JPS5451995A - Preparation of gypsum - Google Patents

Preparation of gypsum

Info

Publication number
JPS5451995A
JPS5451995A JP11819177A JP11819177A JPS5451995A JP S5451995 A JPS5451995 A JP S5451995A JP 11819177 A JP11819177 A JP 11819177A JP 11819177 A JP11819177 A JP 11819177A JP S5451995 A JPS5451995 A JP S5451995A
Authority
JP
Japan
Prior art keywords
caso
gypsum
crystal plane
grows
plane
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
JP11819177A
Other languages
Japanese (ja)
Inventor
Keiichi Yamada
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP11819177A priority Critical patent/JPS5451995A/en
Publication of JPS5451995A publication Critical patent/JPS5451995A/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

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 produce CaSO42H2O, which (002) plane extremely grows, by once changing CaSO42H2O, which (002) crystal plane slowly grows, into CaSO41/2H2O, and by recrystallizing it by adding water.
CONSTITUTION: CaSO41/2H2O is produced by heating drying said CaSO42H2O under conditions, such as, a condition at 110°C and for 6 hrs., etc. The CaSO41/2H2O is recrystallized by addition mixing not less than 25 wt. % water to it. Thus is obtained gypsum with the large diffraction X ray strength ratio of (002) crystal plane to (020) crystal plane. The gypsum is used for synthesizing calciumaiuminatetrisulfatehydrate (3CaO.Al2O3.3CaSO4.31W32H2O), and can accelerate its reaction velocity
COPYRIGHT: (C)1979,JPO&Japio
JP11819177A 1977-09-30 1977-09-30 Preparation of gypsum Pending JPS5451995A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11819177A JPS5451995A (en) 1977-09-30 1977-09-30 Preparation of gypsum

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11819177A JPS5451995A (en) 1977-09-30 1977-09-30 Preparation of gypsum

Publications (1)

Publication Number Publication Date
JPS5451995A true JPS5451995A (en) 1979-04-24

Family

ID=14730400

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11819177A Pending JPS5451995A (en) 1977-09-30 1977-09-30 Preparation of gypsum

Country Status (1)

Country Link
JP (1) JPS5451995A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5273581A (en) * 1988-06-24 1993-12-28 Promineral Gesellschaft Zur Verwendung Von Minerstoffen Mbh Method of making a hydraulic binder settable upon combination with water

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5273581A (en) * 1988-06-24 1993-12-28 Promineral Gesellschaft Zur Verwendung Von Minerstoffen Mbh Method of making a hydraulic binder settable upon combination with water

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