2-asidi ya fosforasi ethylhexyl mono-2-ethylhexyl ester

2-asidi ya fosforasi ethylhexyl mono-2-ethylhexyl ester (widely known in the global hydrometallurgical industry as P507, PC-88A, SME 418, au HEHEHP) is an advanced acidic organophosphorus solvent extraction (SX) reagent.

This phosphonic acid monoester features an unsymmetrical chemical structure that balances strong metal-complexing power with exceptional selectivity, making it the foundational chemical engine for rare earth element (Ree) separation and high-purity battery metal refining.

2-asidi ya fosforasi ya ethylhexyl mono-2-ethylhexyl ester pia inaitwa P507, Vigezo vya kiufundi kama ilivyo hapo chini:

Nambari ya CAS.：14802-03-0
Fomula ya molekuli: Kipimo cha C16H35O3P
Uzito wa Masi: 306.427
Nambari ya EINECS: 238-865-3
Msongamano: 0.95 g/ml
Shinikizo la mvuke: 0.085Zaidi na 25 ℃
Kielezo cha refractive: 1.4400-1.4460
Kiwango cha kumweka>100 °C
Masharti ya kuhifadhi: Hifadhi chini ya +30 ° C
Umumunyifu: mumunyifu katika toluini na ethanoli
Fomu: Kioevu cha uwazi
Mgawo wa asidi (pKa): 3.1 [saa 20 ℃] Rangi: isiyo na rangi hadi manjano hafifu hadi rangi ya chungwa nyepesi
thamani ya PH: 2.3 (10g/l, H2O, 20 °C) (kama emulsion)
Umumunyifu wa maji: 5.95 μ g/L kwa 20 ℃
Kuchemka>180 °C (1013hPa) hutengana

Core Industrial Applications

A. Advanced Rare Earth Element (Ree) Fractionation

In lanthanide metallurgy, separating adjacent rare earth elements (such as Neodymium/Praseodymium or Samarium/Gadolinium) is incredibly challenging due to the “Contraction ya Lanthanide,” which gives these elements nearly identical ionic radii.

• The P507 Advantage: 2-ethylhexyl phosphoric acid mono-2-ethylhexyl ester exhibits significantly higher separation factors for these adjacent elements compared to standard D2EHPA. It is utilized in massive, multi-stage mixer-settler cascades to achieve product purities exceeding 99.99%.

B. High-Purity Cobalt-Nickel Separation

For electric vehicle (EV) battery chemistry supply chains, isolating cobalt (Co ion) cleanly away from vast nickel (Ni ion) background matrixes is critical.

• At a precisely maintained acidic operational window (pH 4.0–5.0), this reagent forms stable, oil-soluble chelates with cobalt ions, leaving nickel fully rejected in the aqueous raffinate stream.

Operational Advantages & Challenges

Key Benefits:

• High Hydrophobicity: Its dual 2-ethylhexyl branched alkyl chains ensure exceptionally low water solubility (0.05 g/L), minimizing organic entrainment losses into processing raffinate solutions.

• Efficient Stripping Kinetics: Because its metal-complexation forces are thermodynamically milder than phosphinic alternatives (like DY272), stripping the loaded metals out of the organic phase requires lower concentrations of hydrochloric or sulfuric acid, cutting down chemical operating costs.

• Carrier Miscibility: Completely miscible with standard aliphatic and low-aromatic hydrocarbon diluents (N.k., Escaid 110, 260# mafuta ya kutengenezea).

Kwa njia, uchimbaji wetu wa chuma kama ilivyo hapo chini, kama unahitaji, tafadhali jisikie huru kutuuliza:

1. P204 (D2EHPA au HDEHP) Hii inatumika kwa hatua ya kwanza kuondoa uchafu kwa ore ya nikeli ya baadaye.
2. P507 uchimbaji wa chuma usio na feri kwa shaba, zinki, cobalt-nickel, kadimiamu, dhahabu-fedha, metali za kundi la platinamu, ardhi adimu na kadhalika.
3. DY272 Dondoo ya kutenganisha nikeli kobalti, inaweza kuchukua cobalt kutoka kwa suluhisho la nikeli ya cobalt, kisha acha nikeli safi.
4. DY984N reagent ya uchimbaji wa kutengenezea shaba.
5. QL256-2 Nickel Cobalt Manganese ushirikiano uchimbaji Extractant.
6. DY316 Mchimbaji wa lithiamu.
7. DY319 kichimbaji chenye ufanisi wa juu cha nikeli kobalti kwa ajili ya kuchakata betri, inaweza kutoa nikeli na kobalti pamoja kutoka kwa elektroliti ya betri ya Lithium.
8. DY366 Mchimbaji wa Scandium.
9. DY377 dondoo bora ya nikeli na almasi kutenganisha.