AMBERLITE™ IRA70RF
Industrial Grade Weak Base Anion Exchanger
Introduction
AMBERLITE IRA70RF resin is a weak base anion exchange resin with a gel type acrylic matrix. The acrylic polymer matrix is extremely flexible providing far superior physical stability and organic fouling resistance in comparison with conventional polystyrene based resins. Less breakdown and less fouling yields longer life in the application. AMBERLITE IRA70RF resin is a gel-type resin giving it higher capacity and longer run lengths than macroporous-type resins. Compared to other acrylic weak base anion resins, AMBERLITE IRA70RF resin has an excellent rinse performance. Its excellent organic reversibility makes it ideally suited to demineralise surface waters containing high amounts of organic matter. The particle size distribution of AMBERLITE IRA70RF resin has been specifically selected to give optimum performance in packed and floating bed applications.
Properties
Physical Form |
Translucent white spherical beads |
Matrix |
Crosslinked acrylic gel structure |
Functional group |
Tertiary amine |
Ionic form as shipped |
Free Base (FB) |
Total exchange capacity |
≥ 1.40 eq/L (FB form) |
Moisture holding capacity |
56 to 64 % (FB form) |
Shipping weight |
655 g/L |
Particle Size |
|
Uniformity coefficient |
≤ 1.60 |
Harmonic mean size |
0.700 to 0.950 mm < 0.355 mm 0.5 % max |
Reversible swelling |
FB → Cl- ≤ 10 % |
Water Treatment |
|
Maximum operating temperature |
40 °C |
Minimum bed depth |
700 mm |
Service flow rate |
5 to 40 BV*/h |
Regeneration |
|
Regenerant |
NaOH |
Level |
130 % of ionic load |
Concentration |
2 to 4 % |
Minimum contact time |
30 minutes |
Slow rinse |
2 BV at regeneration flow rate |
Fast rinse |
3 to 10 BV at service flow rate |
Operating capacity
The actual operating capacity of AMBERLITE IRA70RF resin depends on a number of factors:
1.composition of water (particularly CO2 and SO4 content),2.specific flow rate
3.ionic loa
Regeneration
Optimum regeneration dosage is a quantity of caustic soda equivalent to 120 to 140 % of the operating capacity.
Organic matter
The aliphatic structure of AMBERLITE IRA70RF resin gives it slightly less affinity for organic acids found in surface waters than polystyrene weak base resins. This weaker affinity combined with the flexible acrylic polymer structure allows for more complete elution of the organics from the resin. Therefore, AMBERLITE IRA70RF resin offers a large reversible capacity for the removal of organic matter.
Limits of use
AMBERLITE IRA70RF resin is suitable for industrial uses. For all other specific applications such as pharmaceutical, food processing or potable water applications, it is recommended that all potential users seek advice from Rohm and Haas in order to determine the best resin choice and optimum operating conditions.
Hydraulic Characteristics
Figure 1 shows the bed expansion of AMBERLITE IRA70RF resin as a function of backwash flow rate and water temperature. Figure 2 shows the pressure drop data for AMBERLITE IRA70RF resins as a function of service flow rate and water temperature.