US 12,466,733 B2
Process for solubilizing calcium carbonate to obtain a solid compound and an alkaline liquid solution
Lai O. Kuku, Gilbert, AZ (US); Michael P. Woudenberg, Phoenix, AZ (US); Kyle J. Koleber, Phoenix, AZ (US); and Girish N. Raghunathan, Cleveland, OH (US)
Assigned to Global Carbon Emissions Solutions, LLC, Gilbert, AZ (US)
Filed by GLOBAL CARBON EMMISSIONS SOLUTIONS LLC, Gilbert, AZ (US)
Filed on Aug. 3, 2022, as Appl. No. 17/880,589.
Application 17/880,589 is a continuation in part of application No. 17/403,760, filed on Aug. 16, 2021, granted, now 12,012,330.
Claims priority of provisional application 63/351,817, filed on Jun. 14, 2022.
Claims priority of provisional application 63/252,527, filed on Oct. 5, 2021.
Prior Publication US 2023/0051352 A1, Feb. 16, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C01B 25/32 (2006.01); C01D 1/22 (2006.01); C01D 7/02 (2006.01); C01F 11/18 (2006.01); C01F 11/46 (2006.01)
CPC C01B 25/325 (2013.01) [C01D 1/22 (2013.01); C01D 7/02 (2013.01); C01F 11/18 (2013.01); C01F 11/46 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method comprising:
preparing an industrial waste feedstock having calcium oxide and calcium carbonate, the feedstock derived from kiln dust and/or furnace slag;
contacting the feedstock with water, in situ, to form a blended aqueous solution comprising calcium hydroxide;
contacting the blended solution with a solubilizer selected from the group consisting of sodium carbonate and sodium bicarbonate, thereby producing sodium hydroxide and an ionic solid of calcium carbonate; and
recovering one of the calcium carbonate and sodium hydroxide, wherein the recovered calcium carbonate is a cementitious material suitable for use in cement manufacture.