JPS53141195A - Process for producing aculeate crystal of alpha hemihydrate gypsum - Google Patents

Process for producing aculeate crystal of alpha hemihydrate gypsum

Info

Publication number
JPS53141195A
JPS53141195A JP5673677A JP5673677A JPS53141195A JP S53141195 A JPS53141195 A JP S53141195A JP 5673677 A JP5673677 A JP 5673677A JP 5673677 A JP5673677 A JP 5673677A JP S53141195 A JPS53141195 A JP S53141195A
Authority
JP
Japan
Prior art keywords
crystal
aculeate
producing
hemihydrate gypsum
alpha 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
JP5673677A
Other languages
Japanese (ja)
Other versions
JPS5748489B2 (en
Inventor
Masaharu Abe
Yasuo Fushiki
Yutaka Konoo
Shiyouji Uozumi
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 JP5673677A priority Critical patent/JPS53141195A/en
Publication of JPS53141195A publication Critical patent/JPS53141195A/en
Publication of JPS5748489B2 publication Critical patent/JPS5748489B2/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)
  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

PURPOSE: To provide the subject process comprising the steps of adding to an aqueous slurry of a dihydrate gypsum powder a II-type anhydrous gypsum powder as a seed crystal, and heating the mixture powder with stirring and under pressure, thereby producing an aculeate crystal of α-type hemihydrate gypsum of ine diameter adapted for bombining plastics and the like.
COPYRIGHT: (C)1978,JPO&Japio
JP5673677A 1977-05-16 1977-05-16 Process for producing aculeate crystal of alpha hemihydrate gypsum Granted JPS53141195A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5673677A JPS53141195A (en) 1977-05-16 1977-05-16 Process for producing aculeate crystal of alpha hemihydrate gypsum

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5673677A JPS53141195A (en) 1977-05-16 1977-05-16 Process for producing aculeate crystal of alpha hemihydrate gypsum

Publications (2)

Publication Number Publication Date
JPS53141195A true JPS53141195A (en) 1978-12-08
JPS5748489B2 JPS5748489B2 (en) 1982-10-16

Family

ID=13035792

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5673677A Granted JPS53141195A (en) 1977-05-16 1977-05-16 Process for producing aculeate crystal of alpha hemihydrate gypsum

Country Status (1)

Country Link
JP (1) JPS53141195A (en)

Also Published As

Publication number Publication date
JPS5748489B2 (en) 1982-10-16

Similar Documents

Publication Publication Date Title
GB1549029A (en) Process for the conversion of gypsum into calcium sulphate hemihydrate
JPS5248594A (en) Method for producing type gypsum hemihydrate
ES481778A1 (en) Automatic calcining kettle
JPS53141195A (en) Process for producing aculeate crystal of alpha hemihydrate gypsum
JPS53141194A (en) Process for producing aculeate crystal of alpha type hemihydrate gypsum
JPS5437097A (en) Method of producting fine diameter gypsum acicular crystaline fiber
JPS5261197A (en) Process for production of needle-like alpha-type gypsum hemihydrate
JPS52156199A (en) Production of gypsum fiber
JPS5428797A (en) Process for producing anhydrous dicalcium phosphate
JPS537596A (en) Production of fine gypsum needle crystals
JPS5218496A (en) Process for production of alpha-type gypsum hemi-hydrate from sulfur oxide in the waste gas
JPS5329297A (en) Production of gypsum long fibers
JPS55162426A (en) Manufacture of alpha-type hemihydrate gypsum
JPS5261198A (en) Process for production of prismatic alpha-type gypsum hemihydrate
JPS51146408A (en) Process for preparation of glycerylethers
JPS532626A (en) Production of long gypsum fibers
JPS51147500A (en) Method of producing alkali silicate solution with high molar ratio
JPS51115912A (en) Method for producing novel plaster
JPS5399098A (en) Gypsum needle crystal fibers suitable for compounding and preparation thereof
JPS5410682A (en) Production of semiconductor elements
JPS5342195A (en) Production of long-fibered hemihydrate gypsum crystals
JPS5299992A (en) Production of alpha-type hemihydrate gypsum of prismatic crystal from phosphoric acid by-product dihydrate gypsum
JPS52123996A (en) Production of alpha-type hemihydrate gypsum of needle-like crystal
JPS5299993A (en) Production of 2-type alpha hemihydrate gypsum of needle-like crystal from phosphoric acid by-product dihydrate gypsum
JPS5239599A (en) Production of hexagonal boron nitride