NO117067B - - Google Patents
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- Publication number
- NO117067B NO117067B NO162716A NO16271666A NO117067B NO 117067 B NO117067 B NO 117067B NO 162716 A NO162716 A NO 162716A NO 16271666 A NO16271666 A NO 16271666A NO 117067 B NO117067 B NO 117067B
- Authority
- NO
- Norway
- Prior art keywords
- hemihydrate
- calcium sulfate
- recrystallization
- water
- dihydrate
- Prior art date
Links
- 238000000034 method Methods 0.000 claims description 17
- 238000001953 recrystallisation Methods 0.000 claims description 17
- 239000013078 crystal Substances 0.000 claims description 16
- 229910052602 gypsum Inorganic materials 0.000 claims description 16
- 239000010440 gypsum Substances 0.000 claims description 16
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 8
- 239000002699 waste material Substances 0.000 claims description 7
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 150000004683 dihydrates Chemical class 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 3
- FODHIQQNHOPUKH-UHFFFAOYSA-N tetrapropylene-benzenesulfonic acid Chemical compound CC1CC11C2=C3S(=O)(=O)OC(C)CC3=C3C(C)CC3=C2C1C FODHIQQNHOPUKH-UHFFFAOYSA-N 0.000 claims description 3
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 2
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims 3
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims 1
- 239000002994 raw material Substances 0.000 claims 1
- 239000011975 tartaric acid Substances 0.000 claims 1
- 235000002906 tartaric acid Nutrition 0.000 claims 1
- 239000002002 slurry Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 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
- C04B11/024—Ingredients added before, or during, the calcining process, e.g. calcination modifiers
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
- C01F11/466—Conversion of one form of calcium sulfate to another
-
- 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)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Peptides Or Proteins (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Saccharide Compounds (AREA)
- Seasonings (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEG43435A DE1238374B (de) | 1965-04-24 | 1965-04-24 | Verfahren zur Herstellung von alpha-Calciumsulfat-Halbhydrat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO117067B true NO117067B (fr) | 1969-06-23 |
Family
ID=7127185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO162716A NO117067B (fr) | 1965-04-24 | 1966-04-23 |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US3410655A (fr) |
| AT (1) | AT271303B (fr) |
| BE (1) | BE679909A (fr) |
| CH (1) | CH489441A (fr) |
| DE (1) | DE1238374B (fr) |
| DK (1) | DK134008C (fr) |
| ES (1) | ES324794A1 (fr) |
| FR (1) | FR1473955A (fr) |
| GB (1) | GB1092233A (fr) |
| IL (1) | IL25128A (fr) |
| NL (1) | NL6511678A (fr) |
| NO (1) | NO117067B (fr) |
Families Citing this family (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3961105A (en) * | 1972-03-27 | 1976-06-01 | Certain-Teed Products Corporation | Method for the manufacture of coated calcium sulfate whisker fibers |
| US3977890A (en) * | 1972-08-16 | 1976-08-31 | Johns-Manville Corporation | Method for the preparation of fibrous calcium sulfate hemihydrate |
| GB1451608A (en) * | 1972-11-08 | 1976-10-06 | Fisons Ltd | Process for reducing calcium sulphate scale formation |
| JPS5140399A (en) * | 1974-10-03 | 1976-04-05 | Taki Chemical | Aryusankarushiumuno shorihoho |
| GB1547424A (en) * | 1975-03-31 | 1979-06-20 | Japan Government | Method of producing needlelike 11-anhydrite gypsum |
| DE2603699C2 (de) * | 1976-01-31 | 1977-12-08 | Ruhrkohle AG; Steag AG; 4300 Essen | Verfahren zur Beseitigung des Rückstandes der Abgaswäsche von Feuerungen, insbesondere von Steinkohlenkraftwerken |
| DE2844266C2 (de) * | 1978-10-11 | 1984-10-31 | Giulini Chemie Gmbh, 6700 Ludwigshafen | Hartgips, Verfahren zu seiner Herstellung und seine Verwendung |
| DE3139384A1 (de) * | 1981-10-03 | 1983-04-21 | Salzgitter Maschinen Und Anlagen Ag, 3320 Salzgitter | Verfahren und vorrichtung zur drucklosen herstellung von (alpha)-calciumsulfat-halbhydrat |
| US5248487A (en) * | 1987-03-21 | 1993-09-28 | Jorg Bold | Process for the conversion of calcium sulfate dihydrate into alpha-hemihydrate |
| GB2205089B (en) * | 1987-05-22 | 1991-03-13 | Rhein Westfael Elect Werk Ag | Process for production of calcium sulphate alpha-hemihydrate |
| DE4034497C1 (fr) * | 1990-10-30 | 1992-02-13 | Metallgesellschaft Ag, 6000 Frankfurt, De | |
