JPS5384900A - Production of alpha-type hemihydrate gypsum - Google Patents

Production of alpha-type hemihydrate gypsum

Info

Publication number
JPS5384900A
JPS5384900A JP15899276A JP15899276A JPS5384900A JP S5384900 A JPS5384900 A JP S5384900A JP 15899276 A JP15899276 A JP 15899276A JP 15899276 A JP15899276 A JP 15899276A JP S5384900 A JPS5384900 A JP S5384900A
Authority
JP
Japan
Prior art keywords
gypsum
alpha
production
type hemihydrate
hemihydrate gypsum
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
JP15899276A
Other languages
Japanese (ja)
Other versions
JPS6042168B2 (en
Inventor
Hiroyuki Matsumura
Tatsusaburo Nakamura
Yujiro Fujisaki
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.)
Kawasaki Heavy Industries Ltd
Original Assignee
Kawasaki Heavy Industries 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 Kawasaki Heavy Industries Ltd filed Critical Kawasaki Heavy Industries Ltd
Priority to JP15899276A priority Critical patent/JPS6042168B2/en
Publication of JPS5384900A publication Critical patent/JPS5384900A/en
Publication of JPS6042168B2 publication Critical patent/JPS6042168B2/en
Expired 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 produce the title gypsum with good crystal form and high bulk density by adding α-type hemilydrate gypsum with good crystal form and high bulk density as seed crystals to a dihydrate gypsum slurry in the presence of MgSO4 after which the slurry is heat trated at a temp. above the transition point of dihydrate gypsum to α-type hemihydrate one.
COPYRIGHT: (C)1978,JPO&Japio
JP15899276A 1976-12-30 1976-12-30 Production method of α-type hemihydrate gypsum Expired JPS6042168B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15899276A JPS6042168B2 (en) 1976-12-30 1976-12-30 Production method of α-type hemihydrate gypsum

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15899276A JPS6042168B2 (en) 1976-12-30 1976-12-30 Production method of α-type hemihydrate gypsum

Publications (2)

Publication Number Publication Date
JPS5384900A true JPS5384900A (en) 1978-07-26
JPS6042168B2 JPS6042168B2 (en) 1985-09-20

Family

ID=15683844

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15899276A Expired JPS6042168B2 (en) 1976-12-30 1976-12-30 Production method of α-type hemihydrate gypsum

Country Status (1)

Country Link
JP (1) JPS6042168B2 (en)

Also Published As

Publication number Publication date
JPS6042168B2 (en) 1985-09-20

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