Patent ID: 9422166
Filing Date: 2016-08-23
CPC Classification: B01D,C01D

Claim Text:
1. A process to produce sodium carbonate, comprising: introducing a first production solution comprising sodium carbonate into 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 anionic faces of bipolar membranes on one side and by the cationic membranes on the other side; introducing a second production solution comprising sodium carbonate into the more basic compartments of the electrodialyser; producing a solution comprising sodium hydroxide into the more basic compartments, by combination of flux of sodium ions crossing the cationic membrane and flux of hydroxyl ions crossing the anionic face of the bipolar membranes; extracting the solution comprising sodium hydroxide from the more basic compartments of the electrodialyser and using such solution to constitute a reaction solution; and reacting the reaction solution with sodium bicarbonate in order to form a produced solution comprising sodium carbonate.