• 2023-04-18

Ion exchange resins are largely driven by the needs of industry. Industrial applications for ion exchange resins include water treatment, chemical processing, pharmaceutical production, food and beverage processing, and more. Common uses of ion exchange resins include removing dissolved salts from water, softening hard water, purifying chemicals and pharmaceuticals, recovering valuable metals from...

• 2023-04-12

Ion exchange resins have been developed in the United States since the 1950s. Early research focused on developing cation exchange resins for water softening and deionization applications. The first commercial ion exchange resin was introduced in 1956 by Dow Chemical Company. Since then, ion exchange resins have been used in a variety of applications, including water treatment, food processing, ph...

• 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...

• 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...

• 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 ...

• 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, ...

• 2022-11-28

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...

• 2022-11-23

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/...

• 2022-11-18

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...

• 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...