Method for repeated use of silica gel desiccant
Desiccant refers to a substance that can remove part of the moisture in a damp substance to prevent moisture and mildew. We often see desiccant inside the snack packaging, that is, quicklime desiccant, which cannot be eaten by humans or animals. The silica gel
desiccant is a different kind of silica gel packed in moisture-permeable sachets. The main raw material silica gel is a kind of high-microporous hydrous silica, which is non-toxic, odorless, odorless, chemically stable, and has strong moisture absorption properties. A highly active adsorption material.
Silica gel desiccant
is usually prepared by reacting sodium silicate and sulfuric acid and undergoing a series of post-treatment processes such as aging and acid foaming. Silica gel is an amorphous substance, and its shape is transparent and irregular spheres. Therefore, it is widely used in the storage and transportation of instruments, meters, equipment, leather, bags, shoes, textiles, food, medicines, etc., to control the relative humidity of the environment to prevent items from being damp, mildew and rusty.
There are two types of silica gel desiccants
, one is white transparent particles, the other is blue particles, also called discoloration silica gel. This discoloration silica gel is toxic and can only be used in small amounts. The following describes how to reuse silica gel
1. Disassemble the bag of desiccant (if it is placed directly in the microwave oven for baking, first, the outer wrapping paper will be deformed, and second, the outer wrapping paper may burn, which is very unsafe. The particles in the desiccant must be taken out ), be careful not to spill the desiccant particles, which is difficult to clean up.
2. Use a container that can be used in a microwave oven to fill the desiccant. According to the power of the microwave oven, pay attention to the heating temperature not to be too high. Too high temperature will cause the desiccant particles to burst.
3. After 15 minutes of baking, be sure to cool naturally for more than 10 minutes before baking once, so that the moisture absorption performance of the regenerated desiccant particles is the best to recover.
4. After finishing the above 3 steps, the desiccant can be reused. Try to pack it yourself. The easiest way is to use silk stockings. The stockings with silica gel desiccant
particles should not be too thin to avoid damage. If the stockings are very thin, it is recommended Use two layers.