Temperature Limits for Mixed-Bed Resins
The anion component of mixed-bed resins is thermally unstable. For this reason, the maximum life of the resin is achieved only when the temperature is maintained below 100°F.
The resins can operate above 100°F but their useful life is shorter. There is no exact correlation between temperature and life but the following rough guidelines can be used as an estimate:
|
Operating Temp. |
Life Expectancy |
|
below 100°F |
5 to 7 years |
|
100°F to 120°F |
2 to 3 years |
|
120°F to 140°F |
1 to 2 years |
|
140°F to 160°F |
less than 1 year |
The variability is due to the possible presence of oxygen which dramatically increases the rate of oxidation and, due to the possible presence of catalysts such as iron. ResinTech MBD-10 is slightly more resistant than ResinTech MBD-15.