DK200188A - PROCEDURE FOR PREPARING AN ADSORBENT OF A BLASTED MINERAL AND CALCIUM SULPHATE HALF HYDRATE - Google Patents
PROCEDURE FOR PREPARING AN ADSORBENT OF A BLASTED MINERAL AND CALCIUM SULPHATE HALF HYDRATEInfo
- Publication number
- DK200188A DK200188A DK200188A DK200188A DK200188A DK 200188 A DK200188 A DK 200188A DK 200188 A DK200188 A DK 200188A DK 200188 A DK200188 A DK 200188A DK 200188 A DK200188 A DK 200188A
- Authority
- DK
- Denmark
- Prior art keywords
- calcium sulphate
- adsorbent
- expanded mineral
- mineral
- hemihydrate
- Prior art date
Links
Landscapes
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention relates to a method of producing an adsorbent, in which a granular expanded mineral and calcium sulphate hemihydrate are mixed together to form a granulated material, and the calcium sulphate hemihydrate is converted into calcium sulphate dihydrate by the addition of a surplus of water, and where the free water is removed by drying. It is desirable that the proportion of expanded mineral be reduced, the adsorption effect be approximately maintained, and the hardness of the adsorbent be increased without any additives. This is accomplished by mixing calcium sulphate hemihydrate and expanded mineral in such quantities that a weight ratio of calcium sulphate : expanded mineral greater than 5:1 and up to 10:1 exists in the adsorbent by mixing being effected by calcium sulphate hemihydrate and expanded mineral being poured together into a container and mixed together by means of a stirring tool to form a granulated mixture, by the granulated mixture, after addition of water and before drying, being left for at least 4 minutes, and by the dry calcium sulphate dihydrate being converted, by calcining at 120-150 degree C, into calcium sulphate hemihydrate in such a proportion that the adsorbent has a total water content of 1% by weight to 16% by weight. The adsorbent produced in this manner comprises, on the one hand, open-pore smaller particles which consist only of calcium sulphate and, on the other hand, open-pore larger particles in which an expanded mineral core is coated with calcium sulphate.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3713742 | 1987-04-24 | ||
| DE19873713742 DE3713742A1 (en) | 1987-04-24 | 1987-04-24 | METHOD FOR PRODUCING AN ADSORPTION AGENT FROM PERLITE AND CALCIUM SULFATE SEMI-HYDRATE |
| EP88103351 | 1988-03-04 | ||
| EP88103351A EP0303760B1 (en) | 1987-04-24 | 1988-03-04 | Process for making an adsorbent agent from expanded rocks and calcium sulfate-hemihydrate |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK200188D0 DK200188D0 (en) | 1988-04-12 |
| DK200188A true DK200188A (en) | 1988-10-25 |
| DK171051B1 DK171051B1 (en) | 1996-05-06 |
Family
ID=25854931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK200188A DK171051B1 (en) | 1987-04-24 | 1988-04-12 | Method of producing an adsorbent made of an expanded mineral and calcium sulphate hemihydrate, and use thereof |
Country Status (3)
| Country | Link |
|---|---|
| AT (1) | ATE76782T1 (en) |
| CA (1) | CA1312063C (en) |
| DK (1) | DK171051B1 (en) |
-
1988
- 1988-03-04 AT AT88103351T patent/ATE76782T1/en not_active IP Right Cessation
- 1988-04-12 DK DK200188A patent/DK171051B1/en not_active IP Right Cessation
- 1988-04-21 CA CA 564667 patent/CA1312063C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DK171051B1 (en) | 1996-05-06 |
| DK200188D0 (en) | 1988-04-12 |
| CA1312063C (en) | 1992-12-29 |
| ATE76782T1 (en) | 1992-06-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| B1 | Patent granted (law 1993) | ||
| PBP | Patent lapsed |