FR2438634A1 - Procede de fabrication d'hemihydrate de sulfate de calcium alpha - Google Patents
Procede de fabrication d'hemihydrate de sulfate de calcium alphaInfo
- Publication number
- FR2438634A1 FR2438634A1 FR7921111A FR7921111A FR2438634A1 FR 2438634 A1 FR2438634 A1 FR 2438634A1 FR 7921111 A FR7921111 A FR 7921111A FR 7921111 A FR7921111 A FR 7921111A FR 2438634 A1 FR2438634 A1 FR 2438634A1
- Authority
- FR
- France
- Prior art keywords
- sulphate hemihydrate
- manufacture
- calcium
- calcium sulphate
- alpha calcium
- 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
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- 238000000034 method Methods 0.000 title abstract 2
- 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 title 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 abstract 3
- 229910052791 calcium Inorganic materials 0.000 abstract 3
- 239000011575 calcium Substances 0.000 abstract 3
- 229910021653 sulphate ion Inorganic materials 0.000 abstract 3
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 abstract 1
- 150000004683 dihydrates Chemical class 0.000 abstract 1
- 239000011505 plaster Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 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)
- Materials For Medical Uses (AREA)
Abstract
PROCEDE DE FABRICATION D'HEMIHYDRATE DE SULFATE DE CALCIUM ALPHA A PRISE RAPIDE A PARTIR DE DIHYDRATE DE SULFATE DE CALCIUM PAR RECRISTALLISATION HYDROTHERMIQUE, EN PRESENCE DE SUBSTANCES INFLUENCANT LA STRUCTURE CRISTALLINE, A UN PH INFERIEUR OU EGAL A 3. ON TRANSFORME 99, AU MAXIMUM, DU DIHYDRATE EN HEMIHYDRATE DE SULFATE DE CALCIUM ALPHA ET LE DIHYDRATE RESTANT EST CALCINE EN HEMIHYDRATE DE SULFATE DE CALCIUM BETA JUSQU'A UN RESTE DE 0,5. UTILISATION: BANDAGES PLATRES, PLATRES MEDICAUX.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2844266A DE2844266C2 (de) | 1978-10-11 | 1978-10-11 | Hartgips, Verfahren zu seiner Herstellung und seine Verwendung |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2438634A1 true FR2438634A1 (fr) | 1980-05-09 |
FR2438634B1 FR2438634B1 (fr) | 1984-10-05 |
Family
ID=6051919
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7921111A Granted FR2438634A1 (fr) | 1978-10-11 | 1979-08-13 | Procede de fabrication d'hemihydrate de sulfate de calcium alpha |
Country Status (5)
Country | Link |
---|---|
US (1) | US4234345A (fr) |
CA (1) | CA1112844A (fr) |
DE (1) | DE2844266C2 (fr) |
FR (1) | FR2438634A1 (fr) |
GB (1) | GB2033365B (fr) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4309391A (en) * | 1980-12-03 | 1982-01-05 | United States Gypsum Company | Lump process alpha gypsum |
CA1258961A (fr) * | 1984-09-17 | 1989-09-05 | Yoshihiko Kudo | METHODE DE PREPARATION DE GYPSE SEMI-HYDRATE DE FORME .alpha. |
US5169444A (en) * | 1986-02-20 | 1992-12-08 | Gebruder Knauf Westdeutsche Gipswerke Kg | Process for preparing calcium sulfate anhydrite |
US9840066B2 (en) | 2005-06-09 | 2017-12-12 | United States Gypsum Company | Light weight gypsum board |
USRE44070E1 (en) | 2005-06-09 | 2013-03-12 | United States Gypsum Company | Composite light weight gypsum wallboard |
US20080070026A1 (en) * | 2005-06-09 | 2008-03-20 | United States Gypsum Company | High hydroxyethylated starch and high dispersant levels in gypsum wallboard |
US11306028B2 (en) | 2005-06-09 | 2022-04-19 | United States Gypsum Company | Light weight gypsum board |
US7731794B2 (en) * | 2005-06-09 | 2010-06-08 | United States Gypsum Company | High starch light weight gypsum wallboard |
US9802866B2 (en) | 2005-06-09 | 2017-10-31 | United States Gypsum Company | Light weight gypsum board |
US11338548B2 (en) | 2005-06-09 | 2022-05-24 | United States Gypsum Company | Light weight gypsum board |
US7771851B2 (en) * | 2005-08-26 | 2010-08-10 | United States Gypsum Company | Gypsum-containing products containing alpha hemihydrate |
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 |
EP2163532A1 (fr) * | 2008-09-11 | 2010-03-17 | Claudius Peters Technologies GmbH | Procédé et installation destinés à la fabrication de plâtre dur |
US8226766B2 (en) | 2010-12-22 | 2012-07-24 | United States Gypsum Company | Set accelerator for gypsum hydration |
