Demineralization & dealkalization
When softening isn't enough and you need genuinely low-conductivity water — or you need to drop alkalinity without going all the way to deionized — ion exchange does both, tuned to the purity your process actually requires.
From partial alkalinity removal to near-zero conductivity.
Demineralization uses cation and anion resins to strip essentially all dissolved ions; dealkalization is a lighter touch that removes bicarbonate alkalinity where full deionization would be overkill.
Cation, anion, or a polished mixed bed.
Cation resin in the hydrogen form swaps metals for H⁺; anion resin in the hydroxide form swaps anions for OH⁻; together they make water. A mixed bed polishes to the lowest conductivity. Dealkalization targets just the alkalinity.
Cation
Hydrogen-form resin removes positively charged ions.
Anion
Hydroxide-form resin removes negatively charged ions.
Polish
An optional mixed bed reaches the lowest conductivity.
Regenerate
Acid and caustic restore the beds; we handle the chemistry.
Where demineralized water is required.
Serviced or owned — your choice.
Run it as a service and we own and maintain the equipment, regenerate the media offsite, and keep the paperwork — or have us engineer and build the system for you to own outright. Same engineering either way.
Common questions
Demineralization or reverse osmosis?
RO removes most dissolved solids by membrane; ion exchange demineralization removes essentially all of them and reaches lower conductivity. They're often combined — RO bulk removal, then IX polishing — but for some streams IX alone is the right call. We'll tell you which fits.
What's the difference between softening and dealkalization?
Softening removes hardness; dealkalization removes bicarbonate alkalinity. They solve different problems — for boiler feed you often want both, to cut scale and reduce blowdown and condensate-line corrosion.
Two-bed vs mixed-bed?
Two-bed (separate cation and anion) is robust and easy to regenerate; mixed-bed blends the resins for the lowest possible conductivity, used as a final polish. The choice depends on your purity target.
Do I have to handle acid and caustic?
Not on the serviced model — regeneration happens offsite and we manage the chemicals and the waste. If you own the system, we'll design the regeneration and safety around your site.
Hit your purity target.
Tell us your conductivity or alkalinity target and flow and we'll configure the right beds — serviced or built for you to own.
Get my free assessment →No cost · No obligation · Serviced or owned