HP160 series products are the latest generation (fourth generation) of high-capacity and high-selectivity aluminum adsorbents for lithium extraction from the salt lake, which have high efficiency adsorption performance for lithium ions, independently researched and developed by Jiangsu Haipu Functional Materials Co. The active ingredient of the adsorbent is LiCl-nAl(OH)3-mH2O, which is granulated into spherical particles by special embedding technology. When working, lithium ions in the form of bare ions into the octahedral cavity within the aluminum hydroxide layer and adsorbed, while chloride ions into the interlayer in order to balance the charge, and ultimately in the form of lithium chloride adsorption enrichment. And the rest of the alkali metal ions with larger radius are not easy to enter the pore due to the spatial site resistance effect, thus realizing the enrichment of lithium ions and the separation of other impurity ions. The lithium ion concentration of the qualified solution can be enriched to more than 1.4g/L, while the concentration of other impurity ions is lower.
(1) The new generation of nanoscale powder pore-making process optimizes the adsorption kinetics and ensures that the adsorbent has abundant nanopore channels and active nanocrystalline grains inside, which substantially increases the lithium diffusion rate. While improving the adsorption capacity, it reduces the effect of temperature on the adsorption efficiency, so that the material can still maintain excellent performance in a low-temperature environment, and the adsorption rate can still be maintained at a high level even under the condition of temperature reduction.
(2) High selectivity, high separation efficiency of lithium ions from sodium, magnesium and other impurity ions. Through one adsorption/desorption, it can realize that the magnesium-lithium ratio can be reduced from more than 600 to less than 1, and the sodium-lithium ratio can be reduced from more than 500 to less than 0.5. Under the same process, the use of less drenching liquid can ensure that the desorption liquid impurity ions to meet the standard, thus significantly improving the efficiency of the adsorbent, increase lithium production, and significantly reduce water consumption.
(3) Spherical granulation, good hydrodynamic flow pattern. At the same time add polymers to make it good anti-scouring performance, stable physical and chemical properties, to ensure that the adsorbent has excellent mechanical strength and toughness, the adsorbent annual dissolution loss rate (performance degradation rate) is less than 5%. Even in the winter low-temperature brine viscosity conditions are not easy to plate, clogging and so on, thus effectively avoiding the frequent shutdown for backwashing operation, to ensure the yield.
(4) Through the nano-doping process, the adsorbent's ability to resist sulfate ion pollution has been comprehensively improved. Effectively overcome the aluminum adsorbent can not adapt to the high concentration of sulfate ion brine, even if the sulfate ion concentration of 40g / L or more of the original brine of the Salt Lake, can ensure the long-term stability of the adsorbent operation.
(5) Lithium resource extraction process is green and environmentally friendly. Only the lithium chloride in the material liquid is extracted during adsorption, and no other chemical elements are introduced into the material liquid after adsorption, which can be directly discharged back to the salt lake or into the next section; only pure water is used during desorption, which is safe and energy-saving.
Parameter | Indicator |
Appearance | Milky white ellipsoidal particles |
Moisture content % | 50.0-60.0 |
Particle size range % | ≥95 |
Wet apparent density g/mL | 0.85-0.95 |
Physical Strength | >99 |
Functional group | Aluminum base |
It is especially suitable for lithium extraction from acidic to neutral (pH4~8) materials, such as old brine of salt lake, raw brine and other lithium-containing materials.
Fast adsorption rate, high adsorption capacity, good selectivity, low-temperature resistance, excellent anti-sulfate performance, annual dissolution loss rate<5%.
Saturated adsorption capacity of 7g/L, the working adsorption capacity when the recovery rate is over 90% is 1.5-5g/L (determined by the lithium concentration of raw materials), the concentration of lithium ions in the desorption of qualified liquid can be enriched to 1g/L or so, and the mass ratio of lithium ions to the main impurity ions (sodium \magnesium) is more than 1.
Micro homogeneous particle adsorbent, in addition to having the performance characteristics of conventional particle size adsorbent, the adsorption rate is higher, more suitable for the scenario of strict water consumption requirements, but the equipment requirements are higher.
Saturated adsorption capacity of 8g/L, working adsorption capacity of 3-6g/L when the recovery rate is above 90%, lithium ion concentration in the desorption qualified liquid can be enriched to above 1g/L, and the mass ratio of lithium ion to the main impurity ion (sodium\magnesium) is above 1.
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