US9169160B2 (en) | 2012-08-27 | 2015-10-27 | Yoshino Gypsum Co., Ltd. | Process for manufacturing high-expansion gypsum plaster composition and high-expansion gypsum plaster composition obtained by said process |
US20150158997A1 (en) | 2013-12-06 | 2015-06-11 | Georgia-Pacific Gypsum Llc | Gypsum composite modifiers |
WO2016073393A1 (fr) * | 2014-11-03 | 2016-05-12 | Georgia-Pacific Gypsum Llc | Chauffage aux microondes pour procédés de fabrication de gypse |
TWI590842B (zh) * | 2016-07-12 | 2017-07-11 | 三鼎生物科技股份有限公司 | α-半水硫酸鈣骨移植材的製備方法 |
US11752073B2 (en) * | 2018-02-16 | 2023-09-12 | Gc Corporation | Dental gypsum powder |
WO2023229996A1 (fr) | 2022-05-27 | 2023-11-30 | United States Gypsum Company | Formule de plâtre à modeler à porosité accrue |
CN116425187A (zh) * | 2023-04-20 | 2023-07-14 | 湖南科技大学 | 一种提高磷石膏白度的方法 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1398201A (fr) * | 1964-04-24 | 1965-05-07 | Roddewig & Co | Procédé et dispositif pour fabriquer des plâtres de haute qualité |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1901051A (en) * | 1929-08-08 | 1933-03-14 | United States Gypsum Co | High strength calcined gypsum and process of manufacturing same |
US2341426A (en) * | 1940-09-30 | 1944-02-08 | United States Gypsum Co | Plaster composition and process |
US3083110A (en) * | 1961-02-13 | 1963-03-26 | Ransom & Randolph Company | Dental stone |
DE1157128B (de) * | 1962-05-25 | 1963-11-07 | Giulini Ges Mit Beschraenkter | Verfahren zur Herstellung von ª‡-Calciumsulfat-Halbhydrat aus synthetischem Calciumsulfat-Dihydrat |
DE1185526B (de) * | 1963-05-10 | 1965-01-14 | Roddewig & Co | Vorrichtung zur Herstellung hochwertiger Halbhydratgipse |
US3305375A (en) * | 1963-07-09 | 1967-02-21 | United States Gypsum Co | Plaster composition |
DE1238374B (de) * | 1965-04-24 | 1967-04-06 | Giulini Ges Mit Beschraenkter | Verfahren zur Herstellung von alpha-Calciumsulfat-Halbhydrat |
DE1592121C3 (de) * | 1967-08-16 | 1975-08-14 | Gebrueder Giulini Gmbh, 6700 Ludwigshafen | Verfahren zur kontinuierlichen Herstellung von alpha-Calciumsulfat-Halbhydrat |
DE1616146C3 (de) * | 1968-01-11 | 1975-08-14 | Gebrueder Giulini Gmbh, 6700 Ludwigshafen | Anwendung von alpha-Calclumsulfat-Halbhydrat für Gipsbinden |
US3913571A (en) * | 1968-01-11 | 1975-10-21 | Giulini Gmbh Geb | Plaster casts |
DE1805126C3 (de) * | 1968-10-25 | 1975-05-28 | H. & E. Boergardts Kg, 3425 Walkenried | Masse zur Herstellung von Arbeitsformen für die keramische Industrie |
US3723146A (en) * | 1969-04-01 | 1973-03-27 | Gypsum Co | Retarded gypsum plaster for use in long set aggregate mortar applications |
DE1923993C3 (de) * | 1969-05-10 | 1973-10-11 | Gebrueder Giulini Gmbh, 6700 Ludwigshafen | Verfahren zur Steuerung von Kn Stalltracht und wachstum bei der hy drothermalen Herstellung von alpha Calcium sulfat Halbhydrat |
DE2006366C3 (de) * | 1970-02-12 | 1981-09-17 | Giulini Chemie Gmbh, 6700 Ludwigshafen | Verfahren und Vorrichtung zur schonenden, Verklebungen und Anbackungen vermeidenden Behandlung von Calciumsulfat- Hydrat-Kristallen |
DE2165221B2 (de) * | 1971-12-29 | 1976-06-16 | Spachtel- und putmassen mit verbesserten plastischen eigenschaften | |
JPS5095321A (fr) * | 1973-12-25 | 1975-07-29 |
-
1978
- 1978-10-11 DE DE2844266A patent/DE2844266C2/de not_active Expired
-
1979
- 1979-08-13 FR FR7921111A patent/FR2438634A1/fr active Granted
- 1979-10-10 CA CA337,274A patent/CA1112844A/fr not_active Expired
- 1979-10-11 US US06/083,834 patent/US4234345A/en not_active Expired - Lifetime
- 1979-10-11 GB GB7935385A patent/GB2033365B/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1398201A (fr) * | 1964-04-24 | 1965-05-07 | Roddewig & Co | Procédé et dispositif pour fabriquer des plâtres de haute qualité |
Also Published As
Publication number | Publication date |
---|---|
GB2033365A (en) | 1980-05-21 |
GB2033365B (en) | 1982-09-29 |
DE2844266C2 (de) | 1984-10-31 |
FR2438634B1 (fr) | 1984-10-05 |
US4234345A (en) | 1980-11-18 |
DE2844266A1 (de) | 1980-04-24 |
DE2844266C3 (fr) | 1990-02-15 |
CA1112844A (fr) | 1981-11-24 |
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