Ion exchange resin refers to a polymer compound with functional groups (ion exchange active groups), network structure, and insolubility. The full name includes the category name, skeleton (or gene) name, and basic name. Ion exchange resins are divided into cation exchange resins and anion exchange resins, which have the functions of softening, adsorption, desalination, purification, etc. Let's take a look at the functions of ion exchange resins in detail:
1. Remove various anions and cations in water
ion exchange resin is used to remove various anions and cations in water, and its maximum consumption is used in pure water treatment in thermal power plants.
2, acting in the food industry
Ion exchange resin acts on sugar, MSG, wine refining, biological products and other industrial equipment. For example, the production of high fructose syrup is to extract starch from corn and then undergo hydrolysis to produce glucose and fructose, which are then exchanged by ion Processing can produce high fructose syrup.
3, acting in the pharmaceutical industry
Ion exchange resins play an important role in the development of the pharmaceutical industry in the new generation of antibiotics and the quality improvement of the original antibiotics. The successful development of streptomycin is a prominent example. Ion exchange resins have obtained research solutions in the extraction of Chinese medicines.了Results.
4. Acting on synthetic chemistry and petrochemical industries
Ion exchange resins are commonly used in organic synthesis as catalysts for esterification, hydrolysis, transesterification, hydration, etc.; instead of inorganic acids and bases, ion exchange resins can also perform the above reactions, and have more advantages. Repeated use, the product is easy to separate, the reactor will not be corroded, does not pollute the environment, and the reaction is easy to control.
In addition, the preparation of methyl tert-butyl ether uses a macroporous ion exchange resin as a catalyst, which is formed by the reaction of isobutylene and methanol, instead of the original tetraethyl lead, which can cause serious environmental pollution.
5. Acting on the environmental protection industry
Ion exchange resins have been used in many environmental protection issues that are of great concern. For example, many aqueous or non-aqueous solutions contain toxic ions or non-ionic substances. These resins can be recycled and used, such as removing metal ions from electroplating waste liquids and recycling films. Useful substances in film production waste.
6. Acting on the hydrometallurgical industry
ion exchange resin can separate, enrich, purify uranium and extract rare earth elements and precious metals from depleted uranium ore.
7. Acting on high-end technology industries such as electronics and nuclear technology
Ion exchange resins have many functions. There are four basic types of strong acid cation resin, weak acid cation resin, strong basic anion resin, and weak basic anion resin. Each type has many models to meet various needs.