Many facilities require high-purity water for their process. Although the language and terminology used can vary greatly, from demineralized water, deionized water, or even ultra pure water, the fundamentals are the same—the dissolved solids and other impurities need to be removed. There are various ways in which to achieve this removal and some facilities may require additional polishing steps to control potential biological fouling or other contaminants, but this page is specifically geared towards DI or deionized bottles.

Similar to the issue above with the varying terminology for high purity water, DI bottles are also called many things: DI Tanks, Mixed-beds, resin bottles, cation bottles, anion bottles, dual beds, ion-exchange bottles, etc. Although some differences between these do exist the basic principle is the same. Water is passed through a bottle that contains ion exchange resin, and some percentage of, if not all of, the dissolved solids are removed, leading to a more desirable process water.

Eventually the resin in the bottles will become exhausted and need to be regenerated, which is done with hydrochloric acid or sodium hydroxide depending on the type of resin. For a mixed-bed, which results in the highest purity water, the resin must be removed from the bottle, separated, then treated individually before being mixed back together for use again in the field. A mixed-bed bottle consists of a Strong Base Anion resin, which removes the anions (negatively charged ions) from the water and replaces them with a hydroxide ion (OH-), and a Strong Acid Cation resin, which removes the cations (positively charged ions) from the water and replaces them with a hydrogen ion (H+).

The hydroxyl and hydrogen ion then combine to form water molecules (H+ + OH- —> H20), resulting in high purity water. The contaminants then remain on the resin until the bottles are exchanged and the material is regenerated.

FCT Water can custom engineer a DI system to meet whatever requirements your facility may require. From a system audit and improvement, to a newly constructed system, we can provide a turnkey solution. At our in-house regeneration plant we are able to regenerate and/or re-bed all of the different types of bottles mentioned above, including mixed-bed resin. Our network of warehousing and delivery teams allow us to provide quick turnaround times and excellent customer service.

Service Deionization (SDI) is a safe and economical way for customers to obtain consistent, high-purity water. Our systems consist of activated carbon and ion exchange resin contained in portable tanks that are connected directly to your water supply. This allows for the ion exchange of two electrolites. In water treatment, ion exchange is where one contaminant is removed from the water by another substance creating high-purity water.

Why choose Deionization Services from FCT Water Treatment?

  • Largest regeneration plant for deionization bottles in Colorado
  • Local delivery available in Illinois, Texas, Northern California and Colorado
  • One of very few companies that specialize in water treatment chemistry along with deionization services
  • No major capital investment
  • No upkeep, parts or maintenance of equipment
  • Guaranteed water purity and flow rates for your specific needs

When deionization tanks are exhausted FCT Water Treatment service technicians replace the exhausted tanks with regenerated tanks, rotating them for maximum throughput.

Services Offered

At FCT Water, we’ll integrate into your workflow to ensure you get the water and chemicals you need. Whether you need a custom closed loop system, resin regeneration, or a regular tank exchange, we’ll design a system to meet your needs.

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