Chelating resins are a special type of ion exchange resin consisting of a polymer matrix in which chelating ligands are attached by covalent bonds. Compared with standard ion exchange resins, chelating resins have higher selectivity and stronger bonding ability, but lower capacity. Chelating resins have special groups that are able to form chelates with specific inorganic ions. The chelating properties of these resins are affected by the nature and number of donor atoms in the chemically active groups, the chemical properties of polymer matrix, steric factors, resin morphology, and adsorption conditions. The accessibility of ligands, steric hindrance effect, stability of complexes, and stoichiometry are all important factors affecting the reaction ability of resins with metal ions in solution. The kinetic properties of resins mainly depend on the diffusion rate of metal ions in the resins and the formation rate of complexes. Chelating ion exchange resins are mainly used for pre-concentration of metal ions in dilute solutions, and are also used for brine purification in the chlor-alkali industry, removal of boron from drinking water, and recovery of precious metals in solutions.
Chelating Resins for Metal Recovery
Compared with other metal recovery technologies, ion exchange method has the advantages of low operation cost, low energy consumption, high selectivity, high efficiency, metal recovery from large volumes of low-concentration solutions, and simple equipment. In addition, ion exchange resins can be regenerated and reused, thereby extending the life of the bed and equipment. Amerigo Scientific offers a wide range of chelating resins for metal recovery.
|
Product |
Type |
Application |
|
LSC772
|
Macroporous polystyrene resin with C272 loaded |
Cobalt Recovery |
|
LSC660
|
Macroporous anion resin with guanidine functional groups |
Gold Recovery
|
|
LSC485
|
Chelating resin with hydroxypropyl-picolylamine function group |
Nickel Recovery |
|
LSC770
|
Macroporous polystyrene weak base anion resin |
Rhenium or Molybdenum Recovery |
|
LSC790
|
Macroporous crosslinked polystyrene resin impregnated with D2EHPA |
Scandium/Zinc Recovery |
|
LSC788
|
Strong base anion resin with quaternary ammonium active group |
Uranium Recovery |
Chelating Resins for Metal Removal
Amerigo Scientific offers high-quality chelating resins that are highly selective to target metal cations and can be used to remove metal ions from solutions.
|
Product |
Introduction |
Application |
|
LAR714
|
High arsenic selectivity resin |
Arsenic Removal |
|
LSC780
|
Macroporous polystyrene chelating resin with N-Methylglucamine |
Boron Removal |
|
LSC760
|
Amino phosphonic acid chelating resin (Al form) |
Fluoride Removal |
|
LSC720
|
Macroporous polystyrene based, thiouronium chelating resin |
Heavy Metals Removal |
|
LSC730
|
Monophosphonic chelating resin |
Iron Removal |
|
LSC724
|
Macroporous polystyrene based, thiourea chelating resin |
Mercury Removal |
|
LSC740
|
Macroporous polystyrene based, thiol chelating resin |
Mercury Removal |
|
LSC743
|
Macroporous polystyrene based, thiol chelating resin |
Mercury Removal |
|
LSC718
|
Barium salt impregnated resin |
Radium Removal |
Chelating Resins for Brine Purification
The brine of alkali metal chloride electrolysis by membrane process requires a certain purity standard. Amerigo Scientific provides SEPLITE® aminomethyl phosphoric acid (AMPA) resins and iminodiacetate (IDA) resins that are effective at removing alkaline earth metals to the lower ppb range and making brine suitable for membrane electrolysis.
|
Product |
Functional Group |
Total Capacity (eq/L) |
Particle size (mm) |
Uniformity Coefficient |
Application |
| LSC750
|
Amino phosphoric acid |
≥ 2.4 (H form) |
0.4-1.0 |
<1.6 |
Preparation of secondary brine in ion exchange membrane caustic soda, hydrometallurgy |
| LSC7500
|
Amino phosphoric acid |
≥ 2.5 (H form) |
0.60±0.05 |
≤1.1 |
| LSC770
|
Iminodiacetic acid |
1.3 (H form) |
0.6-1.5 |
≤1.6 |
Selective adsorption of alkaline earth cations in chlor alkali industry |
| LSC7100
|
Iminodiacetic acid |
≥ 2.5 (H form) |
0.60±0.05 |
≤1.1 |
| LSC7105
|
Iminodiacetic acid |
≥ 2.5 (H form) |
0.50±0.05 |
<1.15 |
Characteristics
- Good resistance to osmotic shock
- High resistance to wear and penetrate, low wastage rate, <5% annual supplement, stable kinetic performance
- High chelating capacity
- High operating capacity for the removal of ions, resulting in long cycle times
.
