NL8402502A - Werkwijze voor het omzetten van het residu afkomstig van rookgasontzwavelingsinstallaties in alfahalfhydraat-gipskristallen. - Google Patents
Werkwijze voor het omzetten van het residu afkomstig van rookgasontzwavelingsinstallaties in alfahalfhydraat-gipskristallen. Download PDFInfo
- Publication number
- NL8402502A NL8402502A NL8402502A NL8402502A NL8402502A NL 8402502 A NL8402502 A NL 8402502A NL 8402502 A NL8402502 A NL 8402502A NL 8402502 A NL8402502 A NL 8402502A NL 8402502 A NL8402502 A NL 8402502A
- Authority
- NL
- Netherlands
- Prior art keywords
- sludge
- dihydrate
- hydrate
- reaction vessel
- alpha semi
- Prior art date
Links
- 239000013078 crystal Substances 0.000 title claims description 42
- 238000000034 method Methods 0.000 title claims description 30
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims description 16
- 239000003546 flue gas Substances 0.000 title claims description 16
- 238000006477 desulfuration reaction Methods 0.000 title claims description 15
- 230000023556 desulfurization Effects 0.000 title claims description 15
- 239000011505 plaster Substances 0.000 title description 3
- 239000010802 sludge Substances 0.000 claims description 90
- 238000006243 chemical reaction Methods 0.000 claims description 78
- 229910052602 gypsum Inorganic materials 0.000 claims description 55
- 239000010440 gypsum Substances 0.000 claims description 55
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 43
- 150000004683 dihydrates Chemical class 0.000 claims description 42
- 239000000047 product Substances 0.000 claims description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 16
- 239000002253 acid Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 239000012065 filter cake Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 238000009835 boiling Methods 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- 239000010881 fly ash Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 238000002425 crystallisation Methods 0.000 description 4
- 230000008025 crystallization Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005755 formation reaction Methods 0.000 description 3
- 244000052616 bacterial pathogen Species 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 description 1
- 235000010261 calcium sulphite Nutrition 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 239000012297 crystallization seed Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000007704 transition Effects 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
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)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19833331839 DE3331839C1 (de) | 1983-09-03 | 1983-09-03 | Verfahren zur Herstellung von Alphahalbhydrat-Gipskristallen aus Dihydrat-Gips enthaltenden Rückständen |
| DE19833331838 DE3331838A1 (de) | 1983-09-03 | 1983-09-03 | Verfahren zur umsetzung des rueckstandes aus rauchgas-entschwefelungsanlagen zu alphahalbhydrat-gipskristallen |
| DE3331838 | 1983-09-03 | ||
| DE3331839 | 1983-09-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL8402502A true NL8402502A (nl) | 1985-04-01 |
Family
ID=25813699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL8402502A NL8402502A (nl) | 1983-09-03 | 1984-08-14 | Werkwijze voor het omzetten van het residu afkomstig van rookgasontzwavelingsinstallaties in alfahalfhydraat-gipskristallen. |
Country Status (4)
| Country | Link |
|---|---|
| DK (1) | DK417684A (fr) |
| FR (1) | FR2551432A1 (fr) |
| IT (1) | IT1175858B (fr) |
| NL (1) | NL8402502A (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4956685A (en) * | 1984-12-21 | 1990-09-11 | Licentia Patent-Verwaltungs Gmbh | Thin film solar cell having a concave n-i-p structure |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1356700A (fr) * | 1963-05-10 | 1964-03-27 | Giulini Gmbh Soc Geb | Procédé pour la fabrication de plâtres semi-hydratés de haute qualite |
| GB1101771A (en) * | 1963-08-14 | 1968-01-31 | Bpb Industries Ltd | Improvements relating to the production of gypsum plaster |
| IL23004A (en) * | 1964-02-27 | 1969-03-27 | Fosindus Co | Process for the purification of residual gypsum produced in the manufacture of phosphoric acid by the reaction of sulphuric acid with natural phosphates |
| FR91350E (fr) * | 1966-08-01 | 1968-05-24 | Quartz & Silice | Procédé et dispositif pour la purification poussée d'eau et autres liquides |
| DE1592080A1 (de) * | 1966-10-27 | 1970-09-10 | Central Glass Co Ltd | Herstellungsverfahren fuer Gips von hoher Reinheit |
| GB1547422A (en) * | 1975-03-31 | 1979-06-20 | Japan Government | Manufacture of gypsum |
| DE2803764C2 (de) * | 1978-01-28 | 1983-02-10 | Saarbergwerke AG, 6600 Saarbrücken | Verfahren zur Reinigung von Kohlefeuerungsabgasen |
-
1984
- 1984-08-14 NL NL8402502A patent/NL8402502A/nl not_active Application Discontinuation
- 1984-08-29 FR FR8413346A patent/FR2551432A1/fr not_active Withdrawn
- 1984-08-30 IT IT22468/84A patent/IT1175858B/it active
- 1984-08-31 DK DK417684A patent/DK417684A/da unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR2551432A1 (fr) | 1985-03-08 |
| DK417684A (da) | 1985-03-04 |
| DK417684D0 (da) | 1984-08-31 |
| IT8422468A0 (it) | 1984-08-30 |
| IT1175858B (it) | 1987-07-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A1A | A request for search or an international-type search has been filed | ||
| BB | A search report has been drawn up | ||
| BC | A request for examination has been filed | ||
| BV | The patent application has lapsed |