Q: What are the common water absorbing agents? What characteristics do they possess?

Q: What are the common water absorbing agents? What characteristics do they possess?

Answer:Common water absorbing agents include silicone gel and calcium chloride

1. Silicone:The alias is silicic acid gel, a highly active adsorption material, which belongs to amorphous substance. The main component of silicone is silicon dioxide, which is chemically stable and non combustible. Silicone is a transparent or milky white granular solid.

If it absorbs moisture, some silicone gel can absorb up to 40% or even 300% moisture. Used for gas drying, gas absorption, liquid dehydration, chromatographic analysis, and also as a catalyst. If cobalt chloride is added, it will turn blue when dried and red after absorbing water. Renewable and reusable.

2. Calcium chloride:A salt composed of chlorine and calcium elements. Slightly bitter, tasteless. A typical ionic halide that appears as white, hard fragments or particles at room temperature. Due to its tendency to absorb moisture and undergo deliquescence in the air, anhydrous calcium chloride must be stored in a sealed container.

Calcium chloride and its hydrates and solutions have important application value in various fields such as food manufacturing, building materials, medicine, and biology. Calcium chloride has outstanding adsorption capacity and low desorption temperature for ammonia, and has great application prospects in the adsorption and separation of synthetic ammonia.

Extended Information

Water absorbing agents should have the following properties:

(1) Under the working conditions of the dehumidifier, it has a relatively high solubility to reduce consumption;

(2) Under the working conditions of the dehumidifier, there is a lower vapor pressure;

(3) At the operating temperature, the viscosity should be low to improve the flow conditions inside the dehumidification tower, increase absorption rate, reduce bouncing power consumption, and minimize heat transfer resistance;

(4) It should have the characteristics of non toxicity, non corrosiveness, non flammability, non foaming, low freezing point, low price, and chemical stability as much as possible.