Investigation of the Process of Saturation of the Filter Liquid of Soda Production with Ammonia and Carbon Dioxide in the Production of Ammonium Chloride

摘要

This paper is focused on the saturation process of the filter liquid of soda production with ammonia and carbon dioxide in the production of ammonium chloride. In the world practice, there are many ways to produce ammonium chloride from the filter liquid. These ways of ammonium chloride production suppose progressive saturation of the filter liquid with ammonia and carbon dioxide. This paper is focused on identifying the optimal conditions for conducting the process. For this purpose, the saturation of the filter liquid with gases both in sequential and simultaneous feeding to the apparatus at total flow of 1.5-6.0 dm~3/min and at temperature of test solution of 15-50°C was studied. The comparison of material balances of consecutive and simultaneous supply of ammonia and carbon dioxide shows that the process in one apparatus allows reducing the gas consumption factor by approximately 14.4%. Thus, as a result, the method for simultaneous supply of gases is proposed in order to obtain high degree of saturation with ammonia and carbon dioxide of the filter liquid followed by the production of ammonium chloride by the salting out method.