Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Patent
1996-09-27
1999-10-19
Therkorn, Ernest G.
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
210634, B01D 1104
Patent
active
059683643
ABSTRACT:
Toxic cyanide and anionic metal species are removed from aqueous alkaline solutions by contacting the aqueous alkaline solutions with an extractant compound which is capable of being protonated at a pH of 9 or above. Whereby the anionic metal species is extracted from the aqueous alkaline solution, subsequently stripping the metal values from the extractant and recovering the metal species, preferably by electrowinning. The process is useful in a flotation process in which a recycled aqueous process stream is employed in that the toxic cyanide ion and anionic metal species are removed prior to recycling of the aqueous process stream for flotation.
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MacKenzie J. Murdoch
Mattison Phillip L.
Sierakoski J. Michael
Virnig Michael J.
Weerts Keith E.
Henkel Corporation
Jaeschke Wayne C.
Span Patrick J.
Szoke Ernest G.
Therkorn Ernest G.
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