DE3901428A1 - Verfahren zur herstellung von calciumsulfat-anhydrit - Google Patents
Verfahren zur herstellung von calciumsulfat-anhydritInfo
- Publication number
- DE3901428A1 DE3901428A1 DE19893901428 DE3901428A DE3901428A1 DE 3901428 A1 DE3901428 A1 DE 3901428A1 DE 19893901428 DE19893901428 DE 19893901428 DE 3901428 A DE3901428 A DE 3901428A DE 3901428 A1 DE3901428 A1 DE 3901428A1
- Authority
- DE
- Germany
- Prior art keywords
- weight
- sulfuric acid
- water
- temperatures
- anhydrite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 title claims abstract description 46
- 229910052925 anhydrite Inorganic materials 0.000 title claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 title abstract description 4
- 239000001175 calcium sulphate Substances 0.000 title abstract 2
- 235000011132 calcium sulphate Nutrition 0.000 title abstract 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 19
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 13
- 239000010440 gypsum Substances 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000003546 flue gas Substances 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 238000010304 firing Methods 0.000 claims abstract description 7
- 238000002425 crystallisation Methods 0.000 claims abstract description 6
- 230000008025 crystallization Effects 0.000 claims abstract description 6
- 239000000843 powder Substances 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 12
- 239000000047 product Substances 0.000 claims description 9
- 238000000137 annealing Methods 0.000 claims description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000006477 desulfuration reaction Methods 0.000 claims description 4
- 230000023556 desulfurization Effects 0.000 claims description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 239000007795 chemical reaction product Substances 0.000 claims description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 2
- 239000000920 calcium hydroxide Substances 0.000 claims description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 2
- 239000000779 smoke Substances 0.000 claims description 2
- 239000012467 final product Substances 0.000 claims 1
- 238000002360 preparation method Methods 0.000 claims 1
- 239000001117 sulphuric acid Substances 0.000 abstract 4
- 235000011149 sulphuric acid Nutrition 0.000 abstract 4
- 230000009257 reactivity Effects 0.000 description 14
- 239000000463 material Substances 0.000 description 10
- 239000003921 oil Substances 0.000 description 4
- 238000005496 tempering Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 150000004683 dihydrates Chemical class 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B11/00—Calcium sulfate cements
- C04B11/02—Methods and apparatus for dehydrating gypsum
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B11/00—Calcium sulfate cements
- C04B11/05—Calcium sulfate cements obtaining anhydrite, e.g. Keene's cement
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19893901428 DE3901428A1 (de) | 1989-01-19 | 1989-01-19 | Verfahren zur herstellung von calciumsulfat-anhydrit |
| PCT/EP1990/000106 WO1990008111A1 (de) | 1989-01-19 | 1990-01-19 | Verfahren zur herstellung von calciumsulfat-anhydrit |
| US07/657,360 US5169444A (en) | 1986-02-20 | 1991-02-19 | Process for preparing calcium sulfate anhydrite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19893901428 DE3901428A1 (de) | 1989-01-19 | 1989-01-19 | Verfahren zur herstellung von calciumsulfat-anhydrit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE3901428A1 true DE3901428A1 (de) | 1990-07-26 |
| DE3901428C2 DE3901428C2 (enrdf_load_stackoverflow) | 1990-10-18 |
Family
ID=6372361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19893901428 Granted DE3901428A1 (de) | 1986-02-20 | 1989-01-19 | Verfahren zur herstellung von calciumsulfat-anhydrit |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE3901428A1 (enrdf_load_stackoverflow) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0492567A3 (en) * | 1990-12-22 | 1992-11-25 | Gebr. Knauf Westdeutsche Gipswerke Kg | Burned anhydrite, procedure for its production and its use |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3605393C1 (en) * | 1986-02-20 | 1987-09-03 | Knauf Westdeutsche Gips | Process for the preparation of anhydrous calcium sulphate (anhydrite) |
-
1989
- 1989-01-19 DE DE19893901428 patent/DE3901428A1/de active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3605393C1 (en) * | 1986-02-20 | 1987-09-03 | Knauf Westdeutsche Gips | Process for the preparation of anhydrous calcium sulphate (anhydrite) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0492567A3 (en) * | 1990-12-22 | 1992-11-25 | Gebr. Knauf Westdeutsche Gipswerke Kg | Burned anhydrite, procedure for its production and its use |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3901428C2 (enrdf_load_stackoverflow) | 1990-10-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OP8 | Request for examination as to paragraph 44 patent law | ||
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee |