Precautions of calcium chloride desiccant reuse

Calcium chloride desiccant, also known as desiccant and dehumidification box, is a chemical that can absorb moisture in the ambient air. The principle is to utilize calcium chloride, which has strong hygroscopicity and adsorption properties. It can form hydrates after absorbing moisture in the air, effectively reducing the humidity in the environment. Calcium chloride desiccant reuse is one of the topics that people often pay attention to. In fact, calcium chloride desiccant can be reused.

What are the characteristics of calcium chloride desiccant?

Calcium chloride desiccant is a highly efficient adsorption material whose main components are calcium chloride and gum starch. Chemically, water molecules react with calcium chloride, absorbing moisture from the surrounding environment and converting it into a gel, thus achieving an adsorption effect, thus completely eliminating any possibility of leakage. Common silica gel desiccants can only absorb 10%-27% of their own weight, while calcium chloride desiccants can reach 300%. The moisture absorption rate is 8-15 times that of ordinary desiccants. After completely absorbing moisture, it will not evaporate.

Calcium chloride desiccant is widely used in clothing, books, food, warehouses and other occasions where a dry environment needs to be maintained. When using calcium chloride desiccant, you generally need to open the packaging bag of the desiccant first, place it in an environment that needs to be kept dry, and then wait for a period of time. The desiccant will automatically absorb the surrounding moisture and become relatively moist. How to achieve calcium chloride desiccant reuse after a long period of dehumidification?

1. Pay attention to the moisture content of the calcium chloride desiccant after absorbing moisture

Calcium chloride desiccant will form hydrates after absorbing moisture, and contains a high amount of moisture. If it is used directly again at this time, the effect will be greatly reduced. Therefore, wait until it is fully dry and measure its moisture content before reusing it. If the water content is not very high, you can continue to use it.

2. The packaging bag needs to be replaced when doing calcium chloride desiccant reuse

Reusing calcium chloride desiccant in an already used calcium chloride desiccant bag will affect its moisture absorption effect. It is recommended to replace it with an independently sealed bag to maintain sufficient dryness and accelerate dehumidification.

3. Select the number of calcium chloride desiccant reuse according to the actual situation

Although calcium chloride desiccant can theoretically be reused, the number of reuses of calcium chloride desiccant is not clearly defined and needs to be determined based on actual conditions. If the humidity is relatively small, the desiccant has a strong moisture absorption capacity, and there is no problem in reusing it more times; but if the environment is humid, the moisture absorption effect of the desiccant will gradually decrease after multiple uses.Unless there is no other option in an emergency, it is generally recommended to replace the desiccant with a new one.

4. Choose the right brand

In order to ensure that the calcium chloride desiccant can fully function, it is recommended to choose a regular and reliable brand, and understand the brand's R&D strength and production status in order to choose suitable materials and designed products.

5. Reuse calcium chloride desiccant through heat treatment

Anhydrous calcium chloride is a common calcium chloride that can also be reactivated and then reused. The water absorbed by the desiccant can be removed by heating it to a high temperature of 300 degrees Celsius until the water evaporates, leaving only calcium chloride. After absorbing water, the calcium chloride desiccant can be heated to Calcium Chloride Hexahydrate (CaCl2·6H2O), and then loses crystal water and returns to its original state. This process is similar to the reuse of silica gel. When using it, we must operate it according to the actual application environment, and recycle it in time after use to avoid contamination and affect the subsequent secondary use effect.

Calcium chloride is a white crystalline substance that is highly soluble in water and is an effective hygroscopic agent due to its hygroscopic properties. Like silica gel, calcium chloride comes in different forms, including granules, flakes, and powder. This desiccant absorbs moisture faster than silica gel and is widely used, making it an excellent choice for quick-drying requirements.

Most of us throw away products after using them, but only a few know that they can be reused. Their lifespan depends on the environment they are exposed to, but most can last between 1 and 3 years. Although calcium chloride desiccant can be reused, you need to pay attention to details such as the moisture content of the desiccant, changing the packaging bag, and selecting the number of reuses according to the actual situation. It is recommended to fully understand its characteristics when using it and strictly follow the instructions to achieve the best moisture absorption effect.