Reillex™ Ion Exchange Resins for Metal Recovery

The Reillex™ product line are crosslinked poly-4-vinyl-pyridine resins which are useful for absorption and recovery of soluble metallic species from either aqueous or non-aqueous solutions.  Reillex resins differ from conventional alkylamine type weak-base resins because the thermally and chemically stable pyridine ring is the only functional group present.  Moreover, the unique structure of Reillex resins results in other desirable properties such as a tough bead form, high porosity, and exceptionally high capacity. 

Applications

Reillex™ resins are particularly effective for concentrating dilute solutions of precious metals. Reillex™ 425 polymer is recommended for noble metal extraction from ores and wastes, the separation of precious metals from base metals, and the recovery of spent catalysts. The absorbed metals can be eluted from the column with a solution of thiourea. Alternatively, the resin can be burned to leave the metal in a very pure and concentrated form.

Reillex™ resins adsorb metal ions from neutral aqueous or nonaqueous solution through the formation of coordination complexes. The strength of the complex depends on the particular metal ion involved, the solvent, and the other species present in solution. In some cases, metals can be separated based on differences in the strength of their coordination complexes. 

Reillex™ polymers function as weak base anion exchange resins in acidic solutions.  In the protonated form,  Reillex™ resins adsorbs metals that are present as negatively charged complexes. Regeneration is usually accomplished by neutralizing the anionic complex with base.

Toxic chromic acid wastes from industrial cooling towers and electroplating operations are a major pollution problem. Chromate levels can be reduced by using a column of Reillex™ 425 resin. The chromates are stripped from the column by 5% aq. NaOH.  

Benefits

Benefits

Available Grades

Solution
Appearance
Weak Base (eq/Kg)
Strong Base (eq/Kg)
Bulk Density (Kg/ft3)
Average Pore Size
Maximum Temperature (°C, air/N2)
Use
Reillex™ Polymer 402
granular powder
8.0 (dry)
N/A
___
N/A
180/220
powder formulations, stirred tank reactor
Reillex™ Polymer 425
spherical beads
6.0 (dry), 1.7 (wet)
N/A
18.5
450
180/220
column, cartridge
Reillex™ Polymer HP
spherical beads
6.0 (dry), 1.7 (wet)
N/A
18.5
600
180/220
column, cartridge
Reillex™ Polymer HPQ
spherical beads
N/A
4 (dry, min)
18.5
600
180/220
column, cartridge

Reillex™ 402 is a poly(4-vinylpyridine) crosslinked with 2% divinylbenzene. It is weak base resin in granular form, used to scavenge acids or metals from stirred batch reactions.  

Reillex™ 425 and Reillex™ HP are chemically equivalent – they both are poly(4-vinylpyridine) crosslinked with 25% divinylbenzene to create a macroporous bead and are used in column applications. The Reillex™ 425 is recommended when lower pressure drops are wanted. The Reillex™ HP has a smaller particle size distribution and is used when faster absorption rates into the bead are needed.  

The Reillex™ HPQ is the methyl quaternized version of Reillex™ HP. It is a strong base anion exchange resin used in columns. 

Reillex™ 402 is a poly(4-vinylpyridine) crosslinked with 2% divinylbenzene. It is weak base resin in granular form, used to scavenge acids or metals from stirred batch reactions.  

Reillex™ 425 and Reillex™ HP are chemically equivalent – they both are poly(4-vinylpyridine) crosslinked with 25% divinylbenzene to create a macroporous bead and are used in column applications. The Reillex™ 425 is recommended when lower pressure drops are wanted. The Reillex™ HP has a smaller particle size distribution and is used when faster absorption rates into the bead are needed.  

The Reillex™ HPQ is the methyl quaternized version of Reillex™ HP. It is a strong base anion exchange resin used in columns. 

Reillex™ Ion Exchange Resins For Metal Recovery

Discover performanceproperties in metal recovery applications.   

Reillex™ Data Sheet

Compare our Reillex™ Resins. 
Stable. Durable. Unique. 

Additional Resources

Available upon request. Please use the Contact Us form. 

Available upon request. Please use the Contact Us form. 

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