BE836714A - METHOD AND APPARATUS FOR THE PREPARATION OF CALCIUM SULPHATE ALPHA-HEMIHYDRATE - Google Patents

METHOD AND APPARATUS FOR THE PREPARATION OF CALCIUM SULPHATE ALPHA-HEMIHYDRATE

Info

Publication number
BE836714A
BE836714A BE162803A BE162803A BE836714A BE 836714 A BE836714 A BE 836714A BE 162803 A BE162803 A BE 162803A BE 162803 A BE162803 A BE 162803A BE 836714 A BE836714 A BE 836714A
Authority
BE
Belgium
Prior art keywords
hemihydrate
preparation
calcium sulphate
sulphate alpha
alpha
Prior art date
Application number
BE162803A
Other languages
French (fr)
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
Priority claimed from DE19742459739 external-priority patent/DE2459739C3/en
Application filed filed Critical
Publication of BE836714A publication Critical patent/BE836714A/en

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
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B11/00—Calcium sulfate cements
    • C04B11/02—Methods and apparatus for dehydrating gypsum
    • C04B11/028—Devices therefor characterised by the type of calcining devices used therefor or by the type of hemihydrate obtained
    • C04B11/032—Devices therefor characterised by the type of calcining devices used therefor or by the type of hemihydrate obtained for the wet process, e.g. dehydrating in solution or under saturated vapour conditions, i.e. to obtain alpha-hemihydrate

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Removal Of Specific Substances (AREA)
BE162803A 1974-12-18 1975-12-17 METHOD AND APPARATUS FOR THE PREPARATION OF CALCIUM SULPHATE ALPHA-HEMIHYDRATE BE836714A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742459739 DE2459739C3 (en) 1974-12-18 Process and plant for the production of calcium sulfate alpha hemihydrate

Publications (1)

Publication Number Publication Date
BE836714A true BE836714A (en) 1976-06-17

Family

ID=5933662

Family Applications (1)

Application Number Title Priority Date Filing Date
BE162803A BE836714A (en) 1974-12-18 1975-12-17 METHOD AND APPARATUS FOR THE PREPARATION OF CALCIUM SULPHATE ALPHA-HEMIHYDRATE

Country Status (14)

Country Link
AT (1) AT340445B (en)
BE (1) BE836714A (en)
BR (1) BR7508349A (en)
CH (1) CH618146A5 (en)
DK (1) DK142026C (en)
FR (1) FR2294985A1 (en)
GB (1) GB1474839A (en)
IE (1) IE42222B1 (en)
LU (1) LU74027A1 (en)
NL (1) NL172142C (en)
PL (1) PL109429B1 (en)
RO (1) RO67270A (en)
SE (1) SE405844B (en)
SU (1) SU805943A3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0085382A1 (en) * 1982-02-01 1983-08-10 Quante, Heinrich Installation for the production of alpha-calcium sulfate
CN111517355A (en) * 2020-05-05 2020-08-11 桂林理工大学 Method for preparing alpha hemihydrate gypsum from phosphogypsum under autoclaved condition

Also Published As

Publication number Publication date
IE42222L (en) 1976-06-18
RO67270A (en) 1980-03-15
FR2294985B1 (en) 1981-08-07
GB1474839A (en) 1977-05-25
DE2459739B2 (en) 1976-11-18
DE2459739A1 (en) 1976-07-01
LU74027A1 (en) 1976-12-31
PL109429B1 (en) 1980-05-31
BR7508349A (en) 1976-09-08
CH618146A5 (en) 1980-07-15
NL172142C (en) 1983-07-18
NL172142B (en) 1983-02-16
NL7514656A (en) 1976-06-22
DK574175A (en) 1976-06-19
SE405844B (en) 1979-01-08
AT340445B (en) 1977-12-12
DK142026B (en) 1980-08-11
DK142026C (en) 1981-01-05
FR2294985A1 (en) 1976-07-16
IE42222B1 (en) 1980-07-02
SU805943A3 (en) 1981-02-15
ATA958575A (en) 1977-04-15
SE7514272L (en) 1976-06-21

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: HOECHST A.G.

Effective date: 19861231