Dolomite-based material having high specific surface area, a method for preparing thereof, a method for controlling a quality thereof, and a method for adsorbing heavy metal, halogen and metalloid
US-2016288085-A1 · Oct 6, 2016 · US
Dolomite-based heavy metal adsorbent, preparation, and use for adsorbing heavy metal, halogen and metalloid
US10058841B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10058841-B2 |
| Application number | US-201615084586-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 30, 2016 |
| Priority date | Mar 31, 2015 |
| Publication date | Aug 28, 2018 |
| Grant date | Aug 28, 2018 |
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Abstract
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A dolomite-based adsorbent for heavy metal, halogen and metalloid is half-fired dolomite, and a content of a residual CaMg(CO3)2 phase in the half-fired dolomite, which is analyzed using a Rietveld method by means of powder X-ray diffraction, is 0.4≤x≤35.4 (wt %), and preferably, the dolomite-based absorbent for heavy metal, halogen and metalloid further comprises ferrous sulfate.
First claim
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What is claimed is: 1. A dolomite-based adsorbent for heavy metal, halogen and metalloid, wherein the dolomite-based absorbent comprises half-fired dolomite and a ferrous compound, and a content of a residual CaMg(CO 3 ) 2 phase in the half-fired dolomite, which is analyzed using a Rietveld method by means of powder X-ray diffraction, is 0.4≤x≤35.4 (wt %). 2. The dolomite-based adsorbent for heavy metal, halogen and metalloid according to claim 1 , wherein the ferrous compound is selected from the group consisting of ferrous chloride and ferrous sulfate. 3. A method for preparing a dolomite-based adsorbent for heavy metal, halogen and metalloid, comprising: firing dolomite so that a content of a residual CaMg(CO 3 ) 2 phase in the obtained dolomite material, which is analyzed using a Rietveld method by means of powder X-ray diffraction, is 0.4≤x≤35.4 (wt %), and blending ferrous compound in the obtained dolomite material. 4. The method for preparing a dolomite-based adsorbent for heavy metal, halogen and metalloid according to claim 3 , wherein the ferrous compound is selected from the group consisting of ferrous chloride and ferrous sulfate. 5. A method for controlling a quality of a dolomite-based adsorbent containing half-fired dolomite and a ferrous compound for heavy metal, halogen and metalloid, comprising: adjusting a residual amount of a residual CaMg(CO 3 ) 2 phase in the obtained dolomite-based material by firing dolomite so that a content of the residual CaMg(CO 3 ) 2 phase in the obtained half-fired dolomite material, which is analyzed using a Rietveld method by means of powder X-ray diffraction, is 0.4≤x≤35.4 (wt %), is obtained. 6. A method for adsorbing heavy metal, halogen and metalloid, comprising: using the dolomite-based adsorbent for heavy metal, halogen and metalloid according to claim 1 . 7. A method for adsorbing heavy metal, halogen and metalloid, comprising: using the dolomite-based adsorbent for heavy metal, halogen and metalloid according to claim 2 .
Assignees
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Classifications
chemically · CPC title
Compounds of S · CPC title
- B01J20/043Primary
Carbonates or bicarbonates, e.g. limestone, dolomite, aragonite · CPC title
using solar energy · CPC title
Heavy metals or heavy metal compounds · CPC title
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- What does patent US10058841B2 cover?
- A dolomite-based adsorbent for heavy metal, halogen and metalloid is half-fired dolomite, and a content of a residual CaMg(CO3)2 phase in the half-fired dolomite, which is analyzed using a Rietveld method by means of powder X-ray diffraction, is 0.4≤x≤35.4 (wt %), and preferably, the dolomite-based absorbent for heavy metal, halogen and metalloid further comprises ferrous sulfate.
- Who is the assignee on this patent?
- Sumitomo Osaka Cement Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification B01J20/043. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Aug 28 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).