XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3 3401
Cyanex 272 can be used to separate Zn from Mn, and sep-
arate Mn from Ni, but has poor separation and requires
2–4 M of sulfuric acid to strip Mn off organic efficiently.
The synergistic effect of solvents can be used to improve
extraction of Mn. Ahmadipour et. Al (2011) tested the syn-
ergistic effect of D2EHPA and Cyanex 272. By increasing
the ratio of Cyanex 272 added to D2EHPA, the extraction
of Zn and Mn occurred at a higher pH, but the separation
factor and pH50 value of Zn from Mn was improved. They
further proved that addition of a phase modifier, tr-n-butyl
phosphate (TBP), had negligible effect on Zn extraction,
but slightly increased the extraction of Mn.
MANGANESE ION EXCHANGE
Ion-exchange (IX) processes, using such resins, have
been extensively used to generate high purity solutions.
Adsorption on chelating resins is one of the most conve-
nient methods for the separation and recovery of metal
ions. The technology has many advantages such as high
treatment capacity, high removal efficiency, removal to
extremely low concentrations and fast kinetics. There are
two broad categories of ion exchange resins, targeting either
cations or anions in solution.
Resin Selection
Impurity metals such as Cu, Ni, Co and Al can be effec-
tively and selectively removed from a Mn rich solution by
using a commercial chelating resins with either an imino-
diacetic acid (IDA) functional group, or a weakly basic bis-
picolylamine functional group as documented by Xiangzhi,
2016.
In the case of the IDA resin, it can be used in its H+
form, as it would be recycled to adsorption from the acid
elution circuit. It worth noting that ferric ions may load
strongly onto these resins and it would be essential to reject
this impurity prior to ion exchange.
The resin data for the various commercial resins are
presented in Table 2 as reported by Xiangzhi, 2016.
Figure 5 shows the concentration of metal ions
absorbed on the IDA chelating resin from acid solution as a
function of pH (documented by Xiangzhi, 2016.).
Figure 4. Extraction of base metals as function of pH by CYANEX 272 (Sole, K.C. and
Cole, P. M., 2001)
Table 2. Resin data and metal selectivity
Resin Functionality Metal selectivity order Supplier
Lewatit MonoPlus TP 207 XL Iminodiacetic acid Fe(III) Cu Ni Co Al Mn Ca Mg Na Lanxess
Amberlite IRC 748 Iminodiacetic acid Fe(III) Cu Ni Co Mn Ca Na Dow
Lewatit MonoPlus TP 220 Bis-picolylamine Cu Ni Fe(III) Co Mn K Ca Na Mg Al Lanxess
Dowex M4195 Bis-picolylamine Cu Ni Fe(III) Zn Co Cd Fe(II) Dow
Lewatit Monoplus TP 209 Iminodiacetic acid Fe (III) Cu P b Ni Zn Cd Fe (II) Mn (II) Ca
Mg Na
Lanxess
Puromet -MTS 9301 Iminodiacetic acid Fe (III) Cu P b Ni Zn Cd Fe (II) Mn (II) Ca
Mg Na
Purolite
Cyanex 272 can be used to separate Zn from Mn, and sep-
arate Mn from Ni, but has poor separation and requires
2–4 M of sulfuric acid to strip Mn off organic efficiently.
The synergistic effect of solvents can be used to improve
extraction of Mn. Ahmadipour et. Al (2011) tested the syn-
ergistic effect of D2EHPA and Cyanex 272. By increasing
the ratio of Cyanex 272 added to D2EHPA, the extraction
of Zn and Mn occurred at a higher pH, but the separation
factor and pH50 value of Zn from Mn was improved. They
further proved that addition of a phase modifier, tr-n-butyl
phosphate (TBP), had negligible effect on Zn extraction,
but slightly increased the extraction of Mn.
MANGANESE ION EXCHANGE
Ion-exchange (IX) processes, using such resins, have
been extensively used to generate high purity solutions.
Adsorption on chelating resins is one of the most conve-
nient methods for the separation and recovery of metal
ions. The technology has many advantages such as high
treatment capacity, high removal efficiency, removal to
extremely low concentrations and fast kinetics. There are
two broad categories of ion exchange resins, targeting either
cations or anions in solution.
Resin Selection
Impurity metals such as Cu, Ni, Co and Al can be effec-
tively and selectively removed from a Mn rich solution by
using a commercial chelating resins with either an imino-
diacetic acid (IDA) functional group, or a weakly basic bis-
picolylamine functional group as documented by Xiangzhi,
2016.
In the case of the IDA resin, it can be used in its H+
form, as it would be recycled to adsorption from the acid
elution circuit. It worth noting that ferric ions may load
strongly onto these resins and it would be essential to reject
this impurity prior to ion exchange.
The resin data for the various commercial resins are
presented in Table 2 as reported by Xiangzhi, 2016.
Figure 5 shows the concentration of metal ions
absorbed on the IDA chelating resin from acid solution as a
function of pH (documented by Xiangzhi, 2016.).
Figure 4. Extraction of base metals as function of pH by CYANEX 272 (Sole, K.C. and
Cole, P. M., 2001)
Table 2. Resin data and metal selectivity
Resin Functionality Metal selectivity order Supplier
Lewatit MonoPlus TP 207 XL Iminodiacetic acid Fe(III) Cu Ni Co Al Mn Ca Mg Na Lanxess
Amberlite IRC 748 Iminodiacetic acid Fe(III) Cu Ni Co Mn Ca Na Dow
Lewatit MonoPlus TP 220 Bis-picolylamine Cu Ni Fe(III) Co Mn K Ca Na Mg Al Lanxess
Dowex M4195 Bis-picolylamine Cu Ni Fe(III) Zn Co Cd Fe(II) Dow
Lewatit Monoplus TP 209 Iminodiacetic acid Fe (III) Cu P b Ni Zn Cd Fe (II) Mn (II) Ca
Mg Na
Lanxess
Puromet -MTS 9301 Iminodiacetic acid Fe (III) Cu P b Ni Zn Cd Fe (II) Mn (II) Ca
Mg Na
Purolite