Anwendungen des P204 D2EHPA-Extraktionsmittels

P204 D2EHPA-Extraktionsmittel (Di-2-ethylhexylphosphorsäure) ist ein weit verbreitetes saures Organophosphor-Extraktionsmittel, spielen eine entscheidende Rolle in der Hydrometallurgie, Wiederaufbereitung von Kernbrennstoffen, rare earth element separation, and wastewater treatment.

Its main applications and characteristics are as follows:

1. Metal Extraction in Hydrometallurgy

D2EHPA is a cation exchange extractant that effectively extracts various metal cations, particularly suitable for the extraction and separation of the following metals:

• Rare Earth Elements (Rees):

P204 D2EHPA extractant can selectively extract light rare earth elements (such as La, Ce, Pr, and Nd) from sulfuric acid or chloride systems, often used for the fractional separation of mixed rare earth elements. Selective extraction of different rare earth elements can be achieved by adjusting the pH of the aqueous phase.

• Uranium (U) and Thorium (Th):

In the nuclear industry, D2EHPA can be used to recover uranium and thorium from acidic leaching solutions, especially in phosphate rock or monazite processing.

• Transition metals such as zinc (Zn), Kobalt (Co), Nickel (In), und Mangan (Mn):

Widely used in zinc smelters for impurity removal from zinc sulfate solutions (Z.B., cadmium and iron removal), and also for cobalt-nickel separation.

2. Nuclear fuel reprocessing: In spent fuel reprocessing processes, D2EHPA can be used to:

• Separate actinides (Z.B., Am, Cm) from high-level radioactive waste;

• Improve separation efficiency when used in conjunction with neutral extractants such as TBP (Tributylphosphat).

3. Environmental engineering and wastewater treatment:

• Remove or recover toxic metal ions (Z.B., Cd²⁺, Pb²⁺, Cu²⁺) from industrial wastewater containing heavy metals (Z.B., electroplating, battery manufacturing wastewater);

• Due to its good selectivity and reversibility, it is suitable for constructing closed-loop recovery systems.

4. Synergistic Effects with Other Extractants
P204 D2EHPA extractant is often used in combination with the following extractants to enhance performance:

• TBP (Tributylphosphat): Inhibits third-phase formation and improves metal loading capacity;

• DY272: Improves selectivity for heavy rare earth elements or cobalt and nickel;

• Kerosene or sulfonated kerosene: Acts as a diluent to adjust viscosity and interfacial tension.

5. Advantages and Disadvantages

Vorteile
Disadvantages
High extraction efficiency for multiple metals
Strong acidity, corrosive to equipment
Selectivity can be adjusted by pH
Easily emulsified, requires the addition of phase modifiers
Kostengünstig, industrially mature
Weak extraction ability for heavy rare earths
Can be back-extracted and regenerated, recyclable
Limited stability in strong acids

6. Typical Process Conditions

• Extraction pH: Typically 1.5–4.0 (depending on the metal);

• Diluent: Sulfonated kerosene or n-dodecane;

• O/A ratio: 1:1 Zu 5:1;

• Back-extraction agent: Commonly 4–6 M HCl or H₂SO₄.

Zusammenfassung
P204 D2EHPA-Extraktionsmittel, due to its high efficiency, economy, and adjustable selectivity, has become one of the most commonly used acidic phosphorus extractants in industrial extraction, especially indispensable in rare earth and non-ferrous metal metallurgy. With the development of green chemistry and resource recycling, its application prospects in high-value metal recovery and environmental protection continue to expand.

Unsere Metallextraktionsmittel siehe unten, wenn Sie irgendeine Art benötigen, Bitte fragen Sie uns:

1. P204 (D2EHPA oder HDEHP) Dies wird als erster Schritt zur Entfernung von Verunreinigungen aus dem Laterit-Nickelerz verwendet.
2. DY319 Hocheffizientes Nickel-Kobalt-Koextraktionsmittel für das Batterierecycling, kann Nickel und Kobalt zusammen aus dem Elektrolyten von Lithiumbatterien entfernen.
3. DY272 Extraktionsmittel zur Nickel-Kobalt-Abtrennung, Es kann Kobalt aus einer Nickel-Kobalt-Lösung entfernen, dann belassen Sie reines Nickel.
4. DY988N/DY973N/DY902/DY5640 Kupfer-Lösungsmittel-Extraktionsreagenz.
5. P507 Nichteisenmetall-Extraktionsmittel für Kupfer, Zink, Kobalt-Nickel, Cadmium, Gold-Silber, Metalle der Platingruppe, Seltene Erden und so weiter.
6. DY377 effizientes Extraktionsmittel zur Nickel- und Diamanttrennung.
7. DY366 Scandium-Extraktionsmittel.
8. DY316 Lithium-Extraktionsmittel.
9. DY-SS-01 Extraktionsmittel für Eisen, Kalzium, Cadmium und Scandium bei unterschiedlichen pH-Werten.