Product description
Mixed bed deionisation resin is a high purity ion exchange media designed to produce deionised water with very low conductivity. The resin consists of a carefully balanced mixture of strong acid cation and strong base anion exchange resins, enabling efficient removal of dissolved ionic contaminants from water. This type of resin is typically used as a polishing stage in high purity water treatment systems, particularly downstream of reverse osmosis or primary deionisation units.Technical overview
Mixed bed deionisation resin combines cation and anion exchange media in a single blended resin bed. This configuration allows simultaneous removal of positively and negatively charged ions, resulting in highly purified water with low conductivity. The resin is commonly used in industrial and laboratory water purification systems where consistent water quality is required. Typical treated water conductivity can reach approximately 0.1 µS/cm depending on feedwater conditions and system design.Operating principle
Mixed bed deionisation resin removes dissolved ions through an ion exchange process. The strong acid cation resin exchanges positively charged ions such as calcium, magnesium, and sodium for hydrogen ions. At the same time, the strong base anion resin exchanges negatively charged ions such as chloride, sulfate, and nitrate for hydroxide ions. The hydrogen and hydroxide ions combine to form pure water molecules, resulting in a significant reduction in dissolved ionic contaminants and low conductivity water.Material options
Typical resin composition includes:- Strong acid cation exchange resin
- Strong base anion exchange resin
- Mixed bed ion exchange media
Available micron ratings
Mixed bed deionisation resin does not provide filtration based on particle size or micron rating. Water treatment performance is determined by ion exchange capacity and the resin’s ability to remove dissolved ions. Treated water quality depends on:- Feedwater conductivity
- Contact time within the resin bed
- System flow rate
- Installed resin volume
Design and construction
The resin consists of porous polymer beads that provide a large surface area for ion exchange reactions. The mixed bed configuration ensures efficient removal of both cations and anions in a single treatment stage. Typical characteristics include:- Mixed bed ion exchange resin
- Combination of strong acid cation and strong base anion media
- High purity resin formulation
- Designed for polishing stages in high purity water systems
- Compatible with pressure vessels and ion exchange columns
- Suitable for cartridge-based treatment systems
Typical applications
Mixed bed deionisation resin is widely used in water purification systems including:- Reverse osmosis polishing stages
- Industrial deionisation plants
- Laboratory water purification systems
- High purity process water treatment
- Electronics manufacturing water systems
- General industrial water polishing applications
Key benefits
- Production of low conductivity deionised water
- High efficiency removal of dissolved ionic contaminants
- Suitable for polishing stages in RO and DI systems
- Consistent water quality in industrial applications
- Compatible with pressure vessels and ion exchange units
- Suitable for large treatment systems and cartridge applications
Configuration and quotation
To determine the appropriate resin configuration, the following parameters should be specified:- Feedwater conductivity or total dissolved solids (TDS)
- Required outlet water conductivity
- System flow rate
- Resin bed volume
- Vessel or column size
- Expected service life before resin replacement