DY272 extractant
Bis(2,4,4-trimethylpentyl)phosphinic acid
CAS 83411-71-6
DY272 is a bis(2,4,4-trimethylpentyl)phosphinic acid reagent with a measured content of 93.23%, equivalent in duty to C-272. It loads cobalt from nickel-cobalt liquors so the raffinate carries the nickel, reduces the number of separation stages, and does not extract calcium. Sulphate and chloride systems are both handled, as are gallium, molybdenum, germanium and the heavy rare earths thulium, ytterbium and lutetium.
- 93.23% active content
- Cobalt-selective loading
- No calcium extraction
- Low stage count
Key parameters
Values are confirmed on the technical data sheet issued with the quotation.
- Appearance
- Colourless oil liquid
- Formula
- C16H35O2P
- Formula weight
- 290.42
- Assay
- ≥93.23%
- Density (25 °C)
- 0.91–0.925 g/cm³
- Viscosity (25 °C)
- <142 cP (154 mm²/s)
- Viscosity (50 °C)
- <37 cP (40 mm²/s)
- Flash point
- 108 °C
- Boiling point
- ≥300 °C
- Freezing point
- -32 °C
- Thermal limit
- ≤200 °C
- Phosphorus content
- >10%
- Water solubility (pH 2.6)
- <16 mg/L
Typical use
Nickel-cobalt separation in sulphate and chloride circuits, laterite liquors that need a lower stage count, and recovery of gallium, molybdenum and heavy rare earths.
- 01Applied where iron, aluminium and manganese have already been removed upstream.
- 02Calcium is not extracted, so gypsum-bearing liquors need less scrubbing than with acidic phosphorus reagents.
- 03Iron is re-extracted at low sulphuric acid concentration, which is used to clean the organic between campaigns.
Packing and storage
- 01200 kg plastic drum
- 021000 L IBC tank
Pack sizes are confirmed with the quotation. Mixed pallets and customer-specified packing are quoted on request.
- Store in a cool, dry and ventilated warehouse.
- Keep away from direct sunlight, open flame and strong oxidisers.
- Keep containers sealed and do not store with alkaline products.
