DK574175A - PROCEDURE FOR THE PREPARATION OF CALCIUM SULFATALFA SEMIHYDRATE AND FACILITIES FOR THE PERFORMANCE OF THE PROCEDURE - Google Patents

PROCEDURE FOR THE PREPARATION OF CALCIUM SULFATALFA SEMIHYDRATE AND FACILITIES FOR THE PERFORMANCE OF THE PROCEDURE

Info

Publication number
DK574175A
DK574175A DK574175A DK574175A DK574175A DK 574175 A DK574175 A DK 574175A DK 574175 A DK574175 A DK 574175A DK 574175 A DK574175 A DK 574175A DK 574175 A DK574175 A DK 574175A
Authority
DK
Denmark
Prior art keywords
procedure
sulfatalfa
semihydrate
facilities
calcium
Prior art date
Application number
DK574175A
Other languages
Danish (da)
Other versions
DK142026B (en
DK142026C (en
Inventor
G Reichert
K H Stendenbach
L Strie
Tiedemann
Original Assignee
Hoechst Ag
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 by Hoechst Ag filed Critical Hoechst Ag
Publication of DK574175A publication Critical patent/DK574175A/en
Publication of DK142026B publication Critical patent/DK142026B/en
Application granted granted Critical
Publication of DK142026C publication Critical patent/DK142026C/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)
DK574175A 1974-12-18 1975-12-17 PROCEDURE FOR PREPARING CALCIUM SULPHATE-ALFA SEMI-HYDRATE AND PLANT FOR IMPLEMENTATION OF THE PROCEDURE DK142026C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2459739 1974-12-18
DE19742459739 DE2459739C3 (en) 1974-12-18 Process and plant for the production of calcium sulfate alpha hemihydrate

Publications (3)

Publication Number Publication Date
DK574175A true DK574175A (en) 1976-06-19
DK142026B DK142026B (en) 1980-08-11
DK142026C DK142026C (en) 1981-01-05

Family

ID=5933662

Family Applications (1)

Application Number Title Priority Date Filing Date
DK574175A DK142026C (en) 1974-12-18 1975-12-17 PROCEDURE FOR PREPARING CALCIUM SULPHATE-ALFA SEMI-HYDRATE AND PLANT FOR IMPLEMENTATION OF THE PROCEDURE

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
SE405844B (en) 1979-01-08
AT340445B (en) 1977-12-12
DK142026B (en) 1980-08-11
DK142026C (en) 1981-01-05
BE836714A (en) 1976-06-17
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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