Type 1 and Type 2 both exhibit strong base and have salt splitting capacity, allowing them to exchange anions over the entire pH range and are widely used. Type 2 has lower basicity than Type 1, resulting in higher regeneration efficiency but the ion leakage is also higher than Type 1. Therefore, Type 2 can be expected to have higher regeneration efficiency, while Type 1 can be used to guarantee high purity treated water.

The typical SBA exchange resin is a styrene-based gel type and a porous type with enhanced porosity can also be selected through a special production process. The chemical structure of the porous type SBA exchange resin is the same as the gel type, but it has a large number of pores on its surface and has a higher surface area than the gel type. The porous type ion exchange resin has a high porosity and surface area, allowing for effective ion exchange even in nonpolar or high-viscosity solutions. Also, the porous type resin has a better reaction rate and decolorization ability compared to the gel type, and it has a high resistance to organic pollution, swelling strength, and shrinkage strength. However, due to the higher moisture content inside, its exchange capacity may be lower than that of a gel type resin.

When selecting an SBA exchange resin, using the gel type may be more cost-effective for general water treatment or treatment of polar solutions with less severe conditions, such as low viscosity solutions, since the production process of the porous type is more complex and therefore the unit price is higher. In the case of a porous type, high performance can be expected when used for harsh processing conditions (high temperature, high pressure),
non-polar solvent treatment, and high viscosity liquid treatment.

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