JPS5299992A - Production of alpha-type hemihydrate gypsum of prismatic crystal from phosphoric acid by-product dihydrate gypsum - Google Patents

Production of alpha-type hemihydrate gypsum of prismatic crystal from phosphoric acid by-product dihydrate gypsum

Info

Publication number
JPS5299992A
JPS5299992A JP1612476A JP1612476A JPS5299992A JP S5299992 A JPS5299992 A JP S5299992A JP 1612476 A JP1612476 A JP 1612476A JP 1612476 A JP1612476 A JP 1612476A JP S5299992 A JPS5299992 A JP S5299992A
Authority
JP
Japan
Prior art keywords
gypsum
alpha
production
phosphoric acid
type hemihydrate
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
JP1612476A
Other languages
Japanese (ja)
Other versions
JPS5834412B2 (en
Inventor
Yukio Takigawa
Toshinori Tsutsumi
Yoshio Kanemasa
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 JP1612476A priority Critical patent/JPS5834412B2/en
Publication of JPS5299992A publication Critical patent/JPS5299992A/en
Publication of JPS5834412B2 publication Critical patent/JPS5834412B2/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
    • 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 easily obtain α-type hemihydrate gypsum of prismatic crystal even when the mother liquor is recycled, by preparing gypsum slurry fromphosphoric acid by-product dihydrate gypsum and water, heating, and reacting the slurry while maintaining the pH at specific value in acid side.
COPYRIGHT: (C)1977,JPO&Japio
JP1612476A 1976-02-17 1976-02-17 Method for producing α-type hemihydrate gypsum having columnar crystals from phosphoric acid by-product dihydrate gypsum Expired JPS5834412B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1612476A JPS5834412B2 (en) 1976-02-17 1976-02-17 Method for producing α-type hemihydrate gypsum having columnar crystals from phosphoric acid by-product dihydrate gypsum

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1612476A JPS5834412B2 (en) 1976-02-17 1976-02-17 Method for producing α-type hemihydrate gypsum having columnar crystals from phosphoric acid by-product dihydrate gypsum

Publications (2)

Publication Number Publication Date
JPS5299992A true JPS5299992A (en) 1977-08-22
JPS5834412B2 JPS5834412B2 (en) 1983-07-26

Family

ID=11907748

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1612476A Expired JPS5834412B2 (en) 1976-02-17 1976-02-17 Method for producing α-type hemihydrate gypsum having columnar crystals from phosphoric acid by-product dihydrate gypsum

Country Status (1)

Country Link
JP (1) JPS5834412B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110040991A (en) * 2019-05-07 2019-07-23 东北大学 A method of quickly preparing short cylinder sulfate hemihydrate calcium material using calcium sulphate dihydrate
CN115490445A (en) * 2022-08-16 2022-12-20 聊城信源集团有限公司 Gypsum quality optimization method based on disc dehydrator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110040991A (en) * 2019-05-07 2019-07-23 东北大学 A method of quickly preparing short cylinder sulfate hemihydrate calcium material using calcium sulphate dihydrate
CN115490445A (en) * 2022-08-16 2022-12-20 聊城信源集团有限公司 Gypsum quality optimization method based on disc dehydrator

Also Published As

Publication number Publication date
JPS5834412B2 (en) 1983-07-26

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