The Development of A Technology for the Purification of Sodium Chloride by Removing Impurities Using the Phosphate Method

Sodium chloride is widely used in medicine, food production, and chemical manufacturing, where product purity is critical. While high-purity NaCl can be obtained through existing methods, these often incur significant costs. Therefore, it is important to develop a more practical and cost-effective purification process. This study investigates the purification of table salt through the removal of insoluble residues and impurity ions using phosphate treatment.

Halite ore from the Bakhyt-tany deposit was processed. The study employed infrared spectroscopy (IR), scanning electron microscopy (SEM), and spectrometric analysis to assess purity levels and impurity removal efficiency.

The optimal liquid-to-solid phase ratio and mixing time were identified. The stoichiometric amount of sodium phosphate required to remove calcium and magnesium ions was established, achieving up to 99% impurity removal.

The phosphate method proved effective in significantly reducing bothт soluble and insoluble impurities in sodium chloride. The separation of precipitated impurities by sedimentation and subsequent spray drying of the purified solution provides a viable, cost-efficient alternative to conventional methods. Further investigation is needed to assess the scalability and environmental impact of the process.

The results enabled the development of a technological scheme for purifying sodium chloride using the phosphate method, offering high efficiency and practical applicability.