Laterite-nickel ore only has low content nickel and cobalt, and has a lot of impurities, the process of getting pure nickel and cobalt is complex. First step should use P204 (D2EHPA) to remove impurities, second use DZ272 to take out cobalt, then wash Mg and Mn ion to left nickel ion.
The active component of DZ272 extractant is bis(2,4,4-trimethylpentyl)phosphinic acid, the content of our DZ272 is 93.23%, it is more than 85% too much, the performance is better than others 272.
Chemical name: Bis-(2,4,4-Trimethylpentyl)-Phosphinic Acid
CAS No.: 83411-71-6
EINECS No.: 280-445-7
Chemical structure formula:
Formula: C16H35O2P
Mol. wt.: 290.42
Performance characteristics:
|
ITEM |
DATA |
| Appearance |
Colorless oil liquid |
| Smell |
Light aromatic |
| Purity |
≥93.23% |
| Density (25°C) |
0.91-0.925 g/ml3 |
| Viscosity (25°C) |
<142 cP (154 mm2/s) |
| Viscosity (50°C) |
<37 cP (40 mm2/s) |
| Thermal ability |
≤200°C |
| Flash point |
108°C |
| Boiling point |
≥300°C |
| Freezing point |
-32°C |
| Phosphorus content |
>10% |
| Solubility | Slightly soluble in water, soluble in alkaline water and most organic solvents |
| Water solubility (pH=2.6) |
<16mg/L |
| Water content |
<1% |
Advantage:
1. The effective component of DZ-272 can over 90%, has good extraction ability, high selectivity, low water-soluble ability, easy to be stripped.
2. The extraction step of DZ-272 is less, can save a lot of investment on equipment and hand work, will save a lot of cost.
3. The price of DZ-272 is lower than competitor very much.
Stability:
DZ272 can be worked long time in the appropriate conditions of pH value and temperature, the physical and chemical properties are stably, does not find out obvious phenomenon of be hydrolysis or extraction selectivity is reduced etc.
Loss of dissolution:
We tested the loss of dissolution of DZ272 in aqueous phase conditions of different pH value and aqueous salt concentration, the solubility in aqueous phase is proportional to the pH value, but is inversely proportional to the concentration of aqueous salt, this is same as normal acidic extractant, and the loss of dissolution is less, the dissolution is same as other commercial extractant.
