overview | ion exchange resin is a kind of high molecular compound with reticular structure with active groups. Ion exchange resin has the functions of exchange, selection, adsorption and catalysis, and has been widely used in industrial high-purity water preparation, medicine and health, metallurgical industry, bioengineering and other fields. |
classification | resins can be divided into natural resins and synthetic resins. among synthetic resins, ion exchange resins are the most commonly used ones, including strong acids, strong bases, weak acids and weak bases. |
use | ion exchange resin is widely used in many fields such as electric power, food, medicine and health, petrochemical industry, electronics, metallurgy and environmental protection. The most prominent application of ion exchange resin is in the field of water treatment. |
principle | during ion exchange, ions are in water (such as Na, Ca ~(2), K ~, Mg ~(2), Fe ~(3), etc.). Exchange with H on a cation exchange resin and transfer the cations in water to the resin. H on the resin is exchanged for water. The anions in the water (such as Cl-, HCO3-, etc.) are exchanged with the anion exchange resin on OH-, the anions in the water are transferred to the resin, and the OH-on resin is exchanged in the water. When H combines with OH-to form water, desalination can be achieved. |
application field | 1. the demand for ion exchange resin in the field of water treatment is very large, accounting for about 90% of the output of ion exchange resin, and is used for the removal of various anions and ions in water. At present, the large consumption of ion exchange resins is used in pure water treatment in thermal power plants, followed by atomic energy, semiconductors, and electronics industries. 2. Food industry ion exchange resin can be used in sugar, monosodium glutamate, wine refining, biological products and other industrial devices. For example: the production of high fructose syrup is made from corn after the starch is extracted, and then the hydrolysis reaction produces glucose and fructose, and then the ion exchange treatment can produce high fructose syrup. The consumption of ion exchange resins in the food industry is second only to water treatment. 3. The ion exchange resin in the pharmaceutical industry plays an important role in the development of a new generation of antibiotics and the quality improvement of the original antibiotics. The successful development of streptomycin is a prominent example. In recent years, there have been studies on the commission of traditional Chinese medicine. 4. Environmental protection Ion exchange resins have been applied to many environmental protection issues of great concern. At present, many aqueous or non-aqueous solutions contain toxic ions or non-ionic substances, which can be recycled with resins. Such as removing metal ions in electroplating waste liquid, recycling useful substances in film production waste liquid, etc. |