Silica

Silica

Given below are some of the functions ofprecipitated silica.
1. The silica can be usedfor tire rolling resistance reduction and tire wet grip improvement.
2. Added into the rawmaterials for making shoes, joints, pipes and tires, etc. to improve modulus,tear strength and abrasion resistance, etc.
3.Silica can also be used as thickening agent formanufacturing glue, varnish, industrial paint, and toothpaste, etc.
4. Used for improving the transparency of toothpaste,silicone and shoe soles.
5. Silica can also be used as free-flow and anti-cakingagent for powders.
Hence, it is commonly used for manufacturing of organic andinorganic chemicals, and human and animal nutrition.
6. Added into raw materials for making paper and paints,silica also serves to improve whiteness.

Manufacturing Process
Precipitated silica is achieved by neutralizing a sodium silicate solutionwith an acid, typically sulfuric acid. The by-product, sodium sulfate, isfinally eliminated through filtration. Then, dry the remaining silica, andfinally finish the dried silica in variety of ways according to its finalapplications. The precipitation stage creates the microscopic particlestructure which determines the silica's application properties.

Precipitation, filtration, drying and finishing are the four key steps ofsilica production.

1. Precipitation
During the precipitation stage, silica properties may bevaried through changes in composition and ratio of reactants, reaction time,temperature and concentration. For instance, physical properties likestructure, chemical properties like PH value and silanol group density, and optical properties like whiteness and transparency, etc. areall resulted from the precipitation process.
2.Filtration
Salts formed during the precipitation stage arewashed out during filtration. Most of the water is eliminated at that stage.Filtration controls the final purity of silica.
3.Drying
After filtration, the silica is then dried.Dewatering process is necessary to maintain the desired silica applicationperformance.
4.Finishing
Finally,the dried silica can be finished in a variety of ways to reduce the size of theparticles formed during the drying process. Sinchem precipitated silicas are stored in silos before beingbulk loaded or packaged for shipment to customers.

Sinchem is aprofessional manufacturer of silica gel in China. We supply various products suchas silica sand, orange silica gel, delustrant and soon. Our products have high quality and competitive price. We produce silica sol, refrigeratordeodorant in one city. Our low production cost can save your purchasing cost. Amore detailed description of our product is shown on the page.
.