GB2198720B - Process for preparing alpha-calcium sulfate hemihydrate - Google Patents

Process for preparing alpha-calcium sulfate hemihydrate

Info

Publication number
GB2198720B
GB2198720B GB8723624A GB8723624A GB2198720B GB 2198720 B GB2198720 B GB 2198720B GB 8723624 A GB8723624 A GB 8723624A GB 8723624 A GB8723624 A GB 8723624A GB 2198720 B GB2198720 B GB 2198720B
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
GB8723624A
Other versions
GB2198720A (en
GB8723624D0 (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 GB8723624D0 publication Critical patent/GB8723624D0/en
Publication of GB2198720A publication Critical patent/GB2198720A/en
Application granted granted Critical
Publication of GB2198720B publication Critical patent/GB2198720B/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
    • 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
    • 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)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Treating Waste Gases (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
GB8723624A 1986-10-08 1987-10-08 Process for preparing alpha-calcium sulfate hemihydrate Expired - Fee Related GB2198720B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19863634207 DE3634207A1 (en) 1986-10-08 1986-10-08 METHOD FOR PRODUCING ALPHA CALCIUM SULFATE SEMI-HYDRATE

Publications (3)

Publication Number Publication Date
GB8723624D0 GB8723624D0 (en) 1987-11-11
GB2198720A GB2198720A (en) 1988-06-22
GB2198720B true GB2198720B (en) 1990-05-09

Family

ID=6311261

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8723624A Expired - Fee Related GB2198720B (en) 1986-10-08 1987-10-08 Process for preparing alpha-calcium sulfate hemihydrate

Country Status (2)

Country Link
DE (1) DE3634207A1 (en)
GB (1) GB2198720B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19755885B4 (en) * 1997-12-05 2007-10-31 Vattenfall Europe Generation Ag & Co. Kg Method and device for improved task of a demixed gypsum suspension on a filter cloth of a vacuum belt filter system
DE19908776C2 (en) * 1999-02-19 2002-05-23 Ver Energiewerke Ag Process and arrangement for producing high-purity alpha-calcium sulfate hemihydrate
US6652825B2 (en) * 2001-05-01 2003-11-25 National Gypsum Properties Llc Method of producing calcium sulfate alpha-hemihydrate
CN108926981A (en) * 2017-05-24 2018-12-04 沈阳铝镁设计研究院有限公司 The desulfurization of aluminium hydroxide production process flue gas and afterheat utilizing system and method

Also Published As

Publication number Publication date
DE3634207A1 (en) 1988-04-21
GB2198720A (en) 1988-06-22
GB8723624D0 (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