TFI-CLS837 is a chelating resin featuring dual phosphonic and sulfonic acid functional groups. Thanks to its well-balanced content of phosphonic and sulfonic groups, this resin possesses both classic cation exchange and complexing properties.

TFI-CLS837 is designed for the selective sorption of metals having trivalent (3+) and higher valencies from solutions with high acidity, including rare earth elements, actinides, and molybdenum. It is especially useful for selective ferric iron (Fe³⁺) removal from electrolytes of metals such as copper, nickel, and cobalt.

• High Physical Stability: Excellent resistance to osmotic shock and outstanding mechanical strength, resulting in a low wear rate and minimal annual top-up.
• Selective High-Valency Sorption: Superior affinity for metals with valencies of (3+) or higher, even in strongly acidic solution environments.
• High Sorption Capacity: Provides larger treated volumes per operational cycle and consistent, stable sorption performance.