A high-throughput tubular reactor for preparation of ultrafine barium sulfate

Conventional barium sulfate is characterized by large particle size, crude manufacturing processes, and inferior quality. Conversely, ultrafine barium sulfate offers significant enhancements in product quality and broadens its range of applications. To achieve industrial-scale production of high-quality ultrafine barium sulfate, characterized by reduced particle size and narrow particle size distribution, a high-throughput tubular reactor was employed. Ultrafine barium sulfate with small particle size and narrow distribution can be effectively prepared without amplification effects using a high-throughput tubular reactor. This study investigates the influence of reactant concentration and feed flow velocity on particle size. The particle size of ultrafine barium sulfate exhibits a trend of decreasing and then increasing with the increase in reactant concentration. A minimum particle size of 28.17 nm can be achieved when the concentration of the reactant material is 1.2 mol L⁻¹. The particle size decrease with an increase in the flow velocity of the reaction material. A minimum particle size of 28.17 nm for ultrafine barium sulfate can be achieved at a flow velocity of 10.42 m s⁻¹. Furthermore, the product’s particle size and morphology were characterized utilizing a BET specific surface area analyzer and scanning electron microscope.