Silica Gel Desiccant from China is a relatively common desiccant in our daily life and production. Because Silica Gel Desiccant from China has its own characteristics and is used in many industries, what if you choose Silica Gel Desiccant from China with good quality? Silica Gel Desiccant from China is actually reusable. Do you know how to recycle it? This is what I am going to explain to you today.

First of all, let's talk about two methods to identify the quality of Silica Gel Desiccant from China:
1. For the hygroscopic agent with a discoloration indicator, it can be judged by simply color discrimination. The relationship between relative humidity and blue silica gel chromatography is: when the relative humidity is 3-5%, the silica gel is blue, and when the relative humidity is 20%, the silica gel is blue. Dark gray, khaki silica gel at 40% relative humidity. When the relative humidity is 60%, the silica gel is pink,
2. There are two ways to check and judge the hygroscopic agent of the non-discoloration indicator: one is the dry and wet weight comparison method, which is to take out 50-100 grams of the hygroscopic agent in use. Weigh the weights before and after drying respectively. If the weight after drying is reduced by more than 23-25% than before drying, it means that the hygroscopic agent has failed; the second is the intuitive feeling method. Silica gel is white and transparent when it is dry and effective, and it is invalid when it becomes beige or maroon color. If it can adhere immediately on the tongue surface, it is effective, but no adhesion means it has failed.
Then let's talk about how to re-use Silica Gel Desiccant from China for a second time. The expired hygroscopic agent should be carefully dried and re-used before use. There are two ways to restore:
One is the oven baking method. The method is to put the hygroscopic agent into the drying box and bake it, or it can be heated to between 200°C and 400°C by slump baking, and continue stirring and baking for 2 to 6 hours;
The second is the hot air drying method. Lay the moisture absorbent in layers. Blow high temperature hot air from 250°C to 300°C into the interlayer, the drying time is 2 hours at 250°C, and only about 30 minutes at 300°C.
The hygroscopic agent after drying and rejuvenation should always be kept dry. In order to prevent moisture failure during storage, it can be stored in an oil-sealed porcelain, iron, or plastic container. If it is needed, it can be unpacked. Once it is found that the stored hygroscopic agent has expired, it must be refreshed in time and then stored for the next use.