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What are the classifications of activated alumina ball desiccants

There are three common desiccants: silica gel desiccant (transparent particles), activated alumina ball desiccant (white particles), molecular sieve desiccant (brown beads). Apart from lime desiccants, the other two are non-toxic and environmentally friendly.

Activated alumina ball is a kind of desiccant, also known as alumina desiccant. Its raw material is the mixture of alumina hydroxide and calcined alumina. As we all know, aluminium hydroxide will expand and heat when heated, generating a lot of heat in an instant and dewatering. Under sufficient conditions, activated alumina ball desiccant may produce enough heat and adsorb a large amount of water when it meets water.

The main component of active alumina ball desiccant is alumina. When alumina meets water, it will produce a sharp chemical reaction and release a lot of heat in an instant. If the amount of calcined alumina in the bottle is relatively large, the heat generated by chemical reaction will cause the bottle to expand rapidly, and serious will cause the bottle to burst. If the quantity is small or the cap is not sealed, alumina may heat the plastic bottle.

Therefore, not all desiccants will explode when they encounter water. Even molecular sieve desiccants need at least two conditions, that is, to place desiccants in a closed space and to expand sufficiently when they encounter water. All people in contact with the desiccant at the same time, do not worry about its explosion. The first step is to determine whether it is a zeolite desiccant. The method is simple. Observe its shape and color. The desiccant we often come into contact with is alumina desiccant.

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