PANDA516S Macroporous Polystyrene Thiol Chelating Resin
PANDA516S is a professional macroporous polystyrene thiol-based chelating resin developed for selective purification and recovery of heavy and scattered metal ions. With unique thiol functional groups, it provides stable adsorption performance for tin, bismuth and tellurium hydrometallurgical applications.
The resin is designed for fine impurity removal and resource enrichment from complex mineral refining solutions, supporting selective separation of target metals from interfering heavy metal ions under neutral to alkaline process conditions.
Application Scope
PANDA516S is specifically applied to tin, bismuth and tellurium hydrometallurgical processing systems. Its thiol chelating groups provide selective adsorption capability for targeted scattered metals while reducing interference from coexisting metal ions.
The resin is mainly used in mineral refining processes requiring high selectivity, stable adsorption performance and effective impurity control.
Tin Hydrometallurgy
Tin purification is one of the core application areas of PANDA516S. The resin selectively adsorbs tin ions from leachate and electrolyte streams while removing interfering heavy metal impurities that may affect tin product quality.
Its stable chelating performance helps maintain refined tin solution quality, reduce contamination problems and support high-purity tin material production.
Bismuth Recovery
PANDA516S exhibits strong affinity for bismuth ions in multi-metal associated ore leachate. It separates bismuth from coexisting base metals, enabling enrichment and purification of low-concentration bismuth resources.
The selective adsorption capability helps improve recovery efficiency of bismuth resources from complex smelting systems and associated mineral streams.
Tellurium Recovery
Tellurium recovery is a secondary application area of PANDA516S. In tellurium-containing smelting tail liquid and associated rare mineral leachate, the thiol functional groups capture tellurium ions and assist in removing miscellaneous metal impurities.
Although tellurium process streams generally have lower concentration and narrower industrial coverage, PANDA516S supports tellurium enrichment and resource recycling in fine purification processes.
Mechanism
PANDA516S utilizes high-activity thiol (sulfhydryl) functional groups to selectively coordinate and bind heavy and scattered metal ions from hydrometallurgical solutions.
The rigid macroporous polystyrene structure provides stable diffusion channels, enabling effective ion transport and maintaining adsorption performance during repeated regeneration cycles.
Its sulfur-containing chelating structure provides specific affinity toward tin, bismuth and tellurium ions, supporting selective separation from complex mineral solutions.
Physicochemical Properties
PANDA516S features a rigid macroporous polystyrene backbone with high-activity thiol chelating groups. Supplied in hydrogen (H) ionic form, the resin appears as uniform spherical particles with excellent mechanical stability.
The resin provides low water retention, stable density parameters, fast ion diffusion kinetics and strong metal-binding capability. It maintains reliable adsorption performance under conventional hydrometallurgical temperature and pH fluctuations.
Specifications
| Parameter | Specification |
|---|---|
| CAS Number | 63182-08-1 |
| Functional Group | Thiol (Sulfhydryl) Chelating Group |
| Volume Exchange Capacity (Hg²⁺) | ≥0.8 mmol/ml |
| Water Retention | 45–50% |
| Bulk Density | 0.72–0.78 g/ml |
| Specific Density | 1.02–1.08 g/ml |
| Particle Size | 0.4–1.25mm ≥95% |
| Osmotic-Attrited Spherical Ratio | ≥90% |
| Ionic Form Supplied | Hydrogen (H) |
| Max Operating Temperature | 80℃ |
| pH Operating Range | 5–12 |
| International Equivalents | Resintech SIR-200, Ionac SR-4, Purolite S920, Lewatit TP 214 |
Storage & Handling
Store PANDA516S in a cool, dry and ventilated warehouse. Avoid freezing, high temperature and direct sunlight to prevent structural aging and capacity attenuation.
Keep the resin moist during storage and transportation. For industrial regeneration, use 10–12 mol/L HCl solution with a solution-to-resin volume ratio of 2–3:1 to achieve effective elution and stable cyclic operation.
All adsorption and regeneration operations should be maintained within the pH range of 5–12 to preserve selective adsorption performance.
Advantages / Limitations
Advantages
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High selectivity for tin, bismuth and tellurium recovery.
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Effective impurity removal from complex hydrometallurgical solutions.
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Stable mechanical strength and long-cycle regeneration capability.
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Wide pH adaptability for conventional mineral refining conditions.
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Cost-effective alternative to mainstream imported thiol chelating resins.
Limitations
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Adsorption performance decreases significantly in strongly acidic environments.
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Requires standardized hydrochloric acid regeneration procedures.
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Operating conditions must be controlled to maintain long-term resin performance.
Summary
PANDA516S is a high-performance macroporous thiol chelating resin designed for tin, bismuth and tellurium hydrometallurgical purification. With selective metal adsorption capability and stable physicochemical properties, it supports fine impurity removal and resource enrichment in scattered metal recovery systems.
Compatible with mainstream imported thiol chelating resin equivalents, PANDA516S provides a reliable solution for selective separation and recovery in tin, bismuth and tellurium processing applications.
Macroporous Styrene-Based Thiol Chelating Resin – FAQ
Q1. What is the adsorption capacity of Macroporous Thiol Resin for tin recovery from acidic tin leaching solutions?
