Treating wastewater from the soda industry is a complicated and lengthy process, requiring a great deal of labor and financial resources. No method has yet been developed to eliminate the environmental damage caused by the soda industry entirely. The work focused on the removal of chloride, sulfate, calcium, and magnesium from soda production wastewater by precipitation using organic solvents such as isopropylamine (IPA), diisopropylamine (DIIPA), propylamine (PA) and ethylamine (EA) in various proportions. Statistical modeling through Bayesian beta regression was used to select the amine most effectively removing the tested ions in precipitate form. The effect of precipitating agent dosage on the pH and conductivity of the solution was also investigated. Samples of wastewater obtained from the soda industry were characterized by high values of pH (up to 11.9), specific electrolytic conductivity (up to 128 mS cm-1), and high concentrations of sodium (up to 13 g L-1), chloride (up to 60 g L-1) and calcium (up to 24 g L-1) ions. Solvent-based precipitation showed that organic solvents are effective in precipitating salts from wastewater from the soda industry. Sulfate and chloride removal efficiencies of 85.1 and 34%, respectively, were observed. Statistical analysis showed that isopropylamine was the most effective amine for removal.