Colloidal Silica can reproduce

After Colloidal Silica  water adsorption, thermal desorption method by removing the moisture, heat in different ways, such as electric stoves, flue waste heat such as heating and hot air drying.
Desorption temperature control in heating 120 - 180 ℃ is appropriate, for the blue Colloidal Silica indicator, Colloidal Silica ， DL type blue Colloidal Silica  is controlled at 100 - 120 ℃ appropriate. Variety of industrial Colloidal Silica  regeneration, the maximum temperature should not exceed the following limits: coarse pore Colloidal Silica  shall not exceed 600 ℃; pore Colloidal Silica  shall not exceed 200 ℃; blue gel indicator agent (or silica gel) shall not exceed 120 ℃; Alumina plastic shall not exceed 350 ℃. Regenerated Colloidal Silica  , the water is generally below 2% can control back into use.

Colloidal Silica adsorption machine impurities regeneration methods: ⒈ roasting method for coarse-pored Colloidal Silica, can be placed inside the roaster is gradually warming up to 500 - 600 ℃, after about 6-8 hours to Colloidal Silica  Particles can be white or brown. Of the pore Colloidal Silica  , calcination temperature can not exceed 200 ℃. ⒉ rinsing method, the Colloidal Silica in saturated water vapor adsorption reached saturation, heat water for rinsing, and combined with detergent to remove oil or other organic impurities, and then by water washing after drying dehydration.

⒊ solvent washing method, according to the Colloidal Silica adsorption of organic species, choose the appropriate solvent adsorbed on the silica dissolution in organic matter, and then removing the solvent by heating the Colloidal Silica.
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