Patent ID: 11857920
Assignee: nan
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  Y | IPC B  C

Claim 0:
1. A method of chemically sequestering carbon dioxide (CO2) by a loop sequence, comprising:
a) providing a mixture of CO2, lithium hydroxide (LiOH), either of sodium hydroxide (NaOH) or potassium hydroxide (KOH), and water (H2O) in one or more reaction chambers;
b) reacting CO2 with LiOH to generate lithium carbonate (Li2CO3) and H2O in the mixture;
c) reacting Li2CO3 with NaOH or KOH to generate LiOH, and either of sodium carbonate (Na2CO3) or potassium carbonate (K2CO3) in the mixture;
d) reacting Na2CO3 or K2CO3 with CO2 and H2O to generate either of sodium bicarbonate (NaHCO3) or potassium bicarbonate (KHCO3) in the mixture;
e) adding an alcohol solvent to the mixture, forcing the generated NaHCO3 or KHCO3 to precipitate, and removing the precipitated NaHCO3 or KHCO3 from the mixture;
f) removing the alcohol solvent from the mixture;
g) optionally adding NaOH or KOH, and/or H2O to the mixture; and
h) adding CO2 to the mixture in the one or more reaction chambers and reacting the mixture according to step b to complete the loop sequence.