Kunshan Qi Lin Environmental Protection Technology Co., Ltd.
Contact: Business Office
Q Q: 3285891088
Address: Kunshan City, Jiangsu Province Economic
and Technological Development Zone Sheng Zhuang Road on the 18th
Silicone is one of the commonly used materials in monotone, the following about, how to reuse silica gel desiccant, the following three points to be careful:
A, silica gel adsorption of water after the regeneration:
After the silica gel absorbs the water, the water can be removed by the method of thermal desorption, there are many ways of heating, such as electric furnace, residual heat of flue and monotonous hot air.
Desorption heating temperature control at 120--180 ℃ appropriate, on the blue plastic indicator, color silicone, DL blue silicone is controlled at 100--120 ℃ is appropriate. A variety of industrial silica gel regeneration temperature should not exceed the following limits:
Rough silica gel shall not exceed 600 ℃; silica gel desiccant
Pore silica should not be higher than 200 ℃;
Blue plastic target agent (or color silica gel) shall not be higher than 120 ℃;
Silicone glue shall not be higher than 350 ℃. Silica gel desiccant
After the regeneration of silica gel, the water is generally controlled below 2% can be put into use from scratch.
Second, the use of silica gel desiccant again should be careful:
⒈ drying regeneration should be careful to gradually raise the temperature to prevent the drastic monotone caused the rubber particles burst, the decline in recovery rate.
⒉ on the roasting and regeneration of silica gel, the temperature is too high will cause changes in the pore structure of silica gel and significantly reduce its adsorption, affecting the use value. On the blue plastic indicator or color silica gel, desorption regeneration temperature should not exceed 120 ℃, otherwise it will be due to the gradual oxidation of the developer to lose color. Silica gel desiccant
⒊ Regenerated silica gel should generally sieve to remove fine particles, so that the particles are uniform.
Saike monotonous use in the process of adsorption of water vapor or other organic substances in the medium, the adsorption can decline, can be reused after repeated use.
Third, silica gel adsorption of organic impurities after the regeneration:
⒈ roasting method
About coarse-grained silica gel, can be placed in the baking furnace gradually warmed to 500 - 600 ℃, about 6-8 hours until the particles were white or brown to. On the pore silica gel, the firing temperature can not exceed 200 ℃. Rinsing method, the silica gel in the plump water vapor adsorption reached full after the exothermic water soak rinse, and can be combined with the use of scouring agent to remove oil or other organic impurities, and then washed with water after drying dehydration. Silica gel desiccant
2, solvent flushing method
According to the type of organic matter adsorbed on the silica gel, the organic solvent adsorbed in the silica gel is dissolved by using an appropriate solvent, and then the silica gel is heated to remove the solvent. Silica gel desiccant