P204 metal extractant (D2EHPA or HDEHP) is widly be used for impurity removal for laterite-nickel ore, it has good ability for removing impurities in the process of extract nickel and cobalt, also can extract other metal as Zinc etc.
Laterite-nickel ore has complex metal ion and low content of nickel and cobalt, normally use P204 metal extractant which named Di-(2-ethylhexyl)phosphoric acid (D2EHPA or HDEHP) to remove impurities (most of metals), only left nickel/cobalt/magnesium ion. Use DZ272 to extract cobalt and magnesium, the balance is nickel ion.
P204 metal extractant is used for early impurity removal: zinc, copper, calcium, magnesium, cadmium and other metal elements can be extracted. P507 extractable cobalt. DY272 can be used to extract magnesium, manganese, etc.
P204 (D2EHPA) specification:
Name: Di-(2-ethylhexyl)phosphoric acid (D2EHPA or HDEHP)
IUPAC name: Bis(2-ethylhexyl) hydrogen phosphate.
CAS: 298-07-7
EINECS: 206-056-4
Molar mass: 322.43 g/mol
Content: 95.64%
|
ITEM |
ACTUAL DATA |
| Chemical formula |
(C8H17O)2PO2H |
| Formula weight (g/mol) |
322.48 |
| Content of P204 |
95.64% |
| Isooctyl phosphonate |
1.89% |
| Color (Pt-Co) |
100 |
| Phase separate time (s) |
90 |
| Acid value (mgKOH/g) |
168 |
| Density (25°C) g/ml |
0.972 |
| Viscosity (25°C cps) |
42 |
| Flash point (°C) |
160 |
| Freezing point (°C) |
-60 |
| Boiling point (°C) (1.33kPa) |
209 |
| Ignition point (°C) |
233 |
| Refractivity (25°C) |
1.4439 |
P204 metal Extractant also be named (Synonyms) as below:
2-Ethyl-1-Hexanol Hydrogen Phosphate
DI(2-Ethylhexyl) Phosphate
DI(2-Ethylhexy)Phosphoric Acid
D2EHPA
Diisooctyl Acid Phosphate
Diisooctyl phosphate
Dioctyl Phosphate
HDEHP
Phosphoric Acid Bis (2-Ethylhexyl) Ester
Phosphoric Acid Di(2-Ethylhexyl) Ester
Phosphoric Acid Dioctyl Ester
Bis(2-ethylhexyl)orthophosphoric acid
Bis(2-ethylhexyl) phosphoric acid
Bis(2-ethylhexyl) phosphate
Bis(2-ethylhexyl) hydro phosphoric acid
BEHPA
Bis(2-ethylhexyl) hydrogen phosphate
BEHP
BEHHPA
BEHHP
EHPA
P204 Metal Extractant Overview
P204, also known as Di(2-ethylhexyl) phosphoric acid (D2EHPA), is a widely used extractant in the metallurgical industry for the separation and purification of non-ferrous and rare metals. Below is a detailed overview of its properties, applications, and industrial relevance based on the search results.
Key Properties of P204
- Chemical Formula: (C8H17O)2PO2H
- Molecular Weight: 322.43
- Appearance: A slightly yellow, transparent oily liquid.
- Solubility: Soluble in organic solvents like alcohols.
- Physical Properties:
- Density: 0.972 g/mL (20°C)
- Viscosity: 42 ± 3 CPS (20°C)
- Flash Point: ≥190°C (open cup)
- Refractive Index: 1.4435–1.4448 (20°C)
- Acid Value: 150–189 mg KOH/g
- Phase Separation Speed: ≤60 seconds (chemical grade).
- Regular solvent oil: 260# solvent oil
- Common ratio: 25%
Applications of P204
P204 is extensively used in the extraction and separation of metals, particularly in the following areas:
Non-Ferrous and Rare Metal Extraction
- Target Metals:
- Rare Earth Elements (REEs): Such as lanthanum, cerium, and neodymium.
- Non-Ferrous Metals: Including cobalt (Co), nickel (Ni), copper (Cu), and zinc (Zn).
- Precious Metals: Such as gold (Au) and platinum (Pt).
- Mechanism: P204 selectively binds to metal ions in acidic solutions, enabling their separation from mixed solutions. For example, it is used to separate cobalt and nickel, which are critical for battery materials.
Wastewater Treatment
- P204 is employed in treating industrial wastewater contaminated with heavy metals and organic compounds, ensuring environmental compliance.
Other Industrial Uses
- Wetting Agent and Surfactant: P204 serves as a raw material for producing wetting agents and surfactants.
- Pharmaceutical and Dye Industries: It is also used in these sectors for specific chemical processes.
Industrial Context
- Battery Material Production: The demand for metals like cobalt and nickel, extracted using P204, has surged due to their role in lithium-ion batteries for electric vehicles and renewable energy storage.
- Sustainability: P204 aids in recovering strategic metals from ores and recycled materials, aligning with global sustainability goals.
Challenges and Innovations
- Technical Barriers: Achieving high selectivity and efficiency in metal extraction requires precise control over process conditions.
- Emerging Applications: Research into advanced alloys and nanomaterials may expand P204’s role in producing next-generation industrial materials.
So, P204 is a versatile and essential extractant in the metallurgical industry, enabling efficient separation of critical metals for high-tech applications while supporting environmental remediation efforts. Its use in battery materials and semiconductor-grade metals underscores its strategic importance in global supply chains.
Our metal extractants as below:
- P204 (D2EHPA or HDEHP) This is used for first step to remove impurity for laterite nickel ore.
- DY319 high efficiency nickel cobalt co-extraction extractant for battery recycle, can take out nickel and cobalt together from Lithium battery electrolyte.
- DY272 Nickel cobalt separation extractant, it can take cobalt out from nickel cobalt solution, then leave pure nickel.
- DY988N/DY973N/DY902/DY5640 copper solvent extraction reagent.
- P507 non-ferrous metal extractant for copper, zinc, cobalt-nickel, cadmium, gold-silver, platinum group metals, rare earths and so on.
- DY377 efficient nickel and diamond separation extractant.
- DY366 Scandium extractant.
- DY316 Lithium extractant.
