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GB2076791B - Alpha calcium sulfate hemihydrate production - Google Patents

Alpha calcium sulfate hemihydrate production

Info

Publication number
GB2076791B
GB2076791B GB8111034A GB8111034A GB2076791B GB 2076791 B GB2076791 B GB 2076791B GB 8111034 A GB8111034 A GB 8111034A GB 8111034 A GB8111034 A GB 8111034A GB 2076791 B GB2076791 B GB 2076791B
Authority
GB
United Kingdom
Prior art keywords
calcium sulfate
sulfate hemihydrate
alpha calcium
production
hemihydrate production
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.)
Expired
Application number
GB8111034A
Other versions
GB2076791A (en
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.)
Idemitsu Kosan Co Ltd
Original Assignee
Idemitsu Kosan Co Ltd
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 Idemitsu Kosan Co Ltd filed Critical Idemitsu Kosan Co Ltd
Publication of GB2076791A publication Critical patent/GB2076791A/en
Application granted granted Critical
Publication of GB2076791B publication Critical patent/GB2076791B/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/10—Particle morphology extending in one dimension, e.g. needle-like
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/10—Solid density

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
GB8111034A 1980-04-14 1981-04-08 Alpha calcium sulfate hemihydrate production Expired GB2076791B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4803780A JPS56145116A (en) 1980-04-14 1980-04-14 Continuous preparation of light gypsum

Publications (2)

Publication Number Publication Date
GB2076791A GB2076791A (en) 1981-12-09
GB2076791B true GB2076791B (en) 1983-03-09

Family

ID=12792108

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8111034A Expired GB2076791B (en) 1980-04-14 1981-04-08 Alpha calcium sulfate hemihydrate production

Country Status (6)

Country Link
JP (1) JPS56145116A (en)
CA (1) CA1175209A (en)
DE (1) DE3114363C2 (en)
FR (1) FR2480267A1 (en)
GB (1) GB2076791B (en)
IT (1) IT1170883B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3239669A1 (en) * 1982-10-27 1984-05-03 Joh. A. Benckiser Gmbh, 6700 Ludwigshafen CONTINUOUS PROCESS FOR THE PRODUCTION OF INDUSTRIAL RECYCLABLE PLASTER FROM INDUSTRIAL WASTE PLASTER
DE3536321A1 (en) * 1985-10-11 1987-04-23 Bischoff Gasreinigung Process and reactor for producing alpha-hemihydrate gypsum from calcium sulphate dihydrate from flue gas desulphurisation plants operating by the wet scrubbing process with lime
DE3615739A1 (en) * 1986-05-09 1987-11-12 Benckiser Gmbh Joh A CONTINUOUS METHOD AND DEVICE FOR PRODUCING INDUSTRIALLY RECYCLABLE PLASTER FROM INDUSTRIAL WASTE PLASTER
DE3711367A1 (en) * 1987-04-04 1988-10-13 Rwk Rhein Westfael Kalkwerke Process for preparing calcium sulphate hemihydrate
DE3819652C3 (en) * 1987-05-22 1996-08-01 Pro Mineral Ges Process for the production of calcium sulfate alpha hemihydrate suitable as a building material from moist, finely divided flue gas desulfurization gypsum and its use
WO1990011256A1 (en) * 1989-03-16 1990-10-04 The United States Gypsum Company Process and apparatus for producing calcium sulfate microfibers
US7765813B2 (en) * 2004-07-15 2010-08-03 United States Gypsum Company Apparatus and process for cooling and de-steaming calcined stucco
CN103723757B (en) * 2012-10-10 2015-08-05 深圳兰度生物材料有限公司 Medical grade α-calcium sulphate hemihydrate preparation method
EP3782725A1 (en) * 2019-08-21 2021-02-24 Nederlandse Organisatie voor toegepast- natuurwetenschappelijk Onderzoek TNO Reactor for the hydrothermal treatment of biomass

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1051849A (en) * 1963-12-03
GB1198807A (en) * 1963-12-03 1970-07-15 Ici Ltd Continuous process for the production of calcium sulphate alpha-hemihydrate from gypsum
US3977890A (en) * 1972-08-16 1976-08-31 Johns-Manville Corporation Method for the preparation of fibrous calcium sulfate hemihydrate
JPS5143833A (en) * 1974-10-11 1976-04-14 Nishida Marine Boiler KIFUKUGEETOSOCHI
JPS5187494A (en) * 1975-01-31 1976-07-31 Idemitsu Kosan Co Setsukoisukaano seizohoho
JPS5319366A (en) * 1976-08-06 1978-02-22 Mitsubishi Chem Ind Ltd Resin compositions
JPS5817132B2 (en) * 1976-11-29 1983-04-05 出光興産株式会社 Spherical settsukou and its manufacturing method
JPS53128624A (en) * 1977-04-16 1978-11-09 Idemitsu Kosan Co Gypsum compound
US4152408A (en) * 1977-11-25 1979-05-01 Certain-Teed Corporation Fibrous calcium sulfate
JPS5857384B2 (en) * 1978-04-04 1983-12-20 株式会社クボタ Gypsum firing method and equipment
JPS54152692A (en) * 1978-05-22 1979-12-01 Kanegafuchi Chem Ind Co Ltd Continuous manufacture of gypsum needle-like crystal

Also Published As

Publication number Publication date
JPS6320785B2 (en) 1988-04-30
CA1175209A (en) 1984-10-02
FR2480267A1 (en) 1981-10-16
DE3114363C2 (en) 1985-12-05
JPS56145116A (en) 1981-11-11
FR2480267B1 (en) 1984-12-28
GB2076791A (en) 1981-12-09
IT1170883B (en) 1987-06-03
DE3114363A1 (en) 1982-03-04
IT8148251A0 (en) 1981-04-10

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930408