Direct Lithium Extraction (DLE) technologies are rapidly evolving, and adsorbent materials play a critical role in determining efficiency and scalability. Among them, G-200 lithium adsorbent and G-300 lithium adsorbent are advanced titanium-based sorbents designed for high performance in brine processing. To obtain reliable laboratory results that reflect real industrial conditions, it is essential to follow the correct testing procedure.
This article highlights the key steps and precautions for lithium extraction testing with G-200 and G-300.
1. Proper Storage of Samples
Before use, G-200 and G-300 should be stored in a dry environment. As both products contain lithium, the first step prior to testing is delithiation (activation). If the material has already been activated but cannot be used immediately, it must be stored in brine solution to maintain stability. Keep in mind that re-activation will be required before reuse.
2. Activation (Delithiation)
Activation is the most crucial preparation step:
-
Duration: 36–48 hours
-
Acid type: 20–30% hydrochloric acid (HCl) or sulfuric acid (H₂SO₄)
-
pH control: Adjust by dropwise addition, maintaining pH between 1.5–1.8
-
Completion check: After stopping acid addition, pH should not rise more than 0.05 within 10 minutes
This ensures lithium ions are fully removed from the adsorbent and the material is ready for adsorption.
3. Adsorption (Lithium Uptake)
In laboratory tests, adsorption can be carried out at room temperature.
-
Duration: Approximately 4 hours
-
Key point: Adsorption must follow immediately after activation.
-
Critical note: After adsorption, the process should transition directly to desorption. Otherwise, lithium may diffuse into the deeper pores of the sorbent, requiring more time and energy during desorption.
By following these steps, researchers can ensure results that better simulate real industrial conditions.
4. Desorption (Lithium Release)
Desorption conditions are similar to activation but typically shorter:
-
Temperature: 40–50 °C, using a controlled water bath for optimal results
-
Duration: Around 1 hour
-
pH control: Maintain 1.5–1.8 with dropwise acid addition
-
End point: Same as activation, when pH remains stable for 10 minutes
Desorption directly after adsorption ensures high lithium recovery efficiency and minimizes material stress.
5. Engineering Cycle Simulation
To reflect real production processes, laboratory tests should simulate the cyclic workflow used in industrial operations:
Activation → Adsorption → Water Wash → Desorption → Water Wash → Next Adsorption
This cycle allows for more realistic evaluation of sorbent performance, including adsorption capacity, stability, and regeneration efficiency over multiple runs.
Conclusion
When working with G-200 lithium adsorbent and G-300 lithium adsorbent, reliable results come from following precise steps. From proper sample storage to careful activation, immediate adsorption, and controlled desorption, each stage plays a critical role in achieving reproducible data.
By simulating real industrial cycles, laboratory lithium extraction testing not only validates material performance but also provides engineers and researchers with insights into scalability and long-term stability.
For more details on technical data sheets, product availability, or customized testing support, please contact our team.