• What is ion exchange reaction?
    • 2022-11-17

    Ion exchange resins are cross-linked polymer compounds containing ionizable groups and insoluble in any solvent. Their separation and purification of substances are mainly achieved through ion exchange reaction. Ion exchange reaction usually refers to the ion exchange reaction between ion exchange resin and ions in solution. With different physical and chemical structures or different ionic system...

  • Ion exchange equilibrium and ion exchange selectivity
    • 2022-11-18
    Ion exchange equilibrium and ion exchange selectivity

    The separation function of ion exchange resin for mixed ions (including inorganic ions and organic ions) is based on its ion exchange selectivity. In a closed system, the fixed ion (A) of the ion exchange resin exchanges with the ion (B) in the solution, and can reach equilibrium after a certain time. The selectivity of ion exchange resin is affected by many factors, such as the nature of chemical...

  • Iron poisoning treatment of ion exchange resin
    • 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...

  • What is the crosslinking degree of ion exchange resin?
    • 2022-11-23
    What is the crosslinking degree of ion exchange resin?

    Crosslinking degree is one of the important properties of styrene resin. It is the network structure of the framework of ion exchange resin polymerized by various organic materials, expressed in percentage. Crosslinking degree refers to the mass percentage of divinylbenzene (commonly known as "crosslinking agent") contained in styrene resin. That is, if the crosslinking degree=divinylbenzene mass/...

  • How to clean ion exchange resin ?
    • 2022-11-28

    Before using the ion exchange resin purchased in the market, in order to prevent impurities in the resin from polluting the water quality, the resin needs to be pretreated. The following steps are for pretreatment: 1. First, clean the resin with hot water. The cation resin can be cleaned with 70-80 ℃ hot water. The heat resistance of the anion resin is poor. Generally, 50-60 ℃ hot water is used. T...

  • Common faults of ion exchanger
    • 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...

  • How to pretreat cation exchange resin?
    • 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, ...

  • How to pretreat anion exchange resin?
    • 2022-12-02

    2. Pretreatment of anion resin: 2.1 After the anion exchange resin is filled, backwash shall be carried out first to ensure 80% backwashing expansion rate to remove impurities and fine resin particles until the backwashing effluent is clear. 2.2 Feed 2-3% NaOH solution at a flow rate of 4m/h. When the outlet concentration reaches 1.5-2%, stop feeding and soak for more than 8 hours, and then rinse ...

  • Filling and Pretreatment of Anion and Cation Resins in Mixed Bed
    • 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...

  • How to prevent resin pollution? How to deal with the contaminated resin?
    • 2022-12-07

    What is the cause of resin contamination? The ion exchange resin is invaded by the suspended solids, colloids, organics, microorganisms, heavy metals, oxides and other harmful impurities dissolved in the water during use, which makes the performance of the resin significantly worse. In one case, the exchange capacity of the resin is significantly reduced and regeneration is difficult due to the bl...

  • Application prospect of strong acid cation exchange resin
    • 2023-03-30
    Application prospect of strong acid cation exchange resin

    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...

  • Application of ion exchange resin in beverage industry
    • 2023-03-31

    Ion exchange resins are widely used in the beverage industry for a variety of applications. They can be used to remove hardness ions, such as calcium and magnesium, from water, which can help reduce scaling in equipment and improve the taste of the final product. Special ion exchange resins can also be used to remove impurities such as heavy metals, organic compounds, and other contaminants from w...

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