Calera Corporation

Sidney Omelon

Brent Richard Constantz

Kasra Farsad

Miguel Fernandez

Katharine Geramita

Karin Yaccato

Cecily Ryan

Philip Brian Tuet

Ryan J Gilliam

Allen J Bard

Andrew Youngs

Valentin Decker

J Douglas Way

Donald W Kirk

Robert S Danziger

Laurence Clodic

Paulo J M Monteiro

Chris L Camire

Irvin Chen

Joshua Patterson

Terence C Holland

John Stagnaro

James R O'Neil

Justin Ries

Ryan Thatcher

Keith Hodson

Paulo Monteiro

Gordon E Brown, Jr

Methods are provided for producing a composition comprising carbonates, wherein the methods comprise utilizing waste sources of metal oxides. An aqueous solution of divalent cations, some or all of which are derived from a waste source of metal oxides, may be contacted with CO2 and subjected to precipitation conditions to provide compositions comprising carbonates. In some embodiments, a combustion ash is the waste source of metal oxides for the aqueous solution containing divalent cations. In some embodiments, a combustion ash is used to provide a source of proton-removing agents, divalent cations, silica, metal oxides, or other desired constituents or a combination thereof.

Methods and systems for utilizing waste sources of metal oxides

Methods of sequestering carbon dioxide (CO) are provided. Aspects of the methods include precipitating a storage stable carbon dioxide sequestering product from an alkaline-earth-metal-containing water and then disposing of the product, e.g., by placing the product in a disposal location or using the product as a component of a manufactured composition. Also provided are systems for practicing methods of the invention.

Methods of sequestering CO2

Provided herein are compositions and methods including hydraulic cement, supplementary cementitious material, and/or self-cementing material. Methods for making the compositions and using the compositions are provided.

Methods and compositions using calcium carbonate

Methods of characterizing and producing compositions with negative &#x3b4;C values are provided. Aspects of the invention include characterizing source materials and process products. Aspects of the invention also include compositions that contain carbon with negative &#x3b4;C values. Methods and techniques are provided for confirming that a given composition contains substances sequestered from a particular source e.g., fossil fuels.

Compositions and methods using substances containing carbon

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Provided are methods for producing carbonate-containing compositions comprising silicon-based material (e.g., pozzolanic material) from a source of carbon dioxide, a divalent cation-containing solution, and a source of proton-removing agents. In such methods, divalent cations of the divalent cation-containing solution are provided by digestion of material comprising metal silicates. Also provided are methods for producing carbonate-containing compositions comprising little or no silicon-based material. In such methods, silicon-based material (e.g., silica, unreacted or undigested silicates, aluminosilicates, etc.) may be separated and processed separately from carbonate-containing compositions. Silicon-based material and carbonate-containing material may be blended at a later stage to produce a pozzolanic material, which may be further processed and blended with, for example, Portland cement.

Production of carbonate-containing compositions from material comprising metal silicates

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Los Gatos, CA, United States of America

Sidney Omelon