2-asid etilheksil fosforik mono-2-etilheksil ester

2-asid etilheksil fosforik mono-2-etilheksil ester (widely known in the global hydrometallurgical industry as P507, PC-88A, SME 418, atau 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-asid etilheksil fosforik mono-2-etilheksil ester juga dinamakan P507, Spesifikasi Teknikal seperti di bawah:

CAS No.：14802-03-0
Formula molekul: Isomer C16H35O3P
Berat molekul: 306.427
Nombor EINECS: 238-865-3
Ketumpatan: 0.95 g/ml
Tekanan wap: 0.085Lagi dan 25 ℃
Indeks biasan: 1.4400-1.4460
Titik kilat>100 ° C
Keadaan penyimpanan: Simpan di bawah +30 ° C
Keterlarutan: larut dalam toluena dan etanol
Borang: Cecair lutsinar
Pekali keasidan (pKa): 3.1 [di 20 ℃] Warna: tidak berwarna kepada kuning muda kepada jingga muda
nilai PH: 2.3 (10g/l, H2O, 20 ° C) (sebagai emulsi)
Keterlarutan air: 5.95 μ g/L pada 20 ℃
Takat didih>180 ° C (1013hPa) terurai

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 “Penguncupan 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 (Mis., Escaid 110, 260# minyak pelarut).

By the way, pengekstrak logam kami seperti di bawah, jika anda perlukan, sila berasa bebas untuk bertanya kepada kami:

1. P204 (D2EHPA atau HDEHP) Ini digunakan untuk langkah pertama untuk membuang kekotoran untuk bijih nikel laterit.
2. P507 pengekstrak logam bukan ferus untuk kuprum, zink, kobalt-nikel, kadmium, emas Perak, logam kumpulan platinum, nadir bumi dan sebagainya.
3. DY272 Pengekstrak pengasingan kobalt nikel, ia boleh mengeluarkan kobalt daripada larutan nikel kobalt, kemudian tinggalkan nikel tulen.
4. DY984N reagen pengekstrakan pelarut kuprum.
5. QL256-2 Pengekstrakan bersama nikel Kobalt Mangan.
6. DY316 Pengekstrak litium.
7. DY319 pengekstrak bersama nikel kobalt kecekapan tinggi untuk kitar semula bateri, boleh mengeluarkan nikel dan kobalt bersama-sama daripada elektrolit bateri Litium.
8. DY366 Ekstrak skandium.
9. DY377 pengekstrak pemisahan nikel dan berlian yang cekap.