IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0486692
(2009-06-17)
|
등록번호 |
US-7754169
(2010-08-02)
|
발명자
/ 주소 |
- Constantz, Brent
- Monteiro, Paulo J. M.
- Omelon, Sidney
- Fernandez, Miguel
- Farsad, Kasra
- Geramita, Katharine
- Yaccato, Karin
|
출원인 / 주소 |
|
인용정보 |
피인용 횟수 :
65 인용 특허 :
110 |
초록
▼
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 prec
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.
대표청구항
▼
What is claimed is: 1. A method comprising: a) contacting an aqueous solution with a source of metal oxides from a first industrial process; b) charging the aqueous solution with carbon dioxide from a source of carbon dioxide from the same or a second industrial process, wherein the source of carbo
What is claimed is: 1. A method comprising: a) contacting an aqueous solution with a source of metal oxides from a first industrial process; b) charging the aqueous solution with carbon dioxide from a source of carbon dioxide from the same or a second industrial process, wherein the source of carbon dioxide further comprises SOx, NOx, mercury, or any combination thereof; and c) subjecting the aqueous solution to precipitation conditions under atmospheric pressure to produce at least one carbonate-containing precipitation material, wherein the precipitation material comprises calcium carbonate, optionally in combination with magnesium carbonate, wherein the calcium carbonate comprises a precipitation material selected from the group consisting of aragonite, vaterite, and mixtures thereof. 2. The method of claim 1, wherein the source of metal oxides and the source of carbon dioxide are from the same industrial process. 3. The method of claim 1, wherein contacting the aqueous solution with the source of metal oxides occurs prior to charging the aqueous solution with the source of carbon dioxide. 4. The method of claim 3, wherein the source of carbon dioxide is flue gas from a coal-fired power plant or kiln exhaust from a cement plant. 5. The method of claim 4, wherein the source of metal oxides is fly ash from a coal-fired power plant or cement kiln dust from a cement plant. 6. The method of claim 3, wherein the source of metal oxides provides divalent cations for producing the precipitation material, and wherein the divalent cations comprise Ca+, optionally in combination with Mg2+. 7. The method of claim 3, wherein the source of metal oxides provides proton-removing agents for producing the precipitation material upon hydration of CaO, optionally in combination with MgO, in the aqueous solution. 8. The method of claim 7, wherein the source of metal oxides further provides silica, alumina, ferric oxide, or a combination thereof. 9. The method of claim 7, wherein electrochemical methods effecting proton removal also provide for producing precipitation material. 10. The method of claim 3, further comprising processing the precipitation material to form a building material selected from the group consisting of hydraulic cement, pozzolanic cement, and an aggregate. 11. The method of claim 1, wherein the precipitation material further comprises calcite.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.