201W is a polystyrene matrix gel type strong basic anion exchange resin, containing -N (CH3)3, equivalent to the solid alkali.With high mass full Exchange capacity and good mechanical strength.
Resin should be wet state preservation. The best temperature is above 0℃. Resin should be put into a closed space or add in salt water of 5% or above if not used for a long time.Should be anti-freezing during transportation. Do not place heavy objects on the resin in case being crashed.
Generally requires alkali- water - acid - water flow path for processing. Strict requirement needs three circulation before coming to final ion kenel.
Need to consider different transformation expansion rate to set aside enough space to prevent resin overflow and ensure the appropriate liquid level height; Column diameter ratio should be within a reasonable range and avoid bias current; Use wet packed column or back-flushing to wash away bubbles inside resin layer.
Before liquid going into the resin column, steps as flocculation, filtration, or sand-filtration should be taken so that it doesn’t jam resin pore with suspended solids .
Resin inside the column that hasn’t been used for a long time should be storaged outside of the column after washing, or adding salt water in the salt resistant medium while keeping liquid level not dehydrated with usual backwashing to loosen resin in case of agglomeration.
Strong Base Anion Exchange Resin 201W FAQ
What is Strong Base Anion Exchange Resin 201W used for?
201W is primarily used for removing strong acid anions such as chloride (Cl⁻), sulfate (SO₄²⁻), and nitrate (NO₃⁻) from water in deionization, demineralization, and ultrapure water production systems. It is especially suitable for industrial and high-purity water treatment applications.
What does the “W” in 201W stand for?
The “W” typically denotes water-treatment grade, meaning the resin is optimized for use in industrial water purification, with stable performance, low organic leaching, and good resistance to oxidation and fouling.
What are the key features of 201W resin?
201W is a Type I strong base anion exchange resin with quaternary ammonium functional groups.
How is 201W regenerated?
The resin is regenerated using sodium hydroxide (NaOH) or another suitable alkali solution. Proper regeneration restores its anion exchange capacity by replacing absorbed anions with hydroxide ions (OH⁻).
What are common applications of 201W resin?
Boiler feed water treatment
Electronics ultrapure water systems
Pharmaceutical water purification
Demineralized water systems
Food & beverage water conditioning (if certified)
What are the recommended operating conditions for 201W?
pH range: 1 – 14
Max operating temperature: ~60°C (140°F)
Form: Usually supplied in Cl⁻ or OH⁻ form
These conditions ensure reliable long-term use across diverse water treatment systems.
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