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JPS5275694A - Production of gypsum - Google Patents

Production of gypsum

Info

Publication number
JPS5275694A
JPS5275694A JP15187375A JP15187375A JPS5275694A JP S5275694 A JPS5275694 A JP S5275694A JP 15187375 A JP15187375 A JP 15187375A JP 15187375 A JP15187375 A JP 15187375A JP S5275694 A JPS5275694 A JP S5275694A
Authority
JP
Japan
Prior art keywords
gypsum
dihydrate
production
decomposing
range
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
JP15187375A
Other languages
Japanese (ja)
Inventor
Kuninori Sato
Kenji Kitajima
Haruaki Kaneko
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.)
Asahi Chemical Industry Co Ltd
Original Assignee
Asahi Chemical Industry Co 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 Asahi Chemical Industry Co Ltd filed Critical Asahi Chemical Industry Co Ltd
Priority to JP15187375A priority Critical patent/JPS5275694A/en
Publication of JPS5275694A publication Critical patent/JPS5275694A/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 high purity and good quality gypsum dihydrate by decomposing rock phosphate with acid solution including nitric acid. In this process, the mole ratio SO3/CaO in decomposing solution is fixed within specified range and gypsum is caused to crystallize in the range of dihydrate.
COPYRIGHT: (C)1977,JPO&Japio
JP15187375A 1975-12-22 1975-12-22 Production of gypsum Pending JPS5275694A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15187375A JPS5275694A (en) 1975-12-22 1975-12-22 Production of gypsum

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15187375A JPS5275694A (en) 1975-12-22 1975-12-22 Production of gypsum

Publications (1)

Publication Number Publication Date
JPS5275694A true JPS5275694A (en) 1977-06-24

Family

ID=15528069

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15187375A Pending JPS5275694A (en) 1975-12-22 1975-12-22 Production of gypsum

Country Status (1)

Country Link
JP (1) JPS5275694A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4936874A (en) * 1972-08-12 1974-04-05

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4936874A (en) * 1972-08-12 1974-04-05

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