Naming convention for ion exchange resins in softened water equipment

The model of ion exchange products is composed of three Arabic numerals, with the digits representing the classification of the product, the second digit representing the differences in the skeleton, and the third digit being the sequence number used to distinguish differences in genes, crosslinking agents, etc. The second wet ion exchange resin.

The meaning of the first and second digits in the resin model:

The code 0123456 represents strong acidity, weak acidity, strong alkalinity, weak alkalinity, chelation, amphoteric, and redox. Skeleton names: styrene acrylic, acetic acid, epoxy, vinyl pyridine, urea formaldehyde, vinyl chloride.

Add "D" before the model of macroporous resin, and the crosslinking degree value of gel resin can be represented by "×" after the model. As D011 × 7, it represents a macroporous strongly acidic acrylic cation exchange resin with a crosslinking degree of 7.

Some foreign products use the letter C to represent cationic resin (C is a letter of cation) and A to represent anionic resin (A is a letter of Anion). For example, Amberlite's IRC and IRA represent cationic resin and anionic resin, respectively.

Ion exchange resins can be divided into seven categories based on their performance:

1. Cation exchange resin. The active exchange group of this type of resin is acidic, and its cation can be exchanged by cations in the solution.

2. Anion exchange resin. The active exchange group of this type of resin is alkaline, and its anions can be exchanged by anions in the solution.

3. Chelating resin. The special active groups of this type of resin can form chelates with certain metal ions, and selectively exchange certain metal ions during the exchange process, which is of great significance for chemical separation.

4. Macroporous resin. This type of resin is prepared by adding appropriate pore forming agents during polymerization, filling inert molecules during the process of network curing and chain unit formation, leaving pores in advance that do not participate in the reaction. After the stock price is formed, the pore forming agent is extracted, leaving pores.

5. Redox resin. This type of resin contains reversible oxidation-reduction groups that can undergo electron transfer with ions in solution. It is mainly used for oxidation-reduction without introducing impurities, improving product purity, and removing dissolved oxygen in the solution.

6. Extract resin. Also known as extraction resin, it is a resin containing liquid extractant, which is a copolymer of styrene divinylbenzene with a macroporous structure and organic extractant, and has the advantages of both ion exchange and extraction methods.

7. Fiber exchange agent. The hydroxyl groups on natural cellulose can be esterified, phosphorylated, and carboxylated to produce cation exchangers; After amination, it is made into an anion exchanger.

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