JPS54152692A - Continuous manufacture of gypsum needle-like crystal - Google Patents

Continuous manufacture of gypsum needle-like crystal

Info

Publication number
JPS54152692A
JPS54152692A JP6147478A JP6147478A JPS54152692A JP S54152692 A JPS54152692 A JP S54152692A JP 6147478 A JP6147478 A JP 6147478A JP 6147478 A JP6147478 A JP 6147478A JP S54152692 A JPS54152692 A JP S54152692A
Authority
JP
Japan
Prior art keywords
slurry
gypsum
crystals
needle
autoclave
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
JP6147478A
Other languages
Japanese (ja)
Other versions
JPS6146405B2 (en
Inventor
Masaharu Abe
Yasuo Fushiki
Yutaka Konoo
Koichi Nakanishi
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.)
Kanegafuchi Chemical Industry Co Ltd
Original Assignee
Kanegafuchi 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 Kanegafuchi Chemical Industry Co Ltd filed Critical Kanegafuchi Chemical Industry Co Ltd
Priority to JP6147478A priority Critical patent/JPS54152692A/en
Publication of JPS54152692A publication Critical patent/JPS54152692A/en
Publication of JPS6146405B2 publication Critical patent/JPS6146405B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

PURPOSE:To manufacture gypsum needle-like crystals suitable for use as a composite material with thermoplastic resin at a high crystallization speed by blowing steam into an aq. slurry of gypsum particles to hold the slurry at above a specified temp. when charged into an autoclave with a pump. CONSTITUTION:When raw material gypsum is dispersed in water and the resulting aq. slurry is charged into an autoclave with a pump, steam is blown into the slurry to hold the slurry at above 115 deg.C. The slurry heated to above 115 deg.C is further heated in the autoclave if necessary to complete crystallization of alpha-type hemihydrate gypsum needle-like crystals. By this method the crystals are formed at a high crystallization speed, and hence the raw material gypsum and crystallizing alpha-type hemihydrate gypsum needle-like crystals are present in a mixed state for only a short time.
JP6147478A 1978-05-22 1978-05-22 Continuous manufacture of gypsum needle-like crystal Granted JPS54152692A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6147478A JPS54152692A (en) 1978-05-22 1978-05-22 Continuous manufacture of gypsum needle-like crystal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6147478A JPS54152692A (en) 1978-05-22 1978-05-22 Continuous manufacture of gypsum needle-like crystal

Publications (2)

Publication Number Publication Date
JPS54152692A true JPS54152692A (en) 1979-12-01
JPS6146405B2 JPS6146405B2 (en) 1986-10-14

Family

ID=13172084

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6147478A Granted JPS54152692A (en) 1978-05-22 1978-05-22 Continuous manufacture of gypsum needle-like crystal

Country Status (1)

Country Link
JP (1) JPS54152692A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56145116A (en) * 1980-04-14 1981-11-11 Idemitsu Kosan Co Ltd Continuous preparation of light gypsum
JP2010527876A (en) * 2007-05-24 2010-08-19 ゲレンツェバッハ−ベーエスハー ゲーエムベーハー Process for producing .ALPHA.-calcium sulfate hemihydrate from calcium sulfate dihydrate.
CN107117841A (en) * 2017-05-02 2017-09-01 武汉理工大学 A kind of activated fibre matter sulphate aluminium cement mortar reinforcing agent and preparation method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56145116A (en) * 1980-04-14 1981-11-11 Idemitsu Kosan Co Ltd Continuous preparation of light gypsum
JPS6320785B2 (en) * 1980-04-14 1988-04-30 Idemitsu Kosan Co
JP2010527876A (en) * 2007-05-24 2010-08-19 ゲレンツェバッハ−ベーエスハー ゲーエムベーハー Process for producing .ALPHA.-calcium sulfate hemihydrate from calcium sulfate dihydrate.
CN107117841A (en) * 2017-05-02 2017-09-01 武汉理工大学 A kind of activated fibre matter sulphate aluminium cement mortar reinforcing agent and preparation method thereof
CN107117841B (en) * 2017-05-02 2020-01-14 武汉理工大学 Active cellulosic sulphoaluminate cement mortar reinforcing agent and preparation method thereof

Also Published As

Publication number Publication date
JPS6146405B2 (en) 1986-10-14

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