Chelating Resin - High Efficiency Metal Ion Removal with Chelex 100 Resin

Macroporous Styrene Chelating Resin CH520

Macroporous Styrene Chelating Resin CH520

CH520 macroporous styrene chelating resin is a cation exchange tree with a phosphoramidite functional group. This resin is basically chelating to all divalent metal ions, especially for alkaline earth metals with special selectivity. CH520 is an ideal resin suitable for salt water softening. It can be used to remove divalent metal cations from industrial wastewater and other industrial water. CH520 is mainly used for refining secondary brine in the process of making caustic soda by ion membrane method. It can reduce calcium and magnesium ions in secondary brine to 20 ppb, and resin exchange Both capacity and mechanical strength are better than similar aminolin acid resins abroad. In addition, D418 can also be used for the recovery of heavy metals in electroplating wastewater.

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Product Description

Index

Name	Specification
Appearance	Pale yellow opaque spherical beads
Ionic Form	Na⁺
Weight Exchange Capacity	≥4.5mmol/g
Volume Exchange Capacity	≥1.9mmol/ml
Real Density (g/ml）	1.10~1.18g/ml
Bulk Density (g/ml)	0.70~0.80g/ml
Water Retention Capacity	55%~65%
Particle Size Range	0.315~1.25 mm≥95
Uniformity Coefficient	≤1.6
Whole Bead Count（%）	≥95%

Precautions

Resin should be wet state preservation. The best temperature is above 0℃. Resin should be put into a closed space or add in salt water of 5% or above if not used for a long time.Should be anti-freezing during transportation. Do not place heavy objects on the resin in case being crashed.

Generally requires alkali- water - acid - water flow path for processing. Strict requirement needs three circulation before coming to final ion kenel.

Need to consider different transformation expansion rate to set aside enough space to prevent resin overflow and ensure the appropriate liquid level height; Column diameter ratio should be within a reasonable range and avoid bias current; Use wet packed column or back-flushing to wash away bubbles inside resin layer.

Before liquid going into the resin column, steps as flocculation, filtration, or sand-filtration should be taken so that it doesn’t jam resin pore with suspended solids .

Resin inside the column that hasn’t been used for a long time should be storaged outside of the column after washing, or adding salt water in the salt resistant medium while keeping liquid level not dehydrated with usual backwashing to loosen resin in case of agglomeration.

Macroporous Styrene Chelating Resin CH520 FAQ

What is CH520 resin used for?

CH520 is used for selective removal and recovery of heavy metals such as copper, nickel, cobalt, and zinc from industrial wastewater and process streams.

What type of resin is CH520?

It is a macroporous styrene-based chelating resin with aminomethyl phosphonic acid functional groups.

What are the main features of CH520 resin?

CH520 offers high mechanical strength, excellent chemical stability, and strong affinity for transition metal ions.

In which industries is CH520 commonly applied?

It is widely used in electroplating, mining, metal finishing, and environmental wastewater treatment.

How is CH520 resin regenerated?

Regeneration is typically done using acid solutions such as hydrochloric or sulfuric acid to release captured metal ions.

What advantages does CH520 offer over other chelating resins?

CH520 provides high selectivity, fast kinetics, and durability in harsh chemical environments.