Zeolite itself has a multi-regular pore structure, and its pores are comparable to the molecular size of general substances, with a diameter of about 0.3~1nm, and its specific surface area is as high as 400~800m2/g. The special physical structure makes zeolite have two adsorption characteristics: selective adsorption and efficient adsorption.

Rapid hemostasis is essential for first aid in war wounds, and tourniquets have been the first choice for battlefield treatment. With the changes in battlefield injuries and the development of hemostasis concepts, emergency hemostasis techniques have changed from physical hemostasis to chemical and biological hemostasis, so scholars in the field at home and abroad have developed and applied a variety of new hemostatic materials and methods.

From the multi-component system, some of the substances are extracted with appropriate liquid agents (or water) to make catalysts with porous structures. For example, the skeleton nickel catalyst is made by melting a quantity of nickel and aluminum in an electric furnace, and the melt becomes an alloy after cooling.

Each method for making catalysts is actually a combination of a series of operating units. For convenience, the name of the key and distinctive unit of operation is used as the name of the manufacturing method. The traditional methods include mechanical mixing, precipitation, impregnation, solution evaporation, thermal melting, immersion, ion exchange, etc. The new methods developed now include chemical bonding, fibrillation, etc.