Carbonation of residual brines produced by ammonia-soda process

Valorization of calcium carbonate-based solid wastes for the treatment of hydrogen sulfide in a semi-continuous reactor

“…During this process, called "mineral carbonation", CO 2 reacts with the alkali divalent cations Ca 2+ and/or Mg 2+ and their oxides (CaO and/or MgO) to produce carbonates particles that are stable at atmospheric conditions [12,13]. These carbonates can be valorized for acid gas neutralization in dry or semi-dry flue gas treatment [14,15].…”

Use of Carbonated Residual Brines as main component of filling grout

“…In this context, the project DECALCO was developed to reduce the impact of the Solvay process for the production of sodium carbonate. The method treats the waste brines using CO 2 recovered from the industrial plant, which leads to the production of lime carbonates called Carbonated Residual Brines (CRB) [2]. This method makes it possible to reduce the environmental impact by transforming waste from the production of Na 2 CO 3 into an inert and recoverable by-product while reducing the CO 2 emissions of the industrial plant.…”