1. Introduction
For the active alumina, there are such varied merits, for instance, the properties of absorption, catalytic activation, porous, higher dispersion, and larger specific surface areas etc. It adapts to the drying of many gases and liquids, Further, it can be applied to as the absorbents, drying agents, catalysts, and carriers during many reactions in the fields of the petroleum, chemical fertilizer, and chemical industry.

　　2. Types of product
For the active alumina, there areγand X-P assortments according to the inner main crystal phase.
In accordance with the usage, it can be divided into the active alumina absorbent, the active alumina drying agent, and the active alumina catalyst carrier.