Dealkalization Anion Ion Exchange Resin

Lanlang ® TA201D Macroporous type I strong base anion exchange resin used for water demineralization, organics removal.
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Product Details

Lanlang ® TA201D in chloride form could remove both strong and weak acid radicals such as sulfate, nitrate, arsenate, chromate and silicate to extreme low concentration level, at the same time, it can be used in Dealkalization. Combining with strong acid cation exchange resin (in hydrogen form), TA201D in hydroxide form can be used in all types of demineralization system especially be suited for high flow rate and high temperature polishing.

Ion exchagne resin

Dealkalizers are most often used as pre-treatment to a boiler and are usually preceded by a water softener. Alkalinity is a factor that most often dictates the amount of boiler blowdown. High alkalinity promotes boiler foaming and carryover and causes high amounts of boiler blowoff. When alkalinity is the limiting factor affecting the amount of blowdown, a dealkalizer will increase the cycles of concentrations and reduce blowdown and operating costs. Dealkalization is the process of removing anions such as bicarbonates, carbonates, sulfates, and nitrates.


Strong base anion ion exchange resins may be used for dealkalization, while weak base anion resins work best for removing acids and organics from water. Anion dealkalizers are primarily used to remove alkalinity from boiler feedwater with a low-to-moderate amount of total dissolved solids (TDS). This process treats softened water with a chloride form anion resin that is accomplished by the exchange of chloride for bicarbonate and carbonate alkalinity, thus the finished water is enriched with chlorides. Anion dealkalizers should be preceded by a sodium cycle softener. The softener will prevent the possible precipitation of calcium carbonate or magnesium hydroxide in the anion bed. It is also beneficial in the removal of suspended matter from the feed water. The softener should be selected based on water usage, with consideration given to the amount of water that will be used for the regeneration of the dealkalizer. The additional water usage during the dealkalizer regeneration cycle is typically a 10 to 25 % increase.


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