A continuous electrodialysis metathesis integrated with in-situ CO2 utilization for controllable NaHCO3/NH4Cl or Na2CO3/NH4Cl production from NaCl and NH3·H2O

New Process for Na2CO3 Production from Na2SO4 Based on Modeling the Na2SO4–(NH4)2SO4–MEA–MEG–H2O System

“…Sodium sulfate is not only the second largest in terms of reserves, but also one of the two most important feedstocks, alongside sodium chloride, for Na 2 CO 3 production. The demand for dense Na 2 CO 3 continues to grow, with a total production of 55 million metric tons in 2018 and a projected 10 million metric tons increase within a decade. − The two most prominent processes − to produce dense Na 2 CO 3 include the Solvay process, which uses sodium chloride (brine solution) as a feed, and the Trona process, which mines crude soda from deposits for later purification. The former process consists of limestone calcination to generate CO 2 , and CO 2 absorption into ammoniated brine to make sodium bicarbonate, which precipitates from the solution, followed by filtration and eventually calcination of the bicarbonate.…”