• 2022-10-19

2. Composition of crosslinking agent The common crosslinking agent of cation exchange resin is divinylbenzene. The isomer of the crosslinking agent divinylbenzene has a great influence on the structure of the copolymer, so it can significantly affect the rate of sulfonation reaction. The effect of the amount of divinylbenzene on the sulfonation rate of the copolymer is very clear, but the effect o...

• 2022-10-20

4. Swelling agent In industry, dichloroethane is used as swelling agent to prepare strong acid cation exchange resin, but this is not the best choice. Dichloroethane cannot be miscible with sulfuric acid, and the diffusion of sulfuric acid into the resin becomes the control factor of sulfonation rate. Dimethyl sulfoxide can be miscible with sulfuric acid, which is conducive to the diffusion of sul...

• 2022-11-02

The preparation of ion exchange resin by polycondensation is the earliest method to synthesize organic ion exchanger. Although most of the ion exchange resins produced today are additive type functionalized copolymers, the polycondensation method is still very useful. Some polycondensation ion exchangers are still widely used. The early polycondensation resin was made into block polymer by bulk po...

• 2022-11-03

2、 Weak acid cation exchange resin The carboxylic acid type cation exchange resin was first synthesized by condensation polymerization of 3,5-dihydroxybenzoic acid and formaldehyde. The exchange capacity of this resin can reach about 7 meq/g. Dissolve 20g of 2,4-dihydroxybenzoic acid in alkaline water, add 10g of sodium chloride and 6g of phenol, then place them in ice salt water for cooling, add ...

• 2022-11-03

Ion exchange resin has been widely used in pharmaceutics, but its development also has its limitations. Time is proving the safety of drug lipid complex in the drug domain. The advantages of ion exchange resin will undoubtedly promote the continuous progress of ion exchange resin technology. Of course, today is mainly about the role of ion exchange resin in pharmacy. 1. Mask one's taste The ion ex...

• 2022-11-04

The desalination principle of ion exchange resin is the process in which the ion exchange resin separates the salt from the solution: the metal cations (Na+, Ca2+, K+, Mg2+, Fe3+, etc.) contained in the aqueous solution in the action environment of the ion exchange resin are exchanged with the H+on the cation exchange resin (containing acidic groups such as sulfonic acid group (- SO3H), carboxylic...

• 2022-11-10

(1) Strong acid cation resin This kind of resin contains a large number of strong acidic groups, such as sulfo SO3H, which is easy to dissociate H+in solution, so it is strongly acidic. After the resin is dissociated, the negative group contained in the body, such as SO3 -, can adsorb other cations in the bound solution. These two reactions make the H+in the resin exchange with the cation in the s...

• 2022-11-22

Ion exchange resin has the advantages of good chemical stability, high mechanical strength, and large exchange capacity, so it has been widely used in the water treatment of power station boilers and industrial boilers, as well as in the production of demineralized water and purified water. However, during the use of the resin, due to the pollution of harmful impurities (such as ferrites, organics...

• 2022-11-29

1. Quartz sand cushion is in disorder. When the quartz sand cushion is selected at the bottom of the exchanger, the quartz sand layer will be caked due to improper backwashing operation or fouling; If the backwash water is flushed out locally, the quartz sand cushion will be disordered. The center of the dome shaped perforated plate under the quartz sand cushion shall not be perforated, so as to p...

• 2022-11-30

1. Pretreatment of cation exchange resin: 1.1 After the cation resin is filled, backwash shall be carried out first to ensure 80% backwash expansion rate to remove impurities and fine resin particles until the backwash effluent is clear, colorless, tasteless and foam free. 1.2. Fill 3-4% HCl solution, 4m/h, when the outlet concentration reaches 1.5-2%, stop filling and soak for more than 8 hours, ...

• 2022-12-05

The specific operations are as follows: Clean the bed and put water 1-2 meters deep (ensure that the water surface is higher than the resin layer): 1. The design height shall be filled with resin (the final height of resin shall be subject to re ecology). 2. After installing the cation exchange resin, backwash to make the resin surface smooth, and then install the anion exchange resin; Two steps h...

• 2023-03-30

Strong acid cation exchange resin is a type of ion exchange resin that is used in many industrial and commercial applications. It has the ability to remove positively charged ions from water, making it an ideal choice for water purification and wastewater treatment. The resin can also be used in chemical processes such as deionization, softening, and demineralization. Its versatility makes it a po...