摘要:
Process to produce sodium carbonate according to which : • a first 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 second production solution comprising sodium carbonate is introduced into the more basic compartments of the electrodialyser; • 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 reacted with sodium bicarbonate in order to form a produced solution comprising sodium carbonate.
摘要:
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.
摘要:
Provided is a calcium carbonate generation method and system in which calcium carbonate having a high purity can be generated using a calcium-containing waste. Provided is a calcium carbonate generation method of generating calcium carbonate from a calcium-containing waste, the calcium carbonate generation method including: a calcium dissolution step of adding aqueous hydrochloric acid to a calcium-containing waste and dissolving calcium to generate an aqueous solution containing a calcium ion; a separation step of adjusting a hydrogen ion concentration index of the aqueous solution containing a calcium ion and separating a component containing at least one selected from the group consisting of Si, Al, Mg, and heavy metal from the aqueous solution; and a calcium carbonate collection step of generating calcium carbonate using an aqueous solution obtained in the separation step and an aqueous solution containing potassium carbonate and/or sodium carbonate.
摘要:
Process for producing sodium carbonate and/or sodium bicarbonate from an ore mineral comprising sodium bicarbonate 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 electrodialys er 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.
摘要:
Process to produce sodium carbonate according to which : • a first 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 second production solution comprising sodium carbonate is introduced into the more basic compartments of the electrodialyser; • 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 reacted with sodium bicarbonate in order to form a produced solution comprising sodium carbonate.