JPS55144416A - Manufacture of light weight spherical gypsum - Google Patents

Manufacture of light weight spherical gypsum

Info

Publication number
JPS55144416A
JPS55144416A JP5253379A JP5253379A JPS55144416A JP S55144416 A JPS55144416 A JP S55144416A JP 5253379 A JP5253379 A JP 5253379A JP 5253379 A JP5253379 A JP 5253379A JP S55144416 A JPS55144416 A JP S55144416A
Authority
JP
Japan
Prior art keywords
gypsum
light weight
spherical
air
manufacture
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
JP5253379A
Other languages
Japanese (ja)
Other versions
JPS6232132B2 (en
Inventor
Masakatsu Ota
Masahiko Shiraishi
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.)
Idemitsu Kosan Co Ltd
Original Assignee
Idemitsu Kosan 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 Idemitsu Kosan Co Ltd filed Critical Idemitsu Kosan Co Ltd
Priority to JP5253379A priority Critical patent/JPS55144416A/en
Publication of JPS55144416A publication Critical patent/JPS55144416A/en
Publication of JPS6232132B2 publication Critical patent/JPS6232132B2/ja
Granted 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)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

PURPOSE:To obtain a light weight spherical gypsum having a homogeneous and fracture-free crystal by the procedure in which gypsum is heated with stirring in an aqueous solvent in the presence of the bubbles of air or N2 introduced. CONSTITUTION:A spherical gypsum consisting of fibrous hemihydrate gypsum is manufactured by heating with stirring an aqueous solution of dihydrate (or hemihydrate) gypsum or soluble anhydrous gypsum, containing an acid, e.g., acetic acid, hydrochloric acid, etc., and a water-soluble organic substance, e.g., ethylene glycol, glycerine, etc., under the conditions: the inclusion of air or N2 together with an air entrainer or a foaming agent, e.g., saponin, soap, etc., and hydrothermal reaction at 100-180 deg.C for 1-90min, preferably 105-140 deg.C for 3- 60min. Thus, a light weight, homogeneous, and spherical gypsum having a diameter of 0.01-10mm, usually 0.05-1mm, and a bulk density of 0.01-0.1g/cm<2> can be obtained. And, the gypsum can be used in the manufacture of a light weight gypsum hardened material which is excellent in heat insulation property and so forth.
JP5253379A 1979-05-01 1979-05-01 Manufacture of light weight spherical gypsum Granted JPS55144416A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5253379A JPS55144416A (en) 1979-05-01 1979-05-01 Manufacture of light weight spherical gypsum

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5253379A JPS55144416A (en) 1979-05-01 1979-05-01 Manufacture of light weight spherical gypsum

Publications (2)

Publication Number Publication Date
JPS55144416A true JPS55144416A (en) 1980-11-11
JPS6232132B2 JPS6232132B2 (en) 1987-07-13

Family

ID=12917394

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5253379A Granted JPS55144416A (en) 1979-05-01 1979-05-01 Manufacture of light weight spherical gypsum

Country Status (1)

Country Link
JP (1) JPS55144416A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5963514U (en) * 1982-10-22 1984-04-26 クラリオン株式会社 Muting circuit
US4965031A (en) * 1989-02-24 1990-10-23 The Celotex Corporation Continuous production of gypsum board
JP2007302483A (en) * 2006-05-08 2007-11-22 Yoshino Gypsum Co Ltd Hollow spherical type ii anhydrous gypsum particle, method for producing hollow spherical type ii anhydrous gypsum particle, and porous lightweight hardened gypsum product

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5187494A (en) * 1975-01-31 1976-07-31 Idemitsu Kosan Co Setsukoisukaano seizohoho
JPS5366895A (en) * 1976-11-29 1978-06-14 Idemitsu Kosan Co Ltd Ultra lightweight spherical secondary particle gypsum and production thereof
JPS5459049U (en) * 1977-10-01 1979-04-24

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5187494A (en) * 1975-01-31 1976-07-31 Idemitsu Kosan Co Setsukoisukaano seizohoho
JPS5366895A (en) * 1976-11-29 1978-06-14 Idemitsu Kosan Co Ltd Ultra lightweight spherical secondary particle gypsum and production thereof
JPS5459049U (en) * 1977-10-01 1979-04-24

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5963514U (en) * 1982-10-22 1984-04-26 クラリオン株式会社 Muting circuit
US4965031A (en) * 1989-02-24 1990-10-23 The Celotex Corporation Continuous production of gypsum board
JP2007302483A (en) * 2006-05-08 2007-11-22 Yoshino Gypsum Co Ltd Hollow spherical type ii anhydrous gypsum particle, method for producing hollow spherical type ii anhydrous gypsum particle, and porous lightweight hardened gypsum product

Also Published As

Publication number Publication date
JPS6232132B2 (en) 1987-07-13

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