Weakly Acidic Cation Exchangers
Resistant and Regenerable Gel-Type Based Resins |
Merck’s weakly acidic cation exchangers are completely resistant to strong alkalis, as well as aliphatic and aromatic solvents. In their H+ form, these gel-type based ion exchanger resins do not split neutral salts. Their ion exchange capacity is effective from pH 6 to 14, and relies on the pH value of the solution to be exchanged. Furthermore, their degree of ionization is comparable to that of acetic acid. For maximum efficiency, weakly acidic ion exchangers can be regenerated through treatment with dilute mineral acid, slightly above the stoichiometric ratio.
Features and Benefits
- Highly resistant to: strong alkalis; aliphatic and aromatic solvents
- Effective from pH 6 to 14
- Ionization degree similar to acetic acid
- Regenerable through dilute mineral acid treatment
Range of Applications
- Purification and isolation of antibiotics, vitamins and alkaloids
- Purification of enzymes
- Determination of di- and higher valent cations
- Adsorption of acidic dye stuffs from acidic solution
Product Information
Product |
Ion exchanger IV |
|---|---|
| Order number | 104835 |
| Functional groups | COO- |
| Counter ion/supplied as | H+ |
| Total ion exchange capacity (mval/mL) | >3.2 |
| Maximum swelling % | 75-100 |
| Max. operating temperature °C | 120 |
| pH range | 4-14 |
| Particle size (mm) (mesh) ASTM |
0.3-1.2 15-50 |
| Moisture content % | 45-55 |
| Bulk density (g/l) | 700 |
| Regenerant Concentration in water % |
HCl 2-3 |
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