CH510583A - Process for manufacturing a plaster formed from semi-hydrated calcium sulphate, apparatus for carrying out the process - Google Patents

Process for manufacturing a plaster formed from semi-hydrated calcium sulphate, apparatus for carrying out the process

Info

Publication number
CH510583A
CH510583A CH978568A CH978568A CH510583A CH 510583 A CH510583 A CH 510583A CH 978568 A CH978568 A CH 978568A CH 978568 A CH978568 A CH 978568A CH 510583 A CH510583 A CH 510583A
Authority
CH
Switzerland
Prior art keywords
semi
carrying
manufacturing
calcium sulphate
hydrated calcium
Prior art date
Application number
CH978568A
Other languages
French (fr)
Inventor
Henri Pinault Rene
Bourgeois Georges Le
Original Assignee
Ets Poliet & Chausson
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 Ets Poliet & Chausson filed Critical Ets Poliet & Chausson
Publication of CH510583A publication Critical patent/CH510583A/en

Links

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/0018—Evaporation of components of the mixture to be separated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/0036—Crystallisation on to a bed of product crystals; Seeding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/005—Selection of auxiliary, e.g. for control of crystallisation nuclei, of crystal growth, of adherence to walls; Arrangements for introduction thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