FR2294985A1 - Procede et appareillage pour la preparation d'a-hemilhydrate de sulfate de calcium - Google Patents

Procede et appareillage pour la preparation d'a-hemilhydrate de sulfate de calcium

Info

Publication number
FR2294985A1
FR2294985A1 FR7538905A FR7538905A FR2294985A1 FR 2294985 A1 FR2294985 A1 FR 2294985A1 FR 7538905 A FR7538905 A FR 7538905A FR 7538905 A FR7538905 A FR 7538905A FR 2294985 A1 FR2294985 A1 FR 2294985A1
Authority
FR
France
Prior art keywords
hemilhydrate
preparation
calcium sulphate
sulphate
calcium
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
FR7538905A
Other languages
English (en)
Other versions
FR2294985B1 (fr
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.)
Hoechst AG
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/de
Application filed by Hoechst AG filed Critical Hoechst AG
Publication of FR2294985A1 publication Critical patent/FR2294985A1/fr
Application granted granted Critical
Publication of FR2294985B1 publication Critical patent/FR2294985B1/fr
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
    • 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)
FR7538905A 1974-12-18 1975-12-18 Procede et appareillage pour la preparation d'a-hemilhydrate de sulfate de calcium Granted FR2294985A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742459739 DE2459739C3 (de) 1974-12-18 Verfahren und Anlage zur Herstellung von Calciumsulfat-alpha-Halbhydrat

Publications (2)

Publication Number Publication Date
FR2294985A1 true FR2294985A1 (fr) 1976-07-16
FR2294985B1 FR2294985B1 (fr) 1981-08-07

Family

ID=5933662

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7538905A Granted FR2294985A1 (fr) 1974-12-18 1975-12-18 Procede et appareillage pour la preparation d'a-hemilhydrate de sulfate de calcium

Country Status (14)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0085382A1 (fr) * 1982-02-01 1983-08-10 Quante, Heinrich Installation pour la préparation de alpha-sulfate de calcium demihydrate
CN111517355A (zh) * 2020-05-05 2020-08-11 桂林理工大学 一种蒸压条件下磷石膏制备α半水石膏的方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0085382A1 (fr) * 1982-02-01 1983-08-10 Quante, Heinrich Installation pour la préparation de alpha-sulfate de calcium demihydrate
CN111517355A (zh) * 2020-05-05 2020-08-11 桂林理工大学 一种蒸压条件下磷石膏制备α半水石膏的方法

Also Published As

Publication number Publication date
DK142026C (da) 1981-01-05
RO67270A (fr) 1980-03-15
ATA958575A (de) 1977-04-15
IE42222B1 (en) 1980-07-02
NL172142C (nl) 1983-07-18
NL7514656A (nl) 1976-06-22
GB1474839A (en) 1977-05-25
SE7514272L (sv) 1976-06-21
IE42222L (en) 1976-06-18
DE2459739A1 (de) 1976-07-01
FR2294985B1 (fr) 1981-08-07
PL109429B1 (en) 1980-05-31
AT340445B (de) 1977-12-12
CH618146A5 (en) 1980-07-15
BR7508349A (pt) 1976-09-08
DE2459739B2 (de) 1976-11-18
DK574175A (da) 1976-06-19
BE836714A (fr) 1976-06-17
SE405844B (sv) 1979-01-08
NL172142B (nl) 1983-02-16
SU805943A3 (ru) 1981-02-15
DK142026B (da) 1980-08-11
LU74027A1 (fr) 1976-12-31

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Legal Events

Date Code Title Description
ST Notification of lapse