JPS565321A - Continuous preparation of light weight gypsum - Google Patents

Continuous preparation of light weight gypsum

Info

Publication number
JPS565321A
JPS565321A JP8013579A JP8013579A JPS565321A JP S565321 A JPS565321 A JP S565321A JP 8013579 A JP8013579 A JP 8013579A JP 8013579 A JP8013579 A JP 8013579A JP S565321 A JPS565321 A JP S565321A
Authority
JP
Japan
Prior art keywords
reactor
gypsum
slurry
water
aqueous slurry
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.)
Pending
Application number
JP8013579A
Other languages
Japanese (ja)
Inventor
Masahiko Shiraishi
Hiroshi Nishitani
Toshikuni Minahara
Shingo Isshiki
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
Priority to JP8013579A priority Critical patent/JPS565321A/en
Publication of JPS565321A publication Critical patent/JPS565321A/en
Pending 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

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)

Abstract

PURPOSE: To efficiently provide constant quality product in a short period of time by a method wherein aqueous slurry of raw gypsum is continuously charged into a pressure reactor for hydrothermal reaction, then is continuously discharged.
CONSTITUTION: Aqueous slurry of raw gypsum is adjusted in a slurry adjusting tank 1, and is continuously charged, for example, into a horizontal reactor 2 by pump 7. In the reactor 2, the slurry is heated to 105W170°C, or preferably to 120W 150°C so that hydrothermal reaction proceeds. The reaction product is continuously discharged from the reactor, enters a reservoir tank 3, is guided into a liquid-solid separator 5 to remove water content, then is taken out as wet product. In this method, gypsum dihydrate, gypsum hemihydrate, soluble anhydrous gympsum, or their mixture is preferably used. As solvent for aqueous slurry, water, aqueous acid solution, or water-soluble organic solvent-contg. water solution may be used.
COPYRIGHT: (C)1981,JPO&Japio
JP8013579A 1979-06-27 1979-06-27 Continuous preparation of light weight gypsum Pending JPS565321A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8013579A JPS565321A (en) 1979-06-27 1979-06-27 Continuous preparation of light weight gypsum

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8013579A JPS565321A (en) 1979-06-27 1979-06-27 Continuous preparation of light weight gypsum

Publications (1)

Publication Number Publication Date
JPS565321A true JPS565321A (en) 1981-01-20

Family

ID=13709795

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8013579A Pending JPS565321A (en) 1979-06-27 1979-06-27 Continuous preparation of light weight gypsum

Country Status (1)

Country Link
JP (1) JPS565321A (en)

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