Physical Properties of Ion Exchange Resin

Particle size and related physical properties have great influence on its work and performance. Ion exchange resin is composed of classification name, skeleton (or gene) name and basic name. The pore structure is divided into two types: gel type and large pore type. All macroporous resins with physical pore structure are added "big hole" before the full name. If the classification is acidic, the word "yang" should be added before the name, while the classification is alkaline, and the word "yin" should be added before the name. Such as: macroporous strong acidic styrene cation exchange resin. Ion exchange resins are usually made into small particles, and their size is also important. The smaller the resin particles are, the faster the reaction speed is. However, the greater the resistance of fine particles to liquid passage, the higher the working pressure, especially the higher the viscosity of concentrated sugar solution, the more obvious the effect is. Therefore, the particle size of bleaching agent resin should be appropriate. When the particle size of the resin is less than 0.2 mm, the resistance to flow through the resin increases obviously, and the flow rate and productivity decrease. The physical properties of ion exchange resin with bleaching agent were introduced.

　　The particle size of ion exchange resin is usually determined by wet screening method. The resin is screened under the total water absorption rate and accumulated on 20, 30, 40, 50 mesh screen. 90% of the particles pass through the corresponding sieve hole diameter, which is called the effective particle size of resin. Ion exchange resin is composed of classification name, skeleton (or gene) name and basic name. The pore structure is divided into two types: gel type and large pore type. All macroporous resins with physical pore structure are added "big hole" before the full name. If the classification is acidic, the word "yang" should be added before the name, while the classification is alkaline, and the word "yin" should be added before the name. Such as: macroporous strong acidic styrene cation exchange resin. The effective particle size of the most common resin products ranges from 0.4 mm to 0.6 mm.

　　The homogeneity of ion exchange resin particles is expressed by homogeneity coefficient. Used to determine the effective particle size of resin. The cumulative retention is 40%, which corresponds to the ratio of sieve diameter to effective particle size. When the effective particle size of resin (IR-120) is 0.4m 0.6mm, and the effective particle size of resin on 20 mesh screen, 30 mesh screen and 40 mesh screen is 18.3%, 41.1% and 31.3% respectively, the calculated uniformity coefficient is 2.0.

　　Ion exchange resin particles have the characteristics of migration, friction, expansion, shrinkage, etc. After long-term use, a small amount of loss and damage will occur, so the resin should have high mechanical strength and wear resistance. Ion exchange resin is composed of classification name, skeleton (or gene) name and basic name. The pore structure is divided into two types: gel type and large pore type. All macroporous resins with physical pore structure are added "big hole" before the full name. If the classification is acidic, the word "yang" should be added before the name, while the classification is alkaline, and the word "yin" should be added before the name. Such as: macroporous strong acidic styrene cation exchange resin. Generally, the resin with low crosslinking degree is easy to decompose, but the durability of bleached resin mainly depends on the uniformity of crosslinking structure and strength. For example, macroporous resin has high crosslinking degree, stable structure and can withstand repeated regeneration. The main reasons for the freezing of softened water resin are introduced.