Precipitated silica with fine particle size and narrow particle size distribution finds many applications in polymer/elastomer, thixotropic agent in paints, cosmetics, toothpaste and carrier for insecticide and pesticides. Precipitated silica is used as an alternative to carbon black in the tyre industries.

A process for the preparation of precipitated silica having more than 75% particles finer than 10 m on 5 kg batch scale has been developed. In the process neutral grade sodium silicate solution was treated with mineral acid and silica sol in different steps under controlled rate in presence of electrolyte. Expertise is available to produce precipitated silica powder of different grades/ specification for various applications using sodium silicate, siliceous waste materials like kimberlite earth as starting materials, rice husk ash (RHA)

5 Kg/batch and can be up-scaled depending upon the demand.

With stringent environmental regulations and demand for alternative for carbon black, the PPT silica has an excellent opportunity as a suitable replacement for carbon black in tyre industries.

The process generates acidic effluent containing sodium sulphate which can be treated using appropriate technique to recycle/reuse DM or RO water.

Neutral grade sodium silicate (liquid/solid), siliceous waste materials like kimberlite, Mineral acid (sulphuric acid), sodium sulphate, RO or demineralized water etc.

Raw material, storage tanks, solution preparation tanks, jacketed reactor with stirrer, pumps, filter press, spray drier, packing unit etc.

Robust technology with capability to use waste and economic raw material for the preparation of precipitated silica will make the process techno-economically feasible and competitive in the open market.

Process know-how for precipitated silica for customer desired grades; Demonstration of the process; License fee, royalty and other financial details are available on request.