Production of carbonate-containing compositions from material comprising metal silicates

US7749476B2 · kind B2 · utility

Assignee

• Calera Corporation · US

Inventors

• Brent R. Constantz · Cupertino, US
• Laurence Clodic · Sunnyvale, US
• Cecily Ryan · San Jose, US
• Miguel Fernandez · San Jose, US
• Kasra Farsad · San Jose, US
• Sidney Omelon · Willowdale, CA
• Philip Brian Tuet · Milpitas, US
• Paulo J. M. Monteiro · Corona, US
• Gordon E. Brown · Palo Alto, US
• Katharine Geramita · Seattle, US

Key dates

• Filing date: Jul 10, 2009
• Grant date: Jul 6, 2010
• Expiry date: Jul 10, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P40/10
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

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.