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.
Macroporous Strong Basic Anion Exchange Resin D201 U FAQ
What is D201U resin used for?
D201U is a macroporous strong base anion exchange resin, typically used for water deionization, wastewater treatment, and removal of strong acid anions such as chloride (Cl⁻), nitrate (NO₃⁻), sulfate (SO₄²⁻), and organic acids. It is especially effective in systems that handle organic-laden water or require high resistance to fouling.
What does the “U” in D201U stand for?
The “U” usually denotes upgraded performance or food-grade quality depending on the manufacturer. In many cases, it indicates enhanced purity, lower organic leaching, and broader application compatibility, including possible food and beverage uses if certified.
How is D201U different from gel-type anion resins?
Unlike gel-type resins, D201U has a macroporous structure, offering greater surface area and better resistance to organic fouling. It is more suitable for treating water with high organic content and maintains performance over longer operating cycles.
How is D201U regenerated?
D201U is regenerated using alkaline solutions, typically sodium hydroxide (NaOH). The regeneration process displaces adsorbed anions and restores the resin’s full ion exchange capacity. Adequate rinsing is required post-regeneration to prevent caustic carryover.
What industries commonly use D201U resin?
D201U is widely used in industrial water treatment, power plants, chemical processing, food and beverage purification, pharmaceutical water systems, and wastewater polishing.
What are the operating conditions for D201U resin?
pH range: 1 – 14
Operating temperature: ≤ 60°C (140°F)
Form: Typically supplied in Cl⁻ or OH⁻ form
These parameters ensure versatility and stability across a wide range of applications.
Subscribe Newsletter
Will take leading technological reform and innovation,serving market demand as its purpose, winning customer satisfaction as the standard, and integrity and win-win as the concept, continuously exploring product connotation and improving product quality. Our company is willing to work together with people from all walks of life to create brilliance.
