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Ion Exchange Resins

Ion Exchange Resins

Nalco Pretreatment Solutions (PTS) offers a variety of ion exchange resins to suit just about any water treatment application including:

Nalco PTS is a stocking distributor for Dow – Dowex, Purolite, Sybron LANXESS (Ionac & Lewatit), and Thermax (Tulsion).

Resin Analysis

Nalco PTS offers independent resin analysis to help determine if and when to replace the resin. Our in-house engineering staff can assist in reevaluation of resin choices when the conditions of operation have changed. We have the knowledge to determine what type of resin will work best to maximize equipment output.

Resin Equivalency

Ion exchange resin (occasionally referred to as Zeolite or Zeolite mineral) chemically reacts with ions in water. It was developed as an alternative to zeolite and functions similarly. Regardless of brand, the core principles of ion exchange resin remain the same. There are four main types of resin, each with their own function:

  • Strong acid cation (SAC)
  • Weak acid cation (WAC)
  • Strong base anion (SBA)
  • Weak base anion (WBA)

Mixed bed resins are a combination of cation and anion resins. Usually the ratio for mixed bed resin is 1:1 or 1:2 depending on the application. There are also specialty resins for the removal of nitrates, organics, arsenic, perchlorate and TOC.

To learn more, please refer to the Resin Equivalency Chart for Purolite, Dow, LANXESS Sybron Chemicals Inc, Thermax, Rohm & Haas, and Resin Tech.

Expected Life of Ion Exchange Resins

Each application requires a different water quality. In general, cation resin for water softening and demineralization may last five to 10 years. Anion resins used in demineralization last anywhere from three to five years, and are dependent on operational conditions. Like every other resin, the life of mixed bed resin is dependent on the application in which it is being used. Resin life is difficult to predict; in critical applications it's best to start analyzing and benchmarking the resin at least once per year.

Posted on April 7, 2015 by Brian Krummel

How Can We Help?
Looking to service, replace, expand, or improve your water pretreatment system? Need supplies or replacement parts for your pretreatment water equipment? Let Nalco PTS help you find what you're looking for or contact Nalco for further assistance with all of your water pretreatment system needs.
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Nalco Pretreatment Solutions (PTS) is a leading manufacturer and supplier of services, systems and supplies for industrial and commercial water pretreatment systems for treating process water, product water, boiler pretreatment, and drinking water.
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