Silica gel raw material manufacturers will introduce solid silica gel to you. In industry, water glass (sodium silicate) is used as raw material. It is hydrolyzed in acidic medium to form gel, and then it is made into silica gel through aging, washing, drying and other processes. According to the water content Different, translucent or white solid. Commercially available products include irregular granular, spherical, and microspherical silica gel, which are often used as catalyst carriers in fluidized bed operations.


When used as a catalyst carrier, the silica gel is usually impregnated into a solution containing catalytically active components to absorb the dissolved silica into the pores of the dry silica gel, and after drying and activation, the active components are distributed on the surface of the dry silica gel.

The pore structure of silica gel has an important influence on the properties of the negative wearing agent, such as the pore volume and pore size distribution of silica gel. Traditionally, silica gel with a small uniform pore diameter of 15-20 is called fine-pore silica gel, and a large uniform pore diameter of 40-50 is called coarse-pore silica gel, but the fine-pore structure is not conducive to the diffusion of dry reactant molecules, but can reduce the accompanying The utilization rate of the inner and outer surfaces of the agent is improved, and the product molecules generated deep in the pore barrier are not easy to escape out of the pore, and are easy to dry and cause deep side reactions. The pore structure of silica gel is related to the production method and conditions of the silica gel raw material manufacturer, such as the temperature and time of gelation, aging, and washing. The pores of commercially available silica gel can be expanded through the pore expansion method. The common method is to put it in dry hot-pressed gold and add water or a saline aqueous solution (such as sodium carbonate, sodium acetate) for hot-pressing treatment. For example: at 320°C, 10MPa hot pressing treatment can change the specific surface and uniform pore diameter of 135m2/a and 123 silica gel to 26.9m21g and 508 respectively.

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