ALDEX CSR Series
Chromatographic Separation Resins
Aldex CSR Series resins (CSR-1, CSR-2 and CSR-3) are gel-type, strong acid cation resins supplied in the Calcium ion (Ca2+) form. They are specially designed as a universal media for the physical separation of ingredients for the food and beverage industry and are primarily used in simulated moving bed (SMB) chromatographic systems for the recovery and purification high fructose corn syrup (HFCS) and high-purity fructose.
Download Aldex CSR Series resin Technical Bulletin (PDF)
Download Aldex CSR Series resin Cut Sheet (PDF)
Physical Chemical Properties
| Resin Composition: | Gel styrene / divinylbenzene copolymer |
| Functional Group: | Sulfonic acid |
| Ionic Form as Shipped: | Calcium ion |
| Physical Form: | Amber, translucent, spherical beads |
| Total Capacity (H+ form): | ≥ 1.4 eq/L |
| Moisture Content (H+ form): | 60 to 64% |
| Particle Density: | 1.27g/ml |
Recommended Operating Conditions
| Syrup Temperature (Ca2+ form): | 140 to 160ºF |
| Syrup pH: | 4 to 7 |
| Dissolved Oxygen Concentration:* Recommended: Maximum: | <0.1 ppm .25 ppm |
| Simulated Moving Bed Operation: | Annually with optimized tuning |
*Removing oxygen from both the feed streams and the elution water that goes into the chromatographic separation resin is strongly advised as the process of limiting the oxygen concentrations will maximize the resin service life.
Aldex CSR Features
Highest Recovery and Purity
Aldex CSR Series resins provide the highest recovery and purity for starch based sweeteners as well as the purification of polyols.
Uniform Particle Size
Aldex CSR Series resins are strong acid cation resins manufactured in a process that produces an extremely uniform particle size.
Efficiency
The consistency of Aldex CSR Series resins with their rapid kinetic properties provide improved efficiency in sweetener separations over that of standard-grade resins.
Very low color/taste/odor
Aldex CSR Series resins meets the requirements for paragraph 173.25 of the Food Additive Regulation of the U.S. Food and Drug Administration.
Superior Physical Stability
The swift kinetics and highly uniform particle size provide resistance against bead breakage with ≥ 97% whole uncracked beads.
Long Life
Strong and durable beads ensure long service life.
Safety Information
A material safety data sheet is available for Aldex CSR Series resin. Copies can be obtained from Aldex Chemical Co., LTD. Aldex CSR Series resin is not a hazardous product and is not WHMIS controlled.
Caution: Acidic and basic regenerant solutions are corrosive and should be handled in a manner that will prevent eye and skin contact. Before using strong oxidizing agents in contact with ion exchange resin, consult sources knowledgeable in the handling of these materials.
Aldex CSR Properties
| Index Name | CSR-1 | CSR-2 | CSR-3 |
|---|---|---|---|
| Mass Capacity | 4.5 mmol/g | 4.5 mmol/g | 4.5 mmol/g |
| Moisture Content | 45 to 55% | 45 to 55% | 45 to 55% |
| Bulk density | 0.77 to 0.87 g/ml | 0.77 to 0.87 g/ml | 0.77 to 0.87 g/ml |
| Particle Size | 0.20mm to 0.25mm, 95% | 0.25mm to 0.30mm, 95% | 0.30mm to 0.35mm, 95% |
| Uniformity Coefficient | 1.1 | 1.1 | 1.1 |
Common Bead Size Distribution Ca2+
Light Obscuration Instrument Particle Size
| Particle Diameter: | 305± 15 μm | — |
| Broad Range: | 280 to 343 μm | ≥80% |
| Narrow Range: | 294 to 329 μm | ≥60% |
| Fine Beads: | <275 μm | ≤8% |
| Coarse Beads: | >375 μm | ≤8% |
Backwash Characteristics
Estimated bed expansion of Aldex CSR-1 as a function of backwash flowrate at 77°F (25°C) is represented in Fig. 1. Additional data is provided for comparison against CSR-2 and CSR-3. To find the flow rate necessary for the desired bed expansion at other water temperatures, this equation can be used:
FT = F77ºF [ 1 + 0.008 (TºF – 77) ], where F ≡ gpm/ft2
Fig. 1 Bed Expansion vs. Backwash Flow Rate at 77°F
Pressure Drop
Estimated pressure drop of Aldex CSR-1 as a function of service flowrate and concentration of 42% HFCS (50% and 30% D.S.) is represented in Fig. 2. Additional data is provided for comparison against CSR-2 and CSR-3.
Fig. 2 Pressure Drop vs Flow Rate at various degrees Fahrenheit (F°) for Syrup (42% HFCS) Concentration equals 30% D.S., 50% D.S.
Thermal Expansion
Thermal expansion of Aldex CSR-1 as a function of temperature and ionic form is represented in Fig. 3.
Fig. 3 Percent Volume Change vs Temperature
Applications
In addition to recovery and purification of sweeteners, this resin, or the available resins in K-form or Na-form, can be used in other specialty separations such as production of high fructose com syrup (HFCS) and high-purity fructose and the separation of polyols.