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US 12,466,733 B2Granted
Process for solubilizing calcium carbonate to obtain a solid compound and an alkaline liquid solution
AssigneeGlobal Carbon Emissions Solutions, LLC
InventorsLai O. Kuku, Michael P. Woudenberg, Kyle J. Koleber, Girish N. Raghunathan
Life of this patent
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Abstract
The subject process relates generally to producing an aqueous solution through a simple but highly effective chemical reaction. The aqueous solution is composed of a blended solution with water and an added solubilizer for the chemical reaction. The results produce an ionic solid and an alkaline liquid solution which are useful commercial products, and various applications including but not limited to use as a CO2 capture solvent.
Claims13
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.
2 more elements
A method comprising:
- preparing a blended aqueous solution from an industrial waste feedstock having calcium carbonate and calcium hydroxide, the feedstock derived from kiln dust and furnace slag:
- contacting the blended solution of calcium carbonate or calcium hydroxide with a solubilizer of sodium sulfate, thereby forming an ionic solid of calcium sulfate and an alkaline liquid of sodium hydroxide or sodium carbonate;
- and
- recovering one of the ionic solids of calcium sulfate or the alkaline liquid of sodium hydroxide and sodium carbonate, wherein the recovered calcium sulfate is a cementitious material suitable for use in cement manufacture and the recovery of sodium hydroxide and sodium carbonate can be reused or sold commercially.
1 more element
Dependencies are inferred from the claim text.