JPS537596A - Production of fine gypsum needle crystals - Google Patents

Production of fine gypsum needle crystals

Info

Publication number
JPS537596A
JPS537596A JP8093776A JP8093776A JPS537596A JP S537596 A JPS537596 A JP S537596A JP 8093776 A JP8093776 A JP 8093776A JP 8093776 A JP8093776 A JP 8093776A JP S537596 A JPS537596 A JP S537596A
Authority
JP
Japan
Prior art keywords
needle crystals
production
fine gypsum
gypsum
mixture
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
JP8093776A
Other languages
Japanese (ja)
Inventor
Sadahiko Yasui
Shinsuke Fukuoka
Koichi Yasui
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 JP8093776A priority Critical patent/JPS537596A/en
Publication of JPS537596A publication Critical patent/JPS537596A/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
    • 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 produce needle crystals of average diameter about 5 W 0.7μ, by heating, to a specific temperature while stirring in the water, gypsum which consists of hemihydrate gypsum, soluble anhydrite, or their mixture, or the mixture of gypsum dihydrate and them and whose apparent crystal-water mole is limited, et al.
COPYRIGHT: (C)1978,JPO&Japio
JP8093776A 1976-07-09 1976-07-09 Production of fine gypsum needle crystals Pending JPS537596A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8093776A JPS537596A (en) 1976-07-09 1976-07-09 Production of fine gypsum needle crystals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8093776A JPS537596A (en) 1976-07-09 1976-07-09 Production of fine gypsum needle crystals

Publications (1)

Publication Number Publication Date
JPS537596A true JPS537596A (en) 1978-01-24

Family

ID=13732367

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8093776A Pending JPS537596A (en) 1976-07-09 1976-07-09 Production of fine gypsum needle crystals

Country Status (1)

Country Link
JP (1) JPS537596A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4217126C2 (en) * 1991-05-24 2001-10-11 Tsudakoma Ind Co Ltd Procedure for regulating the moisture content

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4217126C2 (en) * 1991-05-24 2001-10-11 Tsudakoma Ind Co Ltd Procedure for regulating the moisture content

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
JPS537596A (en) Production of fine gypsum needle crystals
JPS5246398A (en) Method for continuous production of beta-sic
JPS5437097A (en) Method of producting fine diameter gypsum acicular crystaline fiber
JPS5329297A (en) Production of gypsum long fibers
JPS5218496A (en) Process for production of alpha-type gypsum hemi-hydrate from sulfur oxide in the waste gas
JPS5366895A (en) Ultra lightweight spherical secondary particle gypsum and production thereof
JPS55162426A (en) Manufacture of alpha-type hemihydrate gypsum
JPS5261197A (en) Process for production of needle-like alpha-type gypsum hemihydrate
JPS5299992A (en) Production of alpha-type hemihydrate gypsum of prismatic crystal from phosphoric acid by-product dihydrate gypsum
JPS52108397A (en) Production of needle-like alpha-type hemihydrate gypsum
JPS52131994A (en) Production of alpha-type hemihydrate gypsum
JPS5342195A (en) Production of long-fibered hemihydrate gypsum crystals
JPS52123996A (en) Production of alpha-type hemihydrate gypsum of needle-like crystal
JPS53141195A (en) Process for producing aculeate crystal of alpha hemihydrate gypsum
JPS5261198A (en) Process for production of prismatic alpha-type gypsum hemihydrate
JPS5299993A (en) Production of 2-type alpha hemihydrate gypsum of needle-like crystal from phosphoric acid by-product dihydrate gypsum
JPS52156199A (en) Production of gypsum fiber
JPS53141194A (en) Process for producing aculeate crystal of alpha type hemihydrate gypsum
JPS5329300A (en) Production of calcium aluminate monosulfate hydrate
FR2359801A1 (en) PROCESS FOR PREPARING A DELAYED SETTING CEMENT GROUT
JPS5399098A (en) Gypsum needle crystal fibers suitable for compounding and preparation thereof
JPS5384899A (en) Production of alpha-type hemihydrate gypsum