⒈ calcination
For the coarse silica gel, can be placed within the gradually warming up to the roaster 500 - 600 ℃, after about 6-8 hours to rubber can be white or tan. Of pore silica gel, calcination temperature should not exceed 200 ℃.
⒉ rinse method
The silica gel adsorption in saturated water vapor saturation in the heat after soaking in water rinse, and combined with detergent to remove oils or other organic impurities and then washed by water drying dehydration.
⒊ solvent washing method
Adsorption of organic compounds based on silica gel, choose the appropriate solvent in the adsorption of organic matter in the dissolution of silica gel, silica gel and then heated to removal of solvent.

Regeneration of silica gel should pay attention to the problem
⒈ drying should be careful to take the gradual increase in regeneration temperature, so as not to burst particles caused severe drying and reduce the recovery rate.
⒉ regeneration of silica gel calcination temperature is too high will cause changes in pore structure of silica gel significantly reduced the adsorption effect of use value. Or discoloration of the Blue gel indicator silica gel, desorption temperature should not exceed regeneration 120 ℃, otherwise they will be gradually oxidized reagent lose color effects.
⒊ been regenerated silica gel should generally be sifted to remove fine particles, so that the particles evenly.