1, the silicic acid gel with cobalt chloride solution and then dried and soaked activation may have to let Silastic discoloration. When using it as a desiccant, before water is blue, the water turns red, the color change can be seen from the extent of absorption, as well as the need for regeneration treatment. Silicone rubber is also widely used in aspects of the vapor recovery of the catalyst prepared in petroleum refining, and the like. 
2, the silicone rubber is a suitable silicate gel mSiO2 · nH2O dehydration from the porous material of different particle sizes. Has an open porous structure, surface area (surface area per unit mass) is large, can absorb many substances, is a good desiccant, adsorbent and catalyst carrier. 
3, the adsorption of the silicone rubber is mainly physical adsorption, can be regenerated and used repeatedly. An alkali metal silicate with acid (such as sodium) solution, and acidified, and then adding a certain amount of the electrolyte is stirred, the silicic acid gel; or add more concentrated acid or sodium silicate solution ammonium silicate can also generate gel. The silica gel was allowed to stand for several hours for aging, and then washed with hot water soluble salts, at 60 ~ 70 ℃ dried and activated at about 300 ℃, the silica gel can be obtained. 
4, silicone rubber is a highly active adsorption material is amorphous material, its chemical formula is mSiO2 · nH2O. Insoluble in water and any solvent, non-toxic, odorless, chemically stable, does not react with any substance except alkali, hydrofluoric acid. Various types of silica is formed due to different manufacturing methods of different pore structure. Chemical composition and physical structure of silica gel, and determines that it has many other similar material was difficult to replace characteristics: high adsorption properties, good thermal stability, chemical stability, high mechanical strength. Silicone based on its pore size is divided into: large pore silica, silica rough hole, B-type silica gel, silica pores.