Reillex™ Ion Exchange Resins

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

Precious Metals Recovery

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.

Metal Catalyst Recovery from Reaction Mixtures 

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 the solution. In some cases, metals can be separated based on differences in the strength of their coordination complexes. 

Metal Compounds Separation and Purification

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

Chromic Acid Waste Processing

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.  

Features

Features

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™
for Metal Recovery

Discover Reillex performance and properties in metal recovery applications   

Reillex™
for Metal Catalysts

Learn how Reillex provides high temperature resistance and
oxidative stability as a
metal catalyst support

Reillex™
as Polymeric Reagents

Discover the benefits of Reillex™ resins as catalysts & reagents in organic synthesis. 

Reillex™
for Pollution Control

Learn how the adsorption properties of Reillex are used for pollution abatement and resource recovery

How to Use
Reillex™ Resins

Our unique Reillex resins
provide benefits in a variety of industrial and pharmaceutical 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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