Mass production of nanoparticles by high gravity reactive precipitation technology with low cost

Abstract

Mass production of nanoparticles at low cost has attracted much attention from industrial and academic circles. In this paper, a novel method, the high gravity reactive precipitation (HGRP) technology, of manufacturing CaCO 3 nanoparticles, presently scaled-up to an annual capacity of 10,000 tons, is presented. This paper describes the process principle, the process design and experiments on the syntheses of 15-30 nm CaCO 3, 30-50 nm SiO 2, 20-30 nm TiO 2, 20-60 nm ZnO, 20-30 nm ZnS, 30 nm SrCO 3, 40-70 nm BaTiO 3, stick-like nano BaCO 3 as well as nano-fibrillar aluminum hydroxide measuring 1-10 nm in diameter and 50-300 nm in length, using liquid-liquid, gas-liquid and gas-liquid-solid reactant systems. The advantage of using the HGRP technology is illustrated by comparison to conventional methods.