The separation of highly saline waters under various conditions is carried out using a nonconventional partial-desalting process. The method utilizes a series of chemical reactions involving the conversion of sodium chloride, the major constituent in saline waters, into sodium bicarbonate, which precipitates under the experimental conditions, anti ammonium chloride, which can be separated by crystallization. Experiments of absorption of carbon dioxide in an ammoniated brine have demonstrated the efficiency of the method. Interpretations using conversion parameters such as temperature, initial concentrations of ammonia, sodium chloride, and the ratio of NH3/NaCl are discussed.