Macroporous Styrene-Based Thiol Chelating Resin is designed for selective recovery of soft metal ions such as tin through the interaction between thiol functional groups and target metal species. The practical adsorption capacity depends on tin concentration, solution acidity, competing ions, resin structure, and operating conditions. Laboratory batch adsorption tests and dynamic column experiments are commonly used to evaluate working capacity and breakthrough behavior. For tin hydrometallurgical applications, factors including adsorption kinetics, regeneration efficiency, and impurity tolerance should be considered together when selecting resin operating conditions.
Q2. How does sulfur contamination affect Thiol Resin performance in high-sulfur bismuth leaching solutions?
Sulfur-containing species may influence resin performance depending on their chemical form, concentration, and interaction with metal ions in the leaching solution. In high-sulfur bismuth systems, sulfur-related compounds can affect adsorption selectivity, diffusion behavior, or regeneration efficiency. Proper feed solution evaluation, including sulfur species analysis and impurity assessment, is recommended before industrial application. Pretreatment methods and optimized regeneration procedures can help reduce potential fouling effects and maintain stable adsorption performance during repeated operating cycles.
Q3. How selective is Thiol Resin for tellurium recovery from complex tellurium leaching solutions?
Thiol Resin provides selective coordination sites that can interact with certain metal species, making it suitable for investigating the recovery of valuable metals from complex hydrometallurgical solutions. The selectivity toward tellurium depends on solution chemistry, oxidation state, pH conditions, competing ions, and the presence of impurities such as arsenic or iron. Column testing under actual leach conditions is recommended to evaluate adsorption selectivity, breakthrough characteristics, and regeneration performance before process design. Resin selection should be based on both metal recovery targets and overall purification requirements.
Q4. How does pH variation affect the adsorption kinetics of Thiol Resin in tin recovery applications?
Solution pH is an important parameter affecting metal speciation, resin functional group activity, and adsorption kinetics. In tin recovery processes, changes in acidity may influence the interaction between tin species and thiol functional groups, as well as the competition from other dissolved metals. Optimizing pH conditions through laboratory testing helps determine suitable adsorption efficiency, resin stability, and regeneration requirements. Dynamic column experiments are also recommended to confirm performance under continuous operating conditions commonly used in hydrometallurgical recovery systems.
Q5. How does Thiol Resin compare with activated carbon in tin recovery processes?
Thiol Resin and activated carbon have different adsorption mechanisms and application characteristics. Activated carbon is widely used for adsorption based on surface interactions, while thiol-functionalized resin provides specific coordination sites designed for selective metal recovery. In tin hydrometallurgical processes, the suitable choice depends on feed composition, target metal concentration, impurity levels, and required product purity. In some process designs, resin adsorption may complement other recovery technologies rather than directly replace activated carbon. Comparative testing under actual solution conditions is recommended for process evaluation.
Q6. What factors influence the regeneration efficiency of Thiol Resin after tin, bismuth, or tellurium adsorption?
Regeneration efficiency of Macroporous Styrene-Based Thiol Resin depends on the strength of metal-thiol interactions, desorption reagent type, reagent concentration, contact time, and resin condition after operation. For certain applications, sulfur-containing desorption systems such as thiourea-based solutions may be evaluated to release adsorbed metals effectively. Multiple adsorption-desorption cycle tests are recommended to verify resin stability, capacity retention, and long-term operating performance. Proper regeneration optimization helps improve resin utilization and supports continuous metal recovery processes.
Q7. How do iron ions affect the adsorption selectivity of Thiol Resin in tin leaching solutions?
Iron ions are common impurities in mineral leaching systems and may influence resin performance through competitive adsorption, complex formation, or changes in solution chemistry. The degree of interference depends on iron concentration, oxidation state, pH conditions, and the presence of other dissolved species. For tin recovery applications, impurity evaluation and selective adsorption testing are important steps in process development. Proper control of feed chemistry can help improve target metal recovery while reducing unnecessary resin loading by unwanted components.
Q8. How do flow rate and breakthrough curves affect Thiol Resin column design for metal recovery?
Flow rate directly influences residence time, mass transfer efficiency, and the shape of breakthrough curves in fixed-bed resin systems. A higher flow rate may reduce contact time between the leach solution and resin particles, while a lower flow rate generally improves adsorption utilization. Breakthrough curve analysis helps determine suitable column height, operating capacity, and regeneration intervals. For tin, bismuth, and tellurium recovery applications, dynamic column testing under representative feed conditions is recommended to optimize process parameters and ensure stable operation.
Q9. What storage conditions are recommended to maintain the activity of Thiol Resin?
Proper storage is important for maintaining the adsorption performance and physical stability of Macroporous Styrene-Based Thiol Chelating Resin. The resin should be protected from excessive drying, extreme temperatures, direct sunlight, and chemical contamination during storage. Maintaining suitable moisture conditions helps preserve resin structure and swelling characteristics. Before use after extended storage, resin conditioning and performance verification through adsorption testing are recommended to confirm that the material meets process requirements for metal recovery applications.
Q10. How does oxidation residue in bismuth or tellurium leaching solutions affect Thiol Resin stability?
Oxidizing agents remaining in leaching solutions may affect thiol functional groups depending on oxidant type, concentration, exposure time, and operating temperature. Excessive oxidation conditions may reduce functional group activity and influence long-term adsorption performance. For bismuth and tellurium recovery systems, oxidation control and compatibility testing are recommended before applying Thiol Resin in continuous operation. Evaluating resin performance through cycling tests helps determine suitable operating limits and supports reliable long-term use in hydrometallurgical processes.