Precipitated Silica from Rice Husk Ash

Hydromet has successfully demonstrated its patented technology at Hydromet Research Centre to produce precipitated silica from rice husk ash (RHA) provided by client from it’s existing power plant. Precipitated silica, a synthetic form of amorphous silica, is created through a controlled reaction between a silicate solution—typically sodium silicate—and a mineral acid, such as sulfuric acid. This process generates small, porous silica particles with a high surface area, making precipitated silica a versatile additive used across industries, including rubber, tires, paints, cosmetics, and personal care. Producing precipitated silica from rice husk ash presents several substantial advantages, particularly in terms of cost-efficiency, environmental sustainability, and material properties. This combination of economic, ecological, and practical benefits makes RHA-derived precipitated silica a highly attractive alternative for various commercial applications.