Youcui 936 Lithium Extractant

1. Product Overview

Excellent Selection 936 Extractants are primarily used for extraction under alkaline conditions. Li ⁺ , in order to achieve Li/Na、Li/K Separation and concentration Li ⁺ The objective is to achieve the efficient, low-carbon, comprehensive utilization of lithium resources.

1. Basic Physicochemical Properties 

1. Extraction performance 

Extraction rate -pH Curve

1.  
   1. Basic Extraction Parameters 

1. Excellent Selection 936 The outstanding advantages 
   1. High chemical stability and low water solubility;
   2. High efficiency: Youcui 936 During the extraction and separation of lithium, the phase separation in the extraction and back-extraction processes is rapid, with a phase separation time of in the funnel experiment. 1 min Within;
   3. Adjustable saturation capacity: tailored to the characteristics of the feed solution, Youcui. 936 The saturation capacity is in 1.5 – 2.8 g/L Adjustable range;
   4. Li/Na High separation factor: Youcui 936 to Li ⁺ It exhibits very high selectivity; through processes such as extraction, washing, and back-extraction, the back-extraction solution can be Li ⁺ Concentration reaches 20 g/L The above, Li/Na Concentration ratio greater than 10。
2. Application Fields 
   1. Lithium recovery from lithium-rich mother liquor: The mother liquor used in lithium carbonate production contains approximately 1.5 – 2.0 g/L of lithium, and also contains a large amount Na ⁺ (Generally higher than 80 g/L ), while the concentrations of other metal ions are extremely low. Therefore, the lithium precipitation mother liquor is a high-quality secondary lithium resource with significant recovery value. The conventional method for treating lithium precipitation mother liquor is neutralization. - Evaporation and concentration (chloride system) or neutralization - Evaporation and concentration - Cold crystallization (sulfate system). Due to the low lithium concentration in the lithium-precipitating mother liquor, the evaporation and concentration process is highly energy-intensive, has a long production cycle, and fails to separate sodium ions, resulting in very high sodium content that severely hinders further lithium utilization. The cold crystallization method can precipitate some sodium sulfate, thereby reducing the sodium-to-lithium ratio in the mother liquor; however, it also consumes substantial energy, and the precipitated sodium sulfate contains a significant amount of lithium, leading to a low lithium recovery rate. Youcui 936 The extractant, under alkaline conditions,对 Li ⁺ has a very high extraction rate, while for Na ⁺ The extraction efficiency is very low; by employing extraction, washing, and back-extraction processes, it is possible to achieve Li/Na Its efficient separation and lithium concentration yield a high-concentration lithium salt solution, which can be further used for the production of lithium carbonate, delivering significant economic benefits.
   2. Lithium extraction from carbonate-type brines: The Tibet region is home to unique carbonate-type lithium salt lakes, such as Zabuye, Dangxiong Co, Banggo Co, and Jieze Chaka, which are characterized by low magnesium-to-lithium ratios or virtually no magnesium ions. After concentration, the lithium content is approximately 1.0 – 2.0 g/L , add a small amount of sodium carbonate and sodium hydroxide to this solution to remove Calcium ²⁺ 、 Magnesium ²⁺ Afterward, the solution becomes alkaline and can be treated with Youcui. 936 The extractant, through the processes of extraction, washing, and back-extraction, achieves Li ⁺ the extraction and concentration as well as Li ⁺ and Na ⁺、 K ⁺ of separation.
   3. Lithium Recovery from Spent Lithium-Ion Battery Leachates: With the increasing adoption of new-energy batteries, the volume of end-of-life lithium-ion batteries has been rising year by year. These spent batteries contain substantial amounts of valuable metals, making them high-grade secondary metal resources whose recovery offers significant economic and environmental benefits. Currently, the most widely used types are ternary lithium-ion batteries—whose cathode material is lithium nickel cobalt manganese oxide—and lithium iron phosphate batteries. The typical recycling process for ternary lithium-ion batteries involves disassembly. - Roasting - Acid leaching - Chemical impurity removal - Extraction and impurity removal - The primary metal ions (such as nickel, cobalt, and manganese) are extracted and recovered, leaving behind a tail liquor that is a mixture of lithium sulfate and sodium sulfate, with lithium accounting for approximately 2.0 – 4.5 g/L , which holds significant economic value. The recycling process for lithium iron phosphate batteries primarily involves disassembly. - Roasting - Acid leaching - Chemical impurity removal - In the synthesis of lithium iron phosphate, the final by-product is a mixed solution of lithium sulfate and sodium sulfate. Efficient recovery and separation of lithium from this lithium-sulfate–sodium-sulfate-containing by-product have long been challenging; the conventional approach involves evaporative concentration followed by freeze crystallization, which entails substantial energy consumption and results in low lithium / The sodium separation performance is poor, and the recovery rate is low. Use Youcui. 936 Lithium extractant: By employing extraction, washing, and back-extraction processes, it enables the efficient recovery of lithium at ambient temperature. / Sodium is separated, while lithium is concentrated, yielding a lithium sulfate solution with higher concentration and purity, which can then be further used in the production of lithium carbonate, lithium hydroxide, metallic lithium, and other products.
   4. Lithium Recovery from Lithium-Containing Waste Electrolyte in Aluminum Electrolysis: In aluminum electrolysis, the addition of lithium fluoride and other salt additives to the electrolyte can improve its properties, thereby enhancing current efficiency and reducing energy consumption. Moreover, with the rapid development of the aluminum electrolysis industry, high-grade bauxite resources are being gradually depleted, necessitating the extensive use of low-grade bauxite. Low-grade bauxite typically contains lithium, which accumulates in the electrolytic cells along with the alumina feedstock, leading to elevated lithium concentrations in the electrolyte. These two factors result in waste electrolyte from aluminum smelters having very high lithium content—far exceeding that found in spodumene ore. The primary process for recovering lithium from waste electrolyte in aluminum electrolysis involves dissolving it with sulfuric acid, followed by aluminum precipitation using sodium hydroxide; the resulting aluminum hydroxide is then converted into cryolite. After aluminum precipitation, the residual alkaline solution can contain a significant amount of lithium. 1.5 – 4.0 g/L , is a high-quality lithium resource, utilizing Youcui. 936 Lithium extractant: By employing extraction, washing, and back-extraction processes, it enables the efficient recovery of lithium at ambient temperature. / Sodium is separated, allowing lithium to be concentrated and yielding a lithium sulfate solution with higher concentration and purity, which can then be further used in the production of lithium carbonate, lithium fluoride, lithium hydroxide, or metallic lithium.
   5. Other lithium-containing solutions.