PRODUCTION OF CARBONATE-CONTAINING COMPOSITIONS FROM MATERIAL COMPRISING METAL SILICATES

• Main Authors: OMELON SIDNEY, CLODIC LAURENCE, FARSAD KASRA, FERNANDEZ MIGUEL, MONTEIRO PAULO, BROWN JR. GORDON E, GERAMITA KATHARINE, TUET PHIL, CONSTANTZ BRENT R, RYAN CECILY
• Format: Patent
• Language: English; Korean
• Published: 09.06.2011
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; COMPOUNDS THEREOF; CONCRETE; INORGANIC CHEMISTRY; LIME, MAGNESIA; METALLURGY; NON-METALLIC ELEMENTS; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

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.