JPS5299993A - Production of 2-type alpha hemihydrate gypsum of needle-like crystal from phosphoric acid by-product dihydrate gypsum - Google Patents

Production of 2-type alpha hemihydrate gypsum of needle-like crystal from phosphoric acid by-product dihydrate gypsum

Info

Publication number
JPS5299993A
JPS5299993A JP1612576A JP1612576A JPS5299993A JP S5299993 A JPS5299993 A JP S5299993A JP 1612576 A JP1612576 A JP 1612576A JP 1612576 A JP1612576 A JP 1612576A JP S5299993 A JPS5299993 A JP S5299993A
Authority
JP
Japan
Prior art keywords
gypsum
needle
phosphoric acid
crystal
production
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
JP1612576A
Other languages
Japanese (ja)
Other versions
JPS5834413B2 (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 JP1612576A priority Critical patent/JPS5834413B2/en
Publication of JPS5299993A publication Critical patent/JPS5299993A/en
Publication of JPS5834413B2 publication Critical patent/JPS5834413B2/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
    • 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

Abstract

PURPOSE: To easily obtain α-type hemihydrate gypsum of needle-like crystal even when the mother liquor is recycled, by preparing gypsum slurry from phosphoric 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
JP1612576A 1976-02-17 1976-02-17 Method for producing α-type hemihydrate gypsum having needle-like crystals from phosphoric acid by-product dihydrate gypsum Expired JPS5834413B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1612576A JPS5834413B2 (en) 1976-02-17 1976-02-17 Method for producing α-type hemihydrate gypsum having needle-like crystals from phosphoric acid by-product dihydrate gypsum

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1612576A JPS5834413B2 (en) 1976-02-17 1976-02-17 Method for producing α-type hemihydrate gypsum having needle-like crystals from phosphoric acid by-product dihydrate gypsum

Publications (2)

Publication Number Publication Date
JPS5299993A true JPS5299993A (en) 1977-08-22
JPS5834413B2 JPS5834413B2 (en) 1983-07-26

Family

ID=11907774

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1612576A Expired JPS5834413B2 (en) 1976-02-17 1976-02-17 Method for producing α-type hemihydrate gypsum having needle-like crystals from phosphoric acid by-product dihydrate gypsum

Country Status (1)

Country Link
JP (1) JPS5834413B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105154979A (en) * 2015-09-18 2015-12-16 金正大诺泰尔化学有限公司 Method for producing wet-process phosphoric acid and coproducing alpha-semi-hydrated gypsum whisker and high-purity high-whiteness alpha-semi-hydrated gypsum whisker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105154979A (en) * 2015-09-18 2015-12-16 金正大诺泰尔化学有限公司 Method for producing wet-process phosphoric acid and coproducing alpha-semi-hydrated gypsum whisker and high-purity high-whiteness alpha-semi-hydrated gypsum whisker

Also Published As

Publication number Publication date
JPS5834413B2 (en) 1983-07-26

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