Random packing
　　Random packing is geometry sized granulose which is piled randomly inside of towers. Together with concerning tower apparatus, random packing could be widely used in absorption, desorption, distillation, drying and extraction during the heat transfer process of gas-liquid or liquid-liquid transfer. It is also widely applied in fields like reacting distillation, fluidized drying and hyper-gravity separation. According to the latest research overseas, random packing has a better performance in absorption and high distillation of liquid-liquid extraction, or liquid-gas ratio is pretty high. Nevertheless, in the fields like as purification, petrochemical and coking, random packing is wildly used.
　　Tendency of research in random packing currently
　　The research in random packing currently mainly focuses on several subjects:
　　1.    self structuring of random packing;
　　2.    development and invention of new tower type;
　　3.    the compounding of function
　　4.    improve the effectiveness in transferring by modify the packing surface;
　　5.    Combined Packing-Tray
　　
　　IMPAC: Packing
　　IMPAC packing was first announced by Lantc Company. IMPAC is a combination of flat, ring and intalox structure, and also can be considered as the joint of ten or more consecutive intalox pickings. By using the technique of multi-layer-bar, winkled in the wall, terminate blind area in machines and cross nesting of monomers, still, with its combination of both structured packing and random packing, IMPAC packing is wildly used in cooling tower. IMPAC packing has an excellent performance in water drop separation and self distribution. There are more than 50,000 within in every cubic meter. The effectiveness can be heightened by 40%. And its life span could be 10 years which effectively lower the cost.
　　The tendency of development in random packing is to increase porosity and surface area, lower the pressure drop, and improve the moisture, meanwhile being diversity in function.