AU1399188A - Process for converting calcium sulphate dihydrate into alpha-hemihydrate - Google Patents

Process for converting calcium sulphate dihydrate into alpha-hemihydrate

Info

Publication number
AU1399188A
AU1399188A AU13991/88A AU1399188A AU1399188A AU 1399188 A AU1399188 A AU 1399188A AU 13991/88 A AU13991/88 A AU 13991/88A AU 1399188 A AU1399188 A AU 1399188A AU 1399188 A AU1399188 A AU 1399188A
Authority
AU
Australia
Prior art keywords
hemihydrate
alpha
calcium sulphate
sulphate dihydrate
converting 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
AU13991/88A
Other versions
AU617665B2 (en
Inventor
Jorg Bold
Frank Fink
Jurgen Umlauf
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.)
Fink Fran W Dr-Ing
Original Assignee
Fink Fran W Dr Ing
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 Fink Fran W Dr Ing filed Critical Fink Fran W Dr Ing
Publication of AU1399188A publication Critical patent/AU1399188A/en
Application granted granted Critical
Publication of AU617665B2 publication Critical patent/AU617665B2/en
Anticipated expiration legal-status Critical
Ceased 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
    • C04B11/26—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke
    • C04B11/262—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke waste gypsum other than phosphogypsum
    • C04B11/264—Gypsum from the desulfurisation of flue gases
    • 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
    • C04B11/024—Ingredients added before, or during, the calcining process, e.g. calcination modifiers
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines

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)
  • Treating Waste Gases (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
AU13991/88A 1987-03-21 1988-03-18 Process for converting calcium sulphate dihydrate into alpha-hemihydrate Ceased AU617665B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3709393 1987-03-21
DE19873709393 DE3709393A1 (en) 1987-03-21 1987-03-21 METHOD FOR CONVERTING CALCIUM SULFATE DIHYDRATE IN (ALPHA) -HALBHYDRATE

Publications (2)

Publication Number Publication Date
AU1399188A true AU1399188A (en) 1988-11-02
AU617665B2 AU617665B2 (en) 1991-12-05

Family

ID=6323720

Family Applications (1)

Application Number Title Priority Date Filing Date
AU13991/88A Ceased AU617665B2 (en) 1987-03-21 1988-03-18 Process for converting calcium sulphate dihydrate into alpha-hemihydrate

Country Status (4)

Country Link
EP (1) EP0306511B1 (en)
AU (1) AU617665B2 (en)
DE (2) DE3709393A1 (en)
WO (1) WO1988007502A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2418184B2 (en) 2010-08-12 2021-02-17 Lindner GFT GmbH Method for manufacturing alpha-calcium sulphate hemi-hydrate
CN105948547B (en) * 2016-07-12 2017-10-31 山东博瑞新材料科技有限公司 A kind of method that utilization calcium sulphate dihydrate prepares α type half-H 2 O calcium sulphates

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1101771A (en) * 1963-08-14 1968-01-31 Bpb Industries Ltd Improvements relating to the production of gypsum plaster
DE2310799A1 (en) * 1972-03-08 1973-09-13 United States Gypsum Co Low consistency gypsum hemihydrate - prepd by gypsum dihydrate conversion
GB1438632A (en) * 1972-09-01 1976-06-09 Bpb Industries Ltd Calcination of gypsum
DE3119749C2 (en) * 1981-05-18 1984-11-08 Steag Ag, 4300 Essen Process for the production of calcium sulfate hemihydrate from flue gas gypsum
CA1258961A (en) * 1984-09-17 1989-09-05 Yoshihiko Kudo PROCESS FOR PRODUCING .alpha.-FORM GYPSUM HEMIHYDRATE

Also Published As

Publication number Publication date
EP0306511A1 (en) 1989-03-15
DE3709393A1 (en) 1988-09-29
WO1988007502A1 (en) 1988-10-06
AU617665B2 (en) 1991-12-05
DE3876180D1 (en) 1993-01-07
EP0306511B1 (en) 1992-11-25

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Legal Events

Date Code Title Description
MK14 Patent ceased section 143(a) (annual fees not paid) or expired