PANDA271S Aluminum-Based Lithium Adsorbent | High Selective Li Recovery Sieve

PANDA271S is a high-efficiency aluminum-based lithium ion sieve adsorbent developed for lithium resource separation and recovery. Through lithium ion imprinting and liquid-phase targeted modification technology, it provides selective lithium adsorption performance with stable structural memory and cyclic operating capability.

Designed for salt lake brine lithium extraction and spent lithium battery recycling, PANDA271S supports efficient lithium enrichment from complex solutions while reducing interference from magnesium and other coexisting ions.

Application Scope

PANDA271S is exclusively applied for lithium resource recovery from two specified application fields: salt lake brine extraction and spent lithium-ion battery recycling.

Its aluminum-based lithium ion sieve structure provides targeted adsorption of lithium ions, enabling selective separation in complex aqueous systems.

Salt Lake Brine Lithium Extraction

Salt lake brine lithium extraction is the primary and most mature application of PANDA271S. It is specially optimized for high magnesium-lithium ratio brine systems where conventional separation materials face significant challenges.

The adsorbent maintains lithium-selective adsorption performance under extreme magnesium-lithium ratio conditions and effectively reduces interference from magnesium and other coexisting metal ions.

Through adsorption separation, PANDA271S helps simplify subsequent purification processes by improving lithium enrichment efficiency and reducing the complexity of brine treatment circuits.

With strong scouring resistance and stable physicochemical properties, it supports long-term continuous flow operation in large-scale salt lake lithium production systems.

Spent Lithium Battery Recycling

Spent lithium-ion battery recycling is the secondary application field of PANDA271S. In multi-metal mixed leachate generated from battery waste materials, the adsorbent selectively captures lithium ions from complex impurity systems.

It enables lithium enrichment and separation, providing suitable lithium-containing feed solution for subsequent battery-grade lithium salt production.

The water-regeneration process supports environmentally oriented resource recovery operations with reduced secondary waste generation.

Mechanism

PANDA271S utilizes an aluminum-based lithium ion sieve framework with lithium ion memory structure to achieve selective lithium adsorption.

The modified internal structure provides targeted lithium recognition while limiting adsorption interference from magnesium and other metal ions commonly present in brine and recycling solutions.

During adsorption-desorption cycles, the stable framework maintains lithium selectivity and supports repeated industrial operation.

Physicochemical Properties

PANDA271S adopts a high-stability aluminum-based functional framework with exclusive lithium ion memory structure. It appears as uniform white to milky white spherical particles with physical strength exceeding 99%.

The modified structure provides excellent anti-scouring performance, reducing particle crushing and powder loss during long-cycle fluid washing and adsorption-desorption processes.

It maintains stable lithium selectivity and working capacity in neutral and weakly acidic systems, supporting continuous cyclic operation.

Specifications

Parameter	Specification
CAS Number	21645-51-0
Functional Group	Aluminum-based Lithium Ion Sieve
Appearance	White to Milky White Spherical Particles
Water Content	50.0–60.0%
Particle Size Range	0.5–2mm ≥95%
Wet Bulk Density	0.85–0.95 g/mL
Physical Strength	＞99%
Bed Height	≥600 mm
Operating Flow Rate	2–15 BV/H
Operating pH Range	4–8
Backwash Expansion Rate	50–80%
Max Operating Temperature	≤80℃

Storage & Handling

Store PANDA271S in a cool, dry and ventilated warehouse. Avoid prolonged exposure, moisture contamination and high-temperature drying that may affect the internal lithium ion memory structure.

Keep the adsorbent moist before use to maintain structural activity. During industrial operation, control bed height, flow rate and pH conditions within recommended ranges to ensure stable lithium adsorption performance.

Pure water desorption regeneration can be adopted for cyclic reuse, supporting a cleaner lithium recovery process.

Advantages / Limitations

Advantages

• High selective lithium adsorption performance.

• Suitable for high magnesium-lithium ratio brine separation systems.

• Strong physical strength and anti-scouring capability.

• Supports pure water regeneration and cyclic reuse.

• Provides an efficient material option for lithium resource recovery.

Limitations

• Designed specifically for lithium ion selective adsorption.

• Effective operating range is limited to pH 4–8.

• Extreme temperature and strong acid-base conditions may affect ion sieve activity.

Summary

PANDA271S is a professional aluminum-based lithium ion sieve adsorbent developed for lithium resource recovery. With salt lake brine extraction as the primary application and battery recycling lithium enrichment as a supporting field, it provides selective lithium separation from complex aqueous systems.

Featuring high lithium selectivity, stable mechanical properties and environmentally oriented regeneration performance, PANDA271S provides an effective material solution for modern lithium hydrometallurgical production.

Aluminum-Based Lithium Adsorbent – FAQ

Q1. What is the lithium adsorption capacity of aluminum-based adsorbent in salt lake brine lithium extraction?

Aluminum-based lithium adsorbents are designed to selectively capture lithium ions from salt lake brines through ion exchange and adsorption mechanisms. The actual lithium adsorption capacity depends on factors such as lithium concentration, magnesium-to-lithium ratio, pH, competing ions, temperature, and contact time. Laboratory evaluation using actual brine samples is recommended to determine adsorption capacity, equilibrium behavior, and regeneration performance. These tests help optimize adsorbent dosage, contact time, and operating conditions for industrial salt lake lithium extraction processes.

