Alfa Chemistry uses professional analysis methods to analyze the particle size of ion exchange resin samples provided by customers. We are familiar with the testing standards of many countries. Our service scope includes particle size range, particle size at pointed lower screen, particle size at pointed upper screen, effective size and uniformity coefficient. Alfa Chemistry is guided by customer requirements and constantly strives to develop products with better performance for each industry. We use top R&D laboratories and resources to help customers' needs.
What is the Particle size of ion exchange resins?
The particle size of the ion exchange resins has a great influence on the resin exchange capacity, the uniformity of the liquid distribution in the resin layer, the pressure drop through the resin layer, and the loss of resin during exchange and backwashing. For a resin with a smaller particle size, the reaction speed is higher, but the resistance of the liquid to pass is also larger, and a higher working pressure is required; while the resin particle size is larger, the exchange rate is slow.
Test items
- Particle size
- Particle size range
The volume fraction of the volume of sample particles in the specified particle size range to the volume of all sample particles.
- Particle size at pointed lower screen
The volume fraction of the sample particles smaller than the specified lower limit of the particle size accounted for the volume of all sample particles.
- Particle size at pointed upper screen
The volume fraction of the volume of the sample particles larger than the specified upper limit of the particle size accounted for the total volume of the sample particles.
- Effective size
Suppose the sample particles are arranged from large to small in diameter to 90% of the volume of particles, and the smallest particle diameter is specified as the effective particle size, which is represented by the symbol d90 (μm).
- Uniformity coefficient
Suppose the sample particles are arranged from large to small in diameter to 40% of the volume of the particles. The diameter of the smallest particle is d40 (μm). The ratio of d40 to effective particle size d90 is specified as its uniformity coefficient.
Analytical methods
The sieving method and the instrument method are currently two methods for detecting the particle size of ion exchange resins. The sieving method is the simplest, earliest and most widely used method for particle size determination. The sieving method can not only determine the particle size distribution, but also obtain the uniformity coefficient by drawing the particle size distribution curve. Instrumental method refers to the use of laser particle size analyzer for testing. The advantages of the instrument method are fast speed, simple operation, good data repeatability and consistency, and online measurement, which has become the main method of particle analysis.
Fig.1 Schematic diagram of measurement principle of laser particle size analyzer
Our Goals
Alfa Chemistry is a company with advanced resin analysis technology. Our pursuit is to provide you with comprehensive resin analysis services, aiming to help you efficiently solve the problem of improving product quality and accelerating the research and development of new materials. Relying on the cooperation with various enterprises and institutions, we have accumulated many years of industry experience, and we guarantee that you will receive the most professional analysis services. We are accelerating the construction of an integrated platform to better respond to customer needs. If you have any questions about resin analysis, you can directly contact us. We are dedicated to provide you with quality services at any time. We look forward to your inquiry.
Home