“NAVOIYAZOT” AJ KAUSTIK SODA ISHLAB CHIQARISH MAJMUASIDA ISHLATILGAN IKKILAMCHI SULFAT KISLOTA TARKIBINI OʻRGANISH VA TOZALASH JARAYONINI TADQIQ QILISH

Sulfuric acid is now widely used in many aspects of the chemical industry, resulting therefore the formation of intermediate and sulfuric acid solution appear. In many cases, it is necessary to recycle these solutions to recover or use sulfuric acid. During many years of industrial practice, several methods have been developed to take sulfuric acid solutions formed under different conditions. In this article we consider the composition of secondary sulfuric acid used in the production of caustic soda of JSC "Navoiyazot" and its purification process. At the caustic soda production complex of JSC "Navoiyazot", a 98% solution of sulfuric acid is used to retain the moisture of chlorine gas formed by electrolysis of salt solution. As a result, sulfuric acid receives moisture in the process and is partially saturated with chlorine, the concentration of which is reduced to 73-75%. The concentration of the formed secondary sulfuric acid is increased by evaporation. The results show that the concentration of secondary sulfuric acid reaches 82,91% and the chlorine content decreases to 85,36%. This expands the use of secondary sulfuric acid generated in the process.