Ziyodullo Otakuziyev¹ , Diyorbek Absattorov¹ , Mohamed Rifky^1,2 , Shokir Rakhimkulov¹ , Ilkham Usmanov¹ , Dilbar Ramazonova¹ , Zaynobiddin Matkarimov³ , and Murodjon Samadiy¹

¹ Yangiyer branch of Tashkent Chemical Technological Institute, Department of Chemical Technology of Inorganic Substances, Yangiyer, Uzbekistan

² Eastern University, Sri Lanka, Chenkalady, Sri Lanka

³ Tashkent Chemical Technological Institute, Tashkent, Uzbekistan

Abstract

The conducted studies on the concentration of brine from lakes Karaumbet and Barsakelmes under conditions close to industrial ones showed the possibility of obtaining practically pure sodium chloride and magnesium chloride melt. To do this, the evaporation process must be carried out in two stages. The evaporation to a density of 1.550 g/sm3 increases the content of magnesium chloride from 7.20% to 28.24%. At the same time, the content of sodium ions decreases from 8.05% to 0.91%. The evaporation at the first and second stages must be carried out to a density of 1.340-1.345 g/sm3 , which contributes to the release of sodium chloride into the precipitate. The evaporation of the mother liquor makes it possible to obtain practically pure sodium chloride. The content of magnesium chloride after evaporation in the first stage is 15-16%.