272ExtractorChemical Name:2-(2,4,4-trimethylpentyl) ether*AcidCyanex 272 is an efficient organic phosphorus extractant, widely used in metal separation, nuclear fuel cycle, and rare earth recovery. The following analysis will delve into its chemical properties, production process, application scenarios, and technical advantages, accompanied by practical case studies to illustrate its industrial value.
Cyanex 272 is primarily composed of 85% bis(2,4,4-trimethylpentyl) sulfide.*Acid and 15% tri-(2,4,4-trimethylpentyl)*Base Oxide*Composition. Its molecular structure consists of:*The carboxyl group (-PHOOH) imparts strong coordination ability, allowing it to form stable complexes with various metal ions (such as Co²⁺, Ni²⁺, U⁶⁺, rare earth ions, etc.), achieving efficient selective extraction.
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Physical and Chemical Properties
Extraction performance
(1) Metal Extraction Sequence
Extraction Conditions: 0.5M272, Extraction Agent -260# Solvent Oil, c(M"+)=
0.02M, T=450°C, O/A=1:1, Sulfate root medium, pH Adjuster: Sulfuric Acid, Contact Time: 5 min.
(2) Several organophosphorus/*Acidic Nickel/Cobalt Separation Performance Comparison
Extraction Conditions: 22% v/o Extractant-260# solvent oil; O/A ratio = 1, pH = 5.0, T = 50°C.
From the table above, it can be seen that 272 has a high separation coefficient for nickel/cobalt, requiring fewer stages of extraction for separating Ni and Co, resulting in lower initial investment for equipment and extractants. The resulting nickel salt product has a high purity and is suitable for the purification of nickel.
(3) Non-Calcium Extraction Performance
When the liquid contains Ca2+, P204 and P507 as extractants exhibit strong extraction capacity for calcium, which easily forms calcium scaling during the back-extraction stage. However, 272 has significantly better extraction capabilities for Co²+ and Mn²+ than for Ca, thus preventing scaling of gypsum in the sulfuric acid medium extraction system, reducing emulsification, and consequently minimizing the loss of the extractant.
Application Fields
Technical Advantages
Customized extractants can be formulated based on the composition characteristics of the liquid content and target requirements, along with professional application process and technology guidance.
