Reaming of silica gel

Reaming of silica gel

The preparation methods of special silica gel suitable for different purposes are also different

(1) Reaming with high pressure steam

Put silica gel and distilled water in the autoclave, and then heat to the required pressure for a certain period of time.

Table 4-26 The effect of high-pressure steam treatment on the pore structure of silica gel

Salt solution can also be used to replace distilled water when expanding the hole with high-pressure steam, which can reduce the pressure and shorten the time

(2) Roasting and expanding with salt

A certain amount of silica gel is mixed with a certain concentration of salt solution, first dried at a low temperature, then calcined at a high temperature, washed and dried to obtain a pore-expanded silica gel

Table 4-27 The effect of salt roasting treatment on the pore structure of silica gel

Related links: Physicochemical properties and preparation methods of silica gel