| DE4217978A1 (de) * | 1992-05-30 | 1993-12-02 | Heidelberger Zement Ag | Verfahren zur Herstellung von ALPHA-Halbhydrat aus Calciumsulfat-Dihydrat in einem Reaktor |
| DE4409219C2 (de) * | 1994-03-18 | 1997-03-27 | Salzgitter Anlagenbau | Verfahren zur kontinuierlichen Herstellung von alpha-Calciumsulfat-Halbhydrat aus Calciumsulfat-Dihydrat |
| GB9718886D0 (en) * | 1997-09-06 | 1997-11-12 | Caso Limited | Plaster of paris reclamation |
| EP1259196A2 (fr) * | 2000-03-03 | 2002-11-27 | Smith & Nephew, Inc. | Particule fa onnee et composition pour carence osseuse, et procede de fabrication de ladite particule |
| US7588634B2 (en) * | 2006-09-20 | 2009-09-15 | United States Gypsum Company | Process for manufacturing ultra low consistency alpha- and beta- blend stucco |
| US7754006B2 (en) * | 2007-03-20 | 2010-07-13 | United States Gypsum Company | Process for manufacturing ready-mixed setting alpha-calcium sulphate hemi-hydrate and kit for same |
| CA2731836C (fr) * | 2008-07-31 | 2014-09-23 | Yoshino Gypsum Co., Ltd. | Procede permettant la modification en continu du gypse dihydrate et gypse dihydrate modifie obtenu a partir de ce procede |
| US8182698B2 (en) | 2010-06-30 | 2012-05-22 | Arr-Maz Custom Chemicals, Inc. | Method for improving gypsum/phosphoric acid slurry filtration using carboxymethyl cellulose |
| US20140067082A1 (en) | 2012-09-06 | 2014-03-06 | Xinyin Liu | Bioresorbable ceramic composition for forming a three dimensional scaffold |
| CN105948547B (zh) * | 2016-07-12 | 2017-10-31 | 山东博瑞新材料科技有限公司 | 一种利用二水硫酸钙制备α型半水硫酸钙的方法 |
| CN109280959A (zh) * | 2017-07-19 | 2019-01-29 | 北新集团建材股份有限公司 | 一种由脱硫石膏制备半水石膏纤维的方法 |
| CN109280979B (zh) * | 2017-07-19 | 2021-09-07 | 北新集团建材股份有限公司 | 一种制备半水石膏晶须的方法 |
| CN110422868B (zh) * | 2019-05-17 | 2022-01-04 | 湖北民族大学 | 转晶剂、医用片状α-半水硫酸钙及其制备方法 |
| MX2024008866A (es) | 2022-02-08 | 2024-07-25 | Knauf Gips Kg | Panel de yeso que contiene vermiculita intercambiada con amonio y metodos. |
| WO2023229996A1 (fr) | 2022-05-27 | 2023-11-30 | United States Gypsum Company | Formule de plâtre à modeler à porosité accrue |
| WO2024030372A1 (fr) | 2022-08-05 | 2024-02-08 | United States Gypsum Company | Inhibiteur de durcissement prématuré de la chaux à base de phosphate efficace et à faible coût |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1943497A (en) * | 1932-03-19 | 1934-01-16 | Bichowsky Foord Von | Method for producing finely divided hydrated calcium sulphate |
| US2913308A (en) * | 1953-07-07 | 1959-11-17 | United States Gypsum Co | Process for the production of high strength low consistency calcined gypsum |
| US2907668A (en) * | 1956-03-30 | 1959-10-06 | United States Gypsum Co | Calcination of gypsum |
| US3081152A (en) * | 1959-10-05 | 1963-03-12 | United States Gypsum Co | Process for calcination of gypsum |
| DE1157128B (de) * | 1962-05-25 | 1963-11-07 | Giulini Ges Mit Beschraenkter | Verfahren zur Herstellung von ª‡-Calciumsulfat-Halbhydrat aus synthetischem Calciumsulfat-Dihydrat |
| US3199997A (en) * | 1962-11-13 | 1965-08-10 | United States Gypsum Co | Process for producing calcined products from by-product gypsum |
| GB999487A (en) * | 1963-05-03 | 1965-07-28 | Ici Ltd | Set-retarded calcium sulphate hemihydrate |
-
1965
- 1965-04-24 DE DEG43435A patent/DE1238374B/de active Pending
- 1965-07-30 CH CH1076265A patent/CH489441A/de not_active IP Right Cessation
- 1965-09-08 NL NL6511678A patent/NL6511678A/xx unknown
- 1965-12-21 FR FR21243A patent/FR1473955A/fr not_active Expired
-
1966
- 1966-02-01 GB GB4439/66A patent/GB1092233A/en not_active Expired
- 1966-02-07 IL IL25128A patent/IL25128A/xx unknown
- 1966-02-24 US US529632A patent/US3410655A/en not_active Expired - Lifetime
- 1966-03-28 ES ES0324794A patent/ES324794A1/es not_active Expired
- 1966-04-14 DK DK191066A patent/DK134008C/da active
- 1966-04-22 BE BE679909D patent/BE679909A/xx not_active IP Right Cessation
- 1966-04-22 AT AT379966A patent/AT271303B/de active
- 1966-04-23 NO NO162716A patent/NO117067B/no unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE1238374B (de) | 1967-04-06 |
| BE679909A (fr) | 1966-10-03 |
| CH489441A (de) | 1970-04-30 |
| IL25128A (en) | 1969-07-30 |
| GB1092233A (en) | 1967-11-22 |
| US3410655A (en) | 1968-11-12 |
| NL6511678A (fr) | 1966-10-25 |
| DK134008B (da) | 1976-08-30 |
| AT271303B (de) | 1969-05-27 |
| DK134008C (da) | 1977-01-31 |
| FR1473955A (fr) | 1967-03-24 |
| ES324794A1 (es) | 1967-02-01 |
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