Product Description

 The wet/ process is based mainly on the precipitation of amorphous silicon dioxide particles from aqueous alkali metal silicate solution by acid neutralization. Usually, sulfuric acid is used, although carbon dioxide and hydrochloric acid can be used. Depending on the final pH of the solution, t he following two different classes of synthetic amorphous silicas can be obtained: precipitated silicas - obtained in neutral or alkaline conditions; silica gels - obtained under acidic conditions. The main manufacturing steps include precipitation, filtration, washing, drying and grinding.