Effect of Additives on the Sedimentation Rate of Magnesium Hydroxide

Abstract

The aim of this study is to explore the effect of addi• tives and the influence of the complete and incomplete precipitation on the rate of sedimentation of magnesium hydroxide obtained from synthetic solutions of magnesium chloride and desulphated bittern. This thesis is divided into five chapters. The first one is the theoretical part which indicates the different sources of magnesium ions, the prepar• ation of magnesium hydroxide from bittern, pretreatment of the bittern, precipitation of magnesium hydroxide using different bases, sources of precipitating agents, settling process, settling of magnesium hydroxide and factors affecting the sedimentation rate of magnesium hydroxide. The second one is the experimental part and begins wit illustration of the specifications of the raw materials used in this work, followed by description of experi• mental set-up used in bench and pilot scale studies and experimental technique.