Brine Purification for Chlor-Alkalis Production Based on Membrane Technology

Abstract

The experimental work is concerned to process and schematic methodology to reduce the percentage of sulfates and also to minimize the concentration of other impurities such as Calcium and Chlorate. The technology used in this study is a unique combination of primary and secondary treatment of raw brine to prepare a feed for the production of chlor-alkalis. A series of experimentation was conducted for the determination of major constituents and other trace metals in the brine using ICP spectrophotometer. The major elements determined were sodium, calcium, magnesium, potassium, strontium, sulfur and chloride. The trace metals determined were iron, barium, silicon, nickel, manganese, chromium, copper and boron. The influence of different parameters like concentration, temperature, pressure, impurity, pH, resin capacity was studied experimentally. On the basis of data collected and their analysis it can be concluded that best results are obtained when the treating chemicals Na2CO3, NaOH and Flocculating agent (Anionic) may be added to brine as a separate addition point