DefinePK

Abstract

One of the methods to prepare nano-crystals metal oxide (MgO) is by using a precipitation method. Magnesium oxalate as a valuable chemical almost produced in pure grade from seawater bittern by precipitation process. In this paper, kinetics of magnesium oxalate precipitation from sea bittern was studied. The rate constants determined at different temperatures, Molar ratios and pH. The activation parameters were also calculated. Sea bittern from salt production unit of El-Mex saline company is containing about 85.7 g.L-1 Mg2+. Detailed characterization involving XRD, TEM and TGA was investigated. The results show that The precipitation of magnesium oxalate from sea bittern is first order with respect to the concentration of magnesium oxalate at pH=4, MR=1:1 and temp.=25°C Also, The rate constant doesn't strongly affected by increasing temperature so the optimum operating reaction temperature is 25°C. The spherical Magnesium oxalate with uniform diameter of about 0.5 µm was obtained with purity higher than 98%.