There is no silicone product processing in Northeast China

Yes, you can search: North Silicone Products Factory, Northeast Silicone Products Processing.

Solid grinding hand body silica gel is industrially made of water glass (sodium silicate) as raw material, hydrolyzed in an acidic medium to form a gel, and then made into silica gel through aging, washing, drying and other processes, depending on the water content, translucent or white solid. Commercially available products include irregular granular, spherical, and microspherical silica gel, the latter of which has good wear resistance and is often used as a catalyst carrier in fluidized bed operations.

When used as a catalyst carrier, the silica gel is usually impregnated in a solution containing catalytic active components, so that the solution is absorbed in the pores of the silica gel, and the active components are distributed on the surface of the silica gel through drying, activation and other procedures. The pore structure of silica gel has an important influence on the properties of the supported catalyst, such as the pore volume and pore size distribution of silica gel. It is customary to refer to silica gel with an average pore size of less than 15 20 to be called fine-porous silica gel; The average pore size is greater than 40 50 , which is called coarse-pore silica.

The silica gel with a fine pore structure has a high specific surface area, which is conducive to catalyzing the dispersion of active components. However, the fine pore structure is not conducive to the diffusion of reactant molecules, that is, it is not easy to touch the catalytic active components hidden deep in the pores, so it will reduce the utilization rate of the inner surface of the catalyst, and the products generated in the depths of the pores are not easy to escape from the pores, which is easy to cause deep side reactions. The pore structure of silica gel is related to the manufacturing method and conditions, such as gelatinization, aging, pH, temperature, and time during washing.

The commonly used method is to place it in a hot autoclave and add water or add a saline aqueous solution (such as sodium carbonate and sodium acetate) to hot press treatment, for example, in MPA hot pressing treatment, the specific surface and average pore size of 135m2 g and 123 silica gel can be changed to 508.

In addition to solid silica gel, liquid silica sol is also an important carrier material, and the ion exchange method is usually used to desodium to make silica sol in industry. It is a translucent milky white liquid, the silica content in the market is generally 20 30, the high can reach 50, of which the diameter of the rubber particle is 100 200, and some commodities reach 1300. High concentrations of colloidal silica are usually stabilized with the help of trace amounts of sodium oxide.

When the silica sol dries, it becomes a porous solid. For example, in the production of acrylonitrile (phosphorus-molybdenum-bismuth-oxy) silicon oxide catalyst from acrylic ammonia oxidation, a solution containing active components is mixed with silica sol and spray dried to make a microspherical catalyst.

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