FR2438634A1 - Procede de fabrication d'hemihydrate de sulfate de calcium alpha - Google Patents

Procede de fabrication d'hemihydrate de sulfate de calcium alpha

Info

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
Application number
FR7921111A
Other languages
English (en)
Other versions
FR2438634B1 (fr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BK Giulini Chemie GmbH
Original Assignee
Giulini Chemie GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Giulini Chemie GmbH filed Critical Giulini Chemie GmbH
Publication of FR2438634A1 publication Critical patent/FR2438634A1/fr
Application granted granted Critical
Publication of FR2438634B1 publication Critical patent/FR2438634B1/fr
Granted legal-status Critical Current

Links

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.
FR7921111A 1978-10-11 1979-08-13 Procede de fabrication d'hemihydrate de sulfate de calcium alpha Granted FR2438634A1 (fr)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (1)

* Cited by examiner, † Cited by third party
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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