METHODS AND SYSTEMS FOR UTILIZING WASTE SOURCES OF METAL OXIDES

• US 20100239467A1
• Filed: 05/27/2010
• Published: 09/23/2010
• Est. Priority Date: 06/17/2008
• Status: Abandoned Application

• Current Assignee: Calera Corporation
• Original Assignee: Calera Corporation
• Inventors: MONTEIRO, Paulo J.M., CONSTANTZ, Brent, OMELON, Sidney, FERNANDEZ, Miguel, YACCATO, Karin, GERAMITA, Katharine, FARSAD, Kasra
• Application Number:
  US12/788,735
• Publication Number:
  US 20100239467A1
• Time in Patent Office: Days
• US Class Current: 422/168
• CPC Class Codes: B01D 2257/504 Carbon dioxide
• CPC Class Codes: C01F 11/181 Preparation of calcium carbonate by carbonation of aqueous solutions and characterised by control of the carbonation conditions
• CPC Class Codes: C01F 5/24 Magnesium carbonates
• CPC Class Codes: C01P 2002/72 by d-values or two theta-values, e.g. as X-ray diagram
• CPC Class Codes: C01P 2002/82 by IR- or Raman-data
• CPC Class Codes: C01P 2002/88 by thermal analysis data, e.g. TGA, DTA, DSC
• CPC Class Codes: C01P 2004/03 obtained by SEM
• CPC Class Codes: C01P 2004/61 Micrometer sized, i.e. from 1-100 micrometer
• CPC Class Codes: C01P 2006/12 Surface area
• CPC Class Codes: C04B 14/28 of calcium
• CPC Class Codes: C04B 2290/20 Integrated combined plants or devices, e.g. combined foundry and concrete plant
• CPC Class Codes: C04B 7/436 Special arrangements for treating part or all of the cement kiln dust
• CPC Class Codes: Y02P 40/121 Energy efficiency measures, e.g. improving or optimising the production methods
• CPC Class Codes: Y02P 40/18 Carbon capture and storage [CCS]

Abstract

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.

Claims

1. A system comprising:

a) a slaker adapted to slake a waste source of metal oxides

b) a precipitation reactor; and

c) a liquid-solid separator, wherein the precipitation reactor is operably connected to both the slaker and the liquid-solid separator, and further wherein the system is configured to produce carbonate-containing precipitation material in excess of 1 ton per day.

2. The system of claim 1, wherein the system is configured to produce carbonate-containing precipitation material in excess of 10 tons per day.

3. The system of claim 1, wherein the system is configured to produce carbonate-containing precipitation material in excess of 100 ton per day.

4. The system of claim 1, wherein the system is configured to produce carbonate-containing precipitation material in excess of 1000 tons per day.

5. The system of claim 1, wherein the system is configured to produce carbonate-containing precipitation material in excess of 10,000 tons per day.

6. The system of claim 1, wherein the slaker is selected from a slurry detention slaker, a paste slaker, and a ball mill slaker.

7. The system of claim 1, further comprising a source of carbon dioxide.

8. The system of claim 7, wherein the source of carbon dioxide is from a coal-fired power plant or cement plant.

9. The system of claim 1, further comprising a source of proton-removing agents.

10. The system of claim 1, further comprising a source of divalent cations.

11. The system of claim 1, further comprising a building-materials production unit configured to produce a building material from solid product of the liquid-solid separator.