JPS52123996A - Production of alpha-type hemihydrate gypsum of needle-like crystal - Google Patents

Production of alpha-type hemihydrate gypsum of needle-like crystal

Info

Publication number
JPS52123996A
JPS52123996A JP4110676A JP4110676A JPS52123996A JP S52123996 A JPS52123996 A JP S52123996A JP 4110676 A JP4110676 A JP 4110676A JP 4110676 A JP4110676 A JP 4110676A JP S52123996 A JPS52123996 A JP S52123996A
Authority
JP
Japan
Prior art keywords
crystal
needle
alpha
production
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
JP4110676A
Other languages
Japanese (ja)
Other versions
JPS5835936B2 (en
Inventor
Katsumi Kojima
Yoshio Kanemasa
Shiro Furukawa
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.)
Mitsubishi Kasei Corp
Original Assignee
Mitsubishi Kasei Corp
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 Mitsubishi Kasei Corp filed Critical Mitsubishi Kasei Corp
Priority to JP4110676A priority Critical patent/JPS5835936B2/en
Publication of JPS52123996A publication Critical patent/JPS52123996A/en
Publication of JPS5835936B2 publication Critical patent/JPS5835936B2/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

Abstract

PURPOSE: To smoothly facilitate the reaction of a water slurry of dihydrate gypsum or CaCO3 in the presence of specified metal ion under pressure by heating the slurry or heating it while supplying oxygen so as to obtain α-type hemidhydrate gypsum of excellent needle-like crystal.
COPYRIGHT: (C)1977,JPO&Japio
JP4110676A 1976-04-12 1976-04-12 Method for producing α-type hemihydrate gypsum having needle-like crystals Expired JPS5835936B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4110676A JPS5835936B2 (en) 1976-04-12 1976-04-12 Method for producing α-type hemihydrate gypsum having needle-like crystals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4110676A JPS5835936B2 (en) 1976-04-12 1976-04-12 Method for producing α-type hemihydrate gypsum having needle-like crystals

Publications (2)

Publication Number Publication Date
JPS52123996A true JPS52123996A (en) 1977-10-18
JPS5835936B2 JPS5835936B2 (en) 1983-08-05

Family

ID=12599212

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4110676A Expired JPS5835936B2 (en) 1976-04-12 1976-04-12 Method for producing α-type hemihydrate gypsum having needle-like crystals

Country Status (1)

Country Link
JP (1) JPS5835936B2 (en)

Also Published As

Publication number Publication date
JPS5835936B2 (en) 1983-08-05

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