrad 2015-11-05.
CPL Pubid: 173251


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Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Industriell materialåtervinning (2007-2014)
Institutionen för kemi- och bioteknik, Kärnkemi (2005-2014)



Chalmers infrastruktur