Q2. How selective is aluminum-based adsorbent for lithium recovery from high magnesium-to-lithium ratio brines?

High magnesium-to-lithium ratio is one of the main challenges in salt lake lithium extraction because magnesium ions can compete with lithium during adsorption. Aluminum-based lithium adsorbents are developed to provide selective lithium uptake while reducing interference from major ions such as magnesium, calcium, and sodium. The separation performance depends on adsorbent structure, surface properties, and brine chemistry. Actual brine testing is necessary to evaluate lithium selectivity, adsorption efficiency, and long-term stability under specific high magnesium conditions.

Q3. How does pH affect the lithium adsorption performance of aluminum-based adsorbent?

Brine pH can influence lithium adsorption behavior by affecting surface charge characteristics, ion exchange equilibrium, and competitive adsorption between lithium and other dissolved ions. Excessive pH variation may change adsorption kinetics and regeneration efficiency. During process development, pH optimization tests are typically performed to evaluate adsorption capacity, equilibrium time, and chemical stability of aluminum-based lithium adsorbent. Maintaining suitable operating pH conditions helps improve process consistency and adsorbent utilization in continuous lithium extraction systems.

Q4. How does aluminum-based adsorbent compare with titanium-based adsorbent for lithium extraction?

Aluminum-based and titanium-based lithium adsorbents have different structural characteristics, adsorption mechanisms, and application conditions. Aluminum-based adsorbents are commonly evaluated for selective lithium recovery from salt lake brines, especially where lithium concentration and magnesium interference require optimized selectivity. Titanium-based adsorbents may show different stability and regeneration characteristics depending on the process environment. The appropriate adsorbent selection should consider brine composition, impurity levels, operating temperature, regeneration requirements, and target lithium recovery performance through laboratory comparison testing.

Q5. How does high calcium and magnesium content affect aluminum-based lithium adsorbent performance?

Calcium and magnesium ions in natural brines may compete with lithium adsorption sites or contribute to scaling and surface fouling during long-term operation. Aluminum-based lithium adsorbent performance under high hardness conditions depends on its structural stability, pore characteristics, and resistance to impurity accumulation. Pretreatment methods such as filtration or chemical conditioning may be considered for challenging brine systems. Pilot testing with actual high calcium-magnesium brine is recommended to evaluate adsorption stability, pressure drop, regeneration efficiency, and operating cycle performance.

Q6. What factors influence the breakthrough behavior of aluminum-based lithium adsorbent columns?

Column breakthrough performance is affected by lithium concentration, brine flow rate, adsorbent particle size, bed height, contact time, and competing ions. A properly designed adsorption column allows efficient utilization of adsorption capacity before breakthrough occurs. Dynamic column tests using real brine conditions are commonly used to determine mass transfer zone behavior, operating flow rates, and regeneration intervals. These evaluation results support the design of stable continuous lithium extraction systems using aluminum-based adsorbents.

Q7. How does particle size affect lithium adsorption efficiency of aluminum-based adsorbent?

Particle size distribution influences lithium diffusion rate, adsorption kinetics, pressure drop, and hydraulic performance in adsorption columns. Smaller particles may provide faster mass transfer because of shorter diffusion paths, while larger particles can improve flow characteristics and reduce resistance in continuous operation. The optimal particle size depends on column design, brine viscosity, flow conditions, and required adsorption efficiency. Laboratory column testing is recommended to balance adsorption performance and operational reliability for specific lithium extraction applications.

Q8. What regeneration methods are used for aluminum-based lithium adsorbent?

Regeneration of aluminum-based lithium adsorbent is an important factor affecting operating cost and long-term performance. Acid washing or other regeneration methods may be applied depending on adsorbent structure and process requirements. The regeneration conditions, including acid concentration, contact time, and washing procedures, should be optimized to restore lithium adsorption capacity while maintaining adsorbent stability. Testing with actual process solutions helps determine suitable regeneration cycles and minimize capacity loss during repeated operation.

Q9. How do impurities and suspended solids affect aluminum-based lithium adsorbent in brine extraction systems?

Suspended solids, organic impurities, and dissolved contaminants in brines may influence adsorbent performance by blocking pores, increasing bed pressure drop, or reducing available adsorption sites. Effective pretreatment and filtration are important for maintaining stable adsorption operation. The impact of impurities depends on the specific brine composition and operating conditions. Compatibility tests with actual lithium brine can help identify potential fouling risks and establish appropriate cleaning and maintenance procedures for aluminum-based lithium adsorbent systems.

Q10. What should be considered when selecting aluminum-based adsorbent for lithium extraction projects?

The selection of aluminum-based lithium adsorbent should consider lithium concentration, magnesium-to-lithium ratio, impurity composition, adsorption capacity, regeneration performance, mechanical strength, and process configuration. Laboratory and pilot-scale testing are important for evaluating adsorption kinetics, breakthrough curves, cycle stability, and chemical compatibility with the target brine. A systematic evaluation helps determine whether aluminum-based adsorbent is suitable for a specific salt lake lithium extraction project and supports reliable process design.