Abstract: The proposed invention uses industrial byproducts such as fly ash in an ion exchange/reverse osmosis (IE/RO) patented technology to sequester carbon dioxide CO2 gas and produce 6 to 7% sodium carbonate (Na2CO3) liquor. Similar materials encompass alkaline Fly Ash (AFA) liquor, alkaline red mud (ARM), coal ash, wood ash, and similar natural byproduct materials that are rich in metallic oxides. The process uses AFA or ARM at the input of an IE/RO process where the hydroxides (OH?) get extracted and concentrated for CO2 gas sequestration. The remaining insoluble byproduct material is used in civil works such as construction and road industry. Ion exchange modules are used to remove all multivalent ionic impurities while a reverse osmosis (RO) skid concentrates the carbonated liquor up to 6 to 7% liquor (or 10% in advanced RO). The process is not an electrochemical chloro-alkali battery nor related to the ammonical Solvay process.

Abstract: The proposed invention uses ion exchange technology to produce dilute caustic soda liquor from calcium hydroxide liquor Ca(OH)2 followed by the reaction of carbon dioxide CO2 with caustic soda to produce dilute sodium carbonate solution. Multiple reverse osmosis and acidic CO2 sparging can concentrate the Na2CO3 liquor to 6-7%. The 6-7% liquor is treated with waste heat to produce 50% or solid Na2CO3. The 6-7% liquor can be treated with Ca(OH)2 to produce 6-7% NaOH liquor then can be transformed to 50% or solid NaOH. The output of many industrial processes generates waste heat, brine water and CO2 and the present invention combines these components in the production of solid Na2CO3, NaOH or their high % liquors. Availability of waste heat sources can lead to higher efficiency in Na2CO3 and NaOH production. The process is not electrochemical chloro alkali technology or Solvay process.