Foconsci’s Diisooctylphosphinic acid (Cyanex 272) is an acidic organophosphorus extractant mainly used to separate cobalt from nickel in hydrometallurgical processes.

Структурная формула:

• Core Uses:Cobalt-nickel separation extractant for hydrometallurgy. Cyanex 272 selectively extracts cobalt from acidic leachate to achieve efficient Co/Ni separation for the production of high-purity cobalt salts and metallic cobalt. It can also be applied in extraction and recovery of other non-ferrous metals.
• Преимущества:High selectivity, good phase separation, low water solubility and excellent chemical stability.

View more Foconsci’s Metal Extraction Products Series

Технические характеристики изделия

Applications of Diisooctylphosphinic acid (Cyanex 272)

Разделение кобальта и никеля: Diisooctylphosphinic acid selectively extracts cobalt from solutions containing nickel. Cyanex 272 is used in cobalt refining to separate the two metals and prepare higher-purity cobalt solutions.

Lithium-Ion Battery Recycling: After spent NCM and other cobalt-containing battery materials are leached, Cyanex 272 can separate cobalt from nickel-containing sulfate solutions. The loaded organic phase can then be stripped to recover cobalt for further refining.

Cobalt Hydrometallurgy: Cyanex 272 extractant can treat cobalt-bearing sulfate and chloride liquors from ores, concentrates and secondary metal materials.

Rare-Earth and Other Metal Separation: Diisooctylphosphinic acid can also extract selected rare-earth and metal ions such as Ga, In, Mo, Ge, and Zr.

Comparison of Co/Ni Separation Extractants: Cyanex 272 vs. P507 vs. P204

Compared to P507 and P204, Cyanex 272 exhibits higher selectivity:

• P204 (D2EHPA) has the strongest acidity. It usually starts to extract Co at a lower pH value. But it also extracts Ni more easily at the same time. So its Co/Ni selectivity is relatively low.
• P507 (HEHEHP / PC-88A) sits in the middle. It is less acidic than P204. It co-extracts less Ni. So its Co/Ni separation performance is much better than P204. However, its selectivity for Co and Ni is still not as good as Cyanex 272.
• Цианекс 272 has the weakest acidity. It needs a relatively higher pH to extract Co effectively. Within a suitable pH range, Co can be well extracted, while most Ni stays in the aqueous phase. Therefore, it has the highest Co/Ni separation selectivity.