1, mainly used as desiccant: it can dry alkaline and neutral gases. Because it is a solid desiccant, it is usually placed in a U-shaped tube or a spherical drying tube.

2. It can also replace sodium hydroxide. For example, in the preparation of ammonia \ methane gas, the heating temperature is high, so sodium hydroxide corrodes the glass seriously, which is easy to absorb moisture and agglomerate, and the generated gas is not easy to be released, while alkali lime does not corrode the glass strongly and has good air permeability.

3. Alkaline lime is also called sodium lime. Alkaline lime is white or beige powder, which is loose and porous. It is composed of calcium oxide (CaO, about 75%) and water (H? O, about 20%), sodium hydroxide (NaOH, about 3%), potassium hydroxide (KOH, about 1%).