Recovery of Co+2 Ions from Aqueous Solutions by Froth Flotation. Part II. CoS Precipitation

 
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Recovery of Co+2 Ions from Aqueous Solutions by Froth Flotation. Part II. CoS Precipitation

Mavros, Pavlos
Koutlemani, M.M.
Zoumpoulis, Anastasios

Cobalt ions have been recovered from aqueous solutions by dispersed-air flotation in acidic conditions. The preliminary step of precipitation as cobalt sulfide using Na2S is kinetically limited, with only approximately 70% of the cobalt ions being recovered. Recoveries increase considerably under alkaline conditions. where CO(OH)2 also precipitated. Several collectors have been tested: cetyl trimethyl ammonium bromide, sodium dodecyl sulfate, cetyl pyridinium chloride, and dodecylamine; dodecylamine was found to be the most efficient. The gas flow rate was found to affect the process, with a flow rate corresponding to a superficial gas velocity of 0.1 cm/s yielding maximum recoveries; any further gas flow rate increase resulted in lower recoveries. An increase in column height was found to have an adverse effect on CoS recovery.

Article / Άρθρο
info:eu-repo/semantics/article

Cobalt ions
Precipitate flotation Column flotation
Cobalt sulfide
Dodecylamine

Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (EL)
Aristotle University of Thessaloniki (EN)

Αγγλική γλώσσα

1995
2009-07-08T10:44:26Z


Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης, Σχολή Θετικών Επιστημών, Τμήμα Χημείας

Separation Science and Technology, vol.30 no.2 [1995] p.263-284 [Published Version]
urn:ISSN:01496395

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info:eu-repo/semantics/openAccess



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