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GB2198721B - Process for preparing alpha-calcium sulfate hemihydrate. - Google Patents

Process for preparing alpha-calcium sulfate hemihydrate.

Info

Publication number
GB2198721B
GB2198721B GB8723625A GB8723625A GB2198721B GB 2198721 B GB2198721 B GB 2198721B GB 8723625 A GB8723625 A GB 8723625A GB 8723625 A GB8723625 A GB 8723625A GB 2198721 B GB2198721 B GB 2198721B
Authority
GB
United Kingdom
Prior art keywords
calcium sulfate
sulfate hemihydrate
preparing alpha
alpha
preparing
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 - Fee Related
Application number
GB8723625A
Other versions
GB2198721A (en
GB8723625D0 (en
Inventor
Harald Gutmayer
Wieland Kelm
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.)
KRC Umwelttechnik GmbH
Original Assignee
KRC Umwelttechnik 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 KRC Umwelttechnik GmbH filed Critical KRC Umwelttechnik GmbH
Publication of GB8723625D0 publication Critical patent/GB8723625D0/en
Publication of GB2198721A publication Critical patent/GB2198721A/en
Application granted granted Critical
Publication of GB2198721B publication Critical patent/GB2198721B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Geology (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Treating Waste Gases (AREA)
GB8723625A 1986-10-08 1987-10-08 Process for preparing alpha-calcium sulfate hemihydrate. Expired - Fee Related GB2198721B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19863634204 DE3634204C1 (en) 1986-10-08 1986-10-08 Process for the preparation of alpha calcium sulfate hemihydrate

Publications (3)

Publication Number Publication Date
GB8723625D0 GB8723625D0 (en) 1987-11-11
GB2198721A GB2198721A (en) 1988-06-22
GB2198721B true GB2198721B (en) 1990-05-09

Family

ID=6311260

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8723625A Expired - Fee Related GB2198721B (en) 1986-10-08 1987-10-08 Process for preparing alpha-calcium sulfate hemihydrate.

Country Status (2)

Country Link
DE (1) DE3634204C1 (en)
GB (1) GB2198721B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013200119A1 (en) 2013-01-08 2014-07-10 Henkel Ag & Co. Kgaa Water-resistant binder based on α-CaSO4 · 0.5 H2O
DE102013200122A1 (en) 2013-01-08 2014-07-10 Henkel Ag & Co. Kgaa Water-resistant binder based on calcium sulfate
CN108821620B (en) * 2018-08-23 2024-02-02 湖南金凤凰建材家居集成科技有限公司 Continuous production equipment for producing high-strength gypsum by free water crystal transformation method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3119749C2 (en) * 1981-05-18 1984-11-08 Steag Ag, 4300 Essen Process for the production of calcium sulfate hemihydrate from flue gas gypsum

Also Published As

Publication number Publication date
GB2198721A (en) 1988-06-22
DE3634204C1 (en) 1988-05-11
GB8723625D0 (en) 1987-11-11

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Legal Events

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

Effective date: 19931008