Softening Resin ProSoft™ ER10011-MP
ProSoft™ ER10011-MP (P/N ER10011-MP) is a premium grade, weak acid, macro-porous, cation resin supplied in the hydrogen form (also available in the sodium form) as moist, tough, uniform, spherical beads. Its ion exchange functionality is derived from the carboxylic group, which is easily converted to the hydrogen form and has a high affinity for divalent ions. It is intended for use in hydrogen cycle dealkalization, deionization, and chemical processing applications.
ER10011-MP can be operated as a softener in the sodium cycle. This requires a two stage regeneration process using a strong acid first and then a neutralization rinse to put the resin into the sodium form. It is especially effective in high solids softening applications.

Metal Removal
ER10011-MP can be operated in the sodium or hydrogen cycle to remove heavy metals from waste streams with a pH above 5.5 in the absence of hardness. Operation in the sodium form provides a neutral pH effluent but requires a two stage regeneration as described above.

Bicarbonate alkalinity associated with multi-valent cations such as hardness can be effectively removed using ER10011-MP in the hydrogen form. When operated in this manner both hardness and alkalinity are removed. The reaction is limited by the amount of alkalinity and the ratio of hardness (multivalent cations) to alkalinity.
(See the Alkalinity graphs below.)
NOTE: Click on graphs below to enlarge.
ER10011-MP Pressure Drop Graph
PRESSURE DROP — The graph above shows the expected pressure loss per foot of bed depth as a function of flow rate at various temperatures.
ER10011-MP Backwash Graph
BACKWASH — After each cycle the resin bed should be backwashed at a rate that expands the bed 50 to 75 percent. This will remove any foreign matter and reclassify the bed.
The following two graphs show the base operating capacity according to the ratio of hardness to alkalinity and the effects of exhaustion flow rate and temperature. When the hardness to alkalinity ratio is greater than 1.0, ER10011-MP will produce some free mineral acidity during the first 10% of the service exchange. Alkalinity leakage will occur after approximately 60 to 70% of the run. The operating capacity is based on 10% alkalinity leakage at the end of the run.
ProSoft ER10011-MP Ratio of Hardness to Alkalinity Effect on Capacity Graph
ProSoft ER10011-MP Flow Rate and Temperature Effects on Capacity Graph
    Features & Benefits:    
  Metals Removal—Useful as a scavenger for copper, nickel, hardness, and most multivalent ions.  
  Carboxylic functional groups—Gives extremely high regeneration efficiencies and high operating capacities.  
  Highly uniform particle size—16 to plus 50 mesh range; gives a lower pressure drop while maintaining superior kinetics.  
  Superior physical stability—95% plus sphericity and low swelling together with a macroporous structure and a very uniform particle size provide greater resistance to bead breakage.  
Part Number ER10011-MP
Polymer Structure Acrylic/Divinylbenzene
Functional Group R-(COOH)-
Ionic Form (as shipped) Hydrogen or Sodium
Physical Form Tough, spherical beads
Screen Size Distribution
  + 16 mesh (US Std.)
  – 50 mesh (US Std.)
16 to 50
  < 10 percent
  < 1 percent
pH Range 0 to 14
Sphericity 90+ percent
Water Retention
  Hydrogen Form
  Sodium Form
46 to 56 percent
57 to 67 percent
Solubility Insoluble
Approx. Ship. Wt.
  Hydrogen Form
  Sodium Form
47 lb/cu.ft.
50 lb/cu.ft.
  H+ to Na+
  Ca+2 to N+
Approx. 80 percent
Approx. 30 percent
Total Capacity
  Hydrogen Form
  Sodium Form
> 3.8 meq/mL
> 2.0 meq/mL
Maximum Temperature 250°F (121°C)
Minimum Bed Depth 30 inches
Service Flow Rate 2 to 5 gpm/cu.ft.
Backwash Rate
  (See graph left)
50 to 75 percent Bed Expansion
Regenerant Concentration *
5 to 10 percent
0.8 percent
Regenerant Flow Rate 0.3 to 0.75 gpm/cu.ft.
Regenerant Contact Time 30 minutes minimum
Regenerant Level Depends on Alkalinity
Displacement Rinse Rate Same as Regenerant Flow Rate
Displacement Rinse Volume 10 to 15 gal/cu.ft.
Fast Rinse Rate Same as Service Flow Rate
Fast Rinse Volume 35 to 60 gal/cu.ft.
* CAUTION: DO NOT MIX ION EXCHANGE RESINS WITH STRONG OXIDIZING AGENTS. Nitric acid and other strong oxidizing agents can cause explosive reactions when mixed with organic materials such as ion exchange resins.
SWT Ion Exchange Resin Guide
This information has been gathered from standard materials and or test data that is believed to be accurate and reliable. Nothing herein shall be determined to be a warranty or representation expressed or implied with respect to the use of such information or the use of the goods described for any particular purpose alone or in combination with other goods or processes, or that their use does not conflict with existing patent rights. No license is granted to practice any patented invention. It is solely for your consideration, investigation and verification.
ProSoft™ is a trademark of Safe Water Technologies, Inc.
Safe Water Technologies, Inc.
996 Bluff City Boulevard
Elgin, IL 60120 USA
Telephone: +1.847.888.6900
Facsimile: +1.847.888.6924

Last Updated: December 15, 2021