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US 11,697,598 B2Granted
Methods and systems for treatment of limestone to form vaterite
AssigneeArelac, Inc.
InventorsMichael Joseph Weiss, Ryan J Gilliam
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Abstract
Provided herein are methods and systems to form calcium carbonate comprising vaterite, comprising dissolving limestone in an aqueous base solution under one or more precipitation conditions to produce a precipitation material comprising calcium carbonate and a supernatant solution, wherein the calcium carbonate comprises vaterite.
Claims23
A method comprising:
- (i) dissolving limestone in N-containing salt solution to produce first aqueous solution comprising calcium salt, and gaseous stream comprising carbon dioxide;
- (ii) treating the first aqueous solution comprising calcium salt with the gaseous stream comprising carbon dioxide to form precipitation material comprising calcium carbonate, wherein the calcium carbonate comprises reactive vaterite;
- and
- (iii) adding water to the reactive vaterite and transforming the reactive vaterite to aragonite wherein the aragonite sets and hardens to form cement, cementitious product, non-cementitious product, or combination thereof.
1 more element
Dependencies are inferred from the claim text.