Combined solid waste, carbon dioxide quicklime sparging, brine water, and reverse osmosis/ion exchange processes for the production of soda chemicals

A solid waste-quicklime membrane (SWQM) process for production of sodium carbonate (NaHCO3), comprising:

• providing a reactor with a quicklime (Ca(OH)2) water;
• sparging carbon dioxide (CO2) through the quicklime (Ca(OH)2) water in the reactor to generate calcium hydrogen carbonate (Ca(HCO3)2) liquor;
• concentrating the generated calcium hydrogen carbonate (Ca(HCO3)2) liquor in a reverse osmosis system;
• producing a sodium hydrogen carbonate (NaHCO3) by combining the concentrated calcium hydrogen carbonate (Ca(HCO3)2) liquor and a brine solution in a mixer.

A solid waste-quicklime membrane (SWQM) process for production of sodium carbonate (NaHCO3), comprising:

• providing a reactor with a quicklime (Ca(OH)2) water;
• sparging carbon dioxide (CO2) produced as a by-product of a solid waste facility through the quicklime (Ca(OH)2) water in the reactor to generate calcium hydrogen carbonate (Ca(HCO3)2) liquor;
• concentrating the generated calcium hydrogen carbonate (Ca(HCO3)2) liquor in a reverse osmosis system to about 6-10%;
• producing a sodium hydrogen carbonate (NaHCO3) by combining the concentrated calcium hydrogen carbonate (Ca(HCO3)2) liquor and a brine solution that has at least 8% NaCl in a mixer, concentrating the sodium hydrogen carbonate (NaHCO3) to at least 6% by heating the produced sodium hydrogen carbonate (NaHCO3) to remove excess water, wherein the process obtains sodium hydrogen carbonate (NaHCO3) without using ammonia.

A solid waste-quicklime membrane (SWQM) process for production of sodium carbonate (NaHCO3), comprising:

• providing a reactor with a quicklime (Ca(OH)2) water;
• sparging carbon dioxide (CO2) through the quicklime (Ca(OH)2) water in the reactor to generate calcium hydrogen carbonate (Ca(HCO3)2) liquor;
• producing a sodium hydrogen carbonate (NaHCO3) by combining the calcium hydrogen carbonate (Ca(HCO3)2) liquor and a brine solution in an ion exchange reactor;
• and
• concentrating the generated sodium hydrogen carbonate (NaHCO3) liquor in a reverse osmosis system.

A process for utilizing carbon dioxide (CO2) and heat as by-products generated by a solid waste facility, comprising,

• providing a reactor with a quicklime (Ca(OH)2) water;
• sparging carbon dioxide (CO2) generated by the solid waste facility through the quicklime (Ca(OH)2) water in the reactor to generate low concentrated calcium hydrogen carbonate (Ca(HCO3)2) liquor;
• concentrating the low concentrated calcium hydrogen carbonate (Ca(HCO3)2) liquor in a reverse-osmosis filtration system;
• combining the concentrated calcium hydrogen carbonate (Ca(HCO3)2) liquor with a brine (NaCl) solution in an ion exchange reactor to precipitate sodium hydrogen carbonate (NaHCO3), and
• concentrating the sodium hydrogen carbonate (NaHCO3) using heat from the solid waste facility to generate dry sodium hydrogen carbonate (NaHCO3) or soda ash (Na2CO3).