Process to produce sodium carbonate and/or sodium bicarbonate from an ore mineral comprising sodium bicarbonate according to which : €¢ a production solution comprising sodium carbonate is introduced into the less basic compartments of an electrodialyser comprising alternating less basic and more basic adjacent compartments separated from each other by cationic membranes, the more basic compartments being delimited by the anionic faces of bipolar membranes on one side and by the cationic membranes on the other side; €¢ a solution comprising sodium hydroxide is produced into the more basic compartments, by combination of the flux of sodium ions crossing the cationic membrane and the flux of hydroxyl ions crossing the anionic face of the bipolar membranes; €¢ the solution comprising sodium hydroxide is extracted from the more basic compartments of the electrodialyser and used to constitute a reaction solution; €¢ the reaction solution is put into contact with the mineral ore comprising sodium bicarbonate in order to form a solution comprising sodium carbonate; €¢ the solution comprising sodium carbonate is divided into a part which is used to constitute the production solution and a remaining part which constitutes a produced solution.
展开▼
