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US 9,139,472 B2Granted
Methods and compositions using calcium carbonate and stabilizer
AssigneeCalera Corporation
InventorsMiguel Fernandez, Irvin Chen, Patricia Tung Lee, Matthew Ginder-Vogel
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Abstract
Provided herein are compositions, methods, and systems for a material containing metastable carbonate and stabilizer. Methods for making the compositions and using the compositions are also provided.
Claims15
A method for making a composition, comprising:
- contacting CO2 from a CO2 source with a solution comprising proton removing agent, alkaline earth-metal ions and a stabilizer under one or more conditions to make a composition comprising at least 50% w/w activated vaterite and the stabilizer wherein the stabilizer is sulfate and wherein the stabilizer in the solution is between 0.1-1 wt %, and
- combining the composition with water and facilitating vaterite transformation to aragonite when the composition sets and hardens to form cement.
Dependencies are inferred from the claim text.