2 research outputs found
Cobalt(II) membrane-extraction by DP-8R/Exxsol D100 using pseudo-emulsion based hollow fiber strip dispersion (PEHFSD) processing
The transport of cobalt(II) from acidic sulphate solutions through PEHFSD was investigated using the
extractant DP-8R in Exxsol D100. The acidic feed solution containing Co(II) was passed through the tube
side, and pseudo-emulsions of DP-8R/Exxsol D100 and sulphuric acid was passed through the shell side
in counter-current mode, using a single microporous hydrophobic polypropylene hollow fiber contactor
for extraction and stripping. In PEHFSD the aqueous strip (sulphuric acid) solution was dispersed in the
organic membrane solution in a reservoir tank with an impeller stirrer to form a strip dispersion. This
pseudo-emulsion phase is circulated from the tank to the membrane module to provide a constant supply
of the carrier solution to the membrane micropores. Several hydrodynamic and chemical parameters,
such as variation in feed pH (3–7), cobalt concentration in feed (0.17–1.7 10 3 M), carrier concentration
(0.16–1.28 M), etc., were investigated. Mass transfer modelling was performed and the validity of
the model was evaluated with experimental data. Moreover, the system was applied in the cobalt
purification of synthetic lithium solutions derived from the processing of rechargeable batteries, with
cobalt/lithium separation factor values around 25.To the CSIC (Spain) for support. Dr. I. Garcia-Diaz acknowledged
the research contract JAEDOC_09_00893 received from CSIC
(Spain).Peer reviewe
Cobalt(II) membrane-extraction by DP-8R/Exxsol D100 using pseudo-emulsion based hollow fiber strip dispersion (PEHFSD) processing
The transport of cobalt(II) from acidic sulphate solutions through PEHFSD was investigated using the
extractant DP-8R in Exxsol D100. The acidic feed solution containing Co(II) was passed through the tube
side, and pseudo-emulsions of DP-8R/Exxsol D100 and sulphuric acid was passed through the shell side
in counter-current mode, using a single microporous hydrophobic polypropylene hollow fiber contactor
for extraction and stripping. In PEHFSD the aqueous strip (sulphuric acid) solution was dispersed in the
organic membrane solution in a reservoir tank with an impeller stirrer to form a strip dispersion. This
pseudo-emulsion phase is circulated from the tank to the membrane module to provide a constant supply
of the carrier solution to the membrane micropores. Several hydrodynamic and chemical parameters,
such as variation in feed pH (3–7), cobalt concentration in feed (0.17–1.7 10 3 M), carrier concentration
(0.16–1.28 M), etc., were investigated. Mass transfer modelling was performed and the validity of
the model was evaluated with experimental data. Moreover, the system was applied in the cobalt
purification of synthetic lithium solutions derived from the processing of rechargeable batteries, with
cobalt/lithium separation factor values around 25.To the CSIC (Spain) for support. Dr. I. Garcia-Diaz acknowledged
the research contract JAEDOC_09_00893 received from CSIC
(Spain).Peer reviewe