D113 resin is in a carboxylic acid on the pore structure of acrylic copolymer (-cooh) group - cation exchange resin.Mainly used in industrial water treatment, especially the removal of bicarbonate, carbonate and other alkaline salt, also can be used for zinc, nickel waste recycling, separation and purification of biochemical drugs, etc.
The separation and purification of biochemical drugs
Precautions
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.
Weak Acid Cation Exchange Resin D113 FAQ
What is Weak Acid Cation Exchange Resin D113 used for?
D113 is primarily used for removing hardness ions such as calcium and magnesium from water. It is also effective in boiler water pre-treatment, partial demineralization, and heavy metal removal in industrial applications.
How does D113 resin differ from strong acid cation exchange resins?
Unlike strong acid resins, D113 is a carboxylic-type weak acid resin that operates efficiently at neutral to alkaline pH. It is more selective for alkaline earth metals and requires less acid for regeneration, making it cost-effective and environmentally friendly.
What are the main features of D113 resin?
D113 offers high ion selectivity, good mechanical strength, excellent chemical resistance, and low regenerant consumption. Its macroporous structure allows for rapid ion exchange and easy regeneration.
In which industries is D113 commonly applied?
D113 is widely used in power plants, chemical processing, pharmaceuticals, metallurgy, and municipal water treatment, especially where mild pH operating conditions are required.
How is D113 resin regenerated?
D113 is typically regenerated using dilute acids, such as hydrochloric acid or sulfuric acid, which remove accumulated cations and restore the resin to its active (hydrogen) form.
What is the operating pH range of D113 resin?
D113 functions effectively within a pH range of 4 to 10, making it suitable for applications involving neutral or slightly alkaline solutions without compromising resin integrity.
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