The Role of Additives on the Barium Sulphate Crystallization

Department of Chemical Engineering, Istanbul Technical University, Istanbul, Turkey E-mail: eakyol@yildiz.edu.tr Manuscript Received online 10/20/2020, Accepted 11/15/2020 In the present study, synthesis of barium sulfate crystals (BaSO4, barite) is carried out by chemical precipitation method to investigate the effects of polystrene and alginate on particle size and morphology of crystals. As a second step of this research, the spontaneous precipitation of barite at 25 °C was investigated in the presence of polyacrylic acid (PAA), polyvinyl sulphonic acid (PVS) and polyethylene glycol (PEG). The degree of inhibition is measured as the reduction in initial crystallization rate, determined by conductivity of the crystallizing solution. SEM analysis of the crystals was made to determine the particle size and the morphology. The results have shown that the additives, used in this study, were effective in order to minimizing the particle size of the crystals and reducing the crystallization speed of barium sulfate