Abrégé

The method of producing soda ash and calcium chloride provides an environmentally friendly method of producing soda ash and calcium chloride without the production of waste and hazardous byproducts. The method of producing soda ash and calcium chloride is initiated with a volume of brine (10), which is ammoniated with gaseous ammonia to form ammoniated brine (20). Limestone (30) is heated to produce calcium oxide and carbon dioxide (40). The ammoniated brine (20) is reacted with the carbon dioxide to produce sodium bicarbonate, ammonium chloride and a brine effluent (50). The sodium bicarbonate is then calcined and decomposed to produce soda ash and gaseous carbon dioxide (80). The calcium oxide is reacted with the ammonium chloride to produce calcium chloride, water and ammonia (90). The ammonia is recycled to be used in the initial step of ammoniating the brine (100). The water and the brine effluent are also recycled and used to provide the brine in the initial step (110, 120).

Classes IPC  ?

• C01D 7/18 - Préparation par le procédé de la soude à l'ammoniac
• C01F 11/24 - Chlorures