JPS52131994A - Production of alpha-type hemihydrate gypsum - Google Patents

Production of alpha-type hemihydrate gypsum

Info

Publication number
JPS52131994A
JPS52131994A JP4950976A JP4950976A JPS52131994A JP S52131994 A JPS52131994 A JP S52131994A JP 4950976 A JP4950976 A JP 4950976A JP 4950976 A JP4950976 A JP 4950976A JP S52131994 A JPS52131994 A JP S52131994A
Authority
JP
Japan
Prior art keywords
alpha
production
hemihydrate gypsum
type hemihydrate
slurry
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
JP4950976A
Other languages
Japanese (ja)
Inventor
Tatsusaburo Nakamura
Moritsugu Imai
Hiroyuki Matsumura
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.)
Kawasaki Heavy Industries Ltd
Original Assignee
Kawasaki Heavy Industries 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 Kawasaki Heavy Industries Ltd filed Critical Kawasaki Heavy Industries Ltd
Priority to JP4950976A priority Critical patent/JPS52131994A/en
Publication of JPS52131994A publication Critical patent/JPS52131994A/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 inexpensively produce α-type hemihydrate gypsum with good crystal from containing little impurities by adding meagnesium sulfate and/or sulfite to CaSO3 slurry or further adding CaSO4 di-and/or hemihydrate and oxidizing the slurry with O2 -contg. gas under pressure while heating.
COPYRIGHT: (C)1977,JPO&Japio
JP4950976A 1976-04-29 1976-04-29 Production of alpha-type hemihydrate gypsum Pending JPS52131994A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4950976A JPS52131994A (en) 1976-04-29 1976-04-29 Production of alpha-type hemihydrate gypsum

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4950976A JPS52131994A (en) 1976-04-29 1976-04-29 Production of alpha-type hemihydrate gypsum

Publications (1)

Publication Number Publication Date
JPS52131994A true JPS52131994A (en) 1977-11-05

Family

ID=12833094

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4950976A Pending JPS52131994A (en) 1976-04-29 1976-04-29 Production of alpha-type hemihydrate gypsum

Country Status (1)

Country Link
JP (1) JPS52131994A (en)

Similar Documents

Publication Publication Date Title
JPS5297030A (en) Air fuel ratio controller
JPS5221296A (en) Producing method of concentrated phosphoric acid containing gypsum hem ihydrate which can be easily filtrated
JPS51112499A (en) The formation of titanium tetrachloride
JPS52131993A (en) Production of carbonyl sulfide
JPS52131994A (en) Production of alpha-type hemihydrate gypsum
JPS5218496A (en) Process for production of alpha-type gypsum hemi-hydrate from sulfur oxide in the waste gas
JPS52123996A (en) Production of alpha-type hemihydrate gypsum of needle-like crystal
JPS52108397A (en) Production of needle-like alpha-type hemihydrate gypsum
JPS5329297A (en) Production of gypsum long fibers
JPS537596A (en) Production of fine gypsum needle crystals
JPS5261197A (en) Process for production of needle-like alpha-type gypsum hemihydrate
JPS5384899A (en) Production of alpha-type hemihydrate gypsum
JPS5295578A (en) Wet process desulfurization of exhaust gas by slag
JPS5261198A (en) Process for production of prismatic alpha-type gypsum hemihydrate
JPS51111478A (en) A method of producing semiconductor crystal
JPS55162426A (en) Manufacture of alpha-type hemihydrate gypsum
JPS525698A (en) Process for production of -type gypsum hemihydrate
JPS526396A (en) Production of potassium sulfate
JPS5276273A (en) Prevention of gypsum scale formation in exhaust gas desulfurization eq uipment
JPS52111467A (en) Improved double alkali desulfurization of exhaust gas
JPS5342195A (en) Production of long-fibered hemihydrate gypsum crystals
JPS53108896A (en) Wet process production of gypsum
JPS5299992A (en) Production of alpha-type hemihydrate gypsum of prismatic crystal from phosphoric acid by-product dihydrate gypsum
JPS5314195A (en) Globular calcium sulfite and production thereof
JPS5384900A (en) Production of alpha-type hemihydrate gypsum