Gvk. Puvvada et al., SOLVENT-EXTRACTION OF GALLIUM FROM AN INDIAN BAYER PROCESS LIQUOR USING KELEX-100, Minerals engineering, 9(10), 1996, pp. 1049-1058
Citations number
8
Categorie Soggetti
Engineering, Chemical","Mining & Mineral Processing",Mineralogy
Solvent extraction of gallium from a concentrated Indian Bayer process
liquor was studied using 7-alkyl-substituted-8-hydroxyquinoline (Kele
x-100) as an extractant and iso-decanol and kerosene as a modifier and
a diluent, respectively. The composition of the Payer process liquor
was found to be approximate to 450 gpl of Na2O, approximate to 80 gpl
of Al2O3 and 190 +/- 20 ppm of gallium. The recovery percentage and th
e kinetics of extraction are; improved by increasing the concentration
of Kelex-100 in the organic phase from 6 to 14 vol%. However, the ini
tial rate of extraction was slowed down at 16 and 18 vol% of Kelex-100
. The initial rate of extraction was found to be improved by reducing
the iso-decanol volume from 12 to 6% at 12 vol% of Kelex-100. The sodi
um and aluminium up take of the organic phase was found to be decrease
d with a decrease in the volume percent of iso-decanol. Minor addition
s of petroleum sulfonate improves the kinetics of gallium extraction s
ignificantly. The scrubbing of the loaded organic phase was found to b
e best at 6.0M HCl with a 1.0:1.5 organic to aqueous ratio, whereas, s
tripping was found to be best at 1.5M HCl with a 1.0:1.0 organic to aq
ueous ratio. Copyright (C) 1996 Published by Elsevier Science Ltd.