Wang Yuhong Chen Jianfeng

(Center of High Gravity Engineering and Technology,Beijing University of Chemical Technology,Beijing 100029)

Abstract

The synthesis of nano-sized cubic CaCOs by the high-gravity reactive precipitation in a rotating packed bed reactor(RPBR)were studied. The effects of high gravity acceleration,liquid flow volumetric rate,gas flow volumetric rate and initial concentration of Ca(OH)₂on the carbonation reaction time and the mean particle size and variance of particle size distribution of CaCOs were investigated. The results showed that the CaCOg particles with the mean size of 15～40nm and very narrow size distribution were produced,and the carbonation reaction time is 4~10 folds shorter than that of using conventional carbonation method.

Keywords：high-graviy reactive precipitation ;nanometer;calcium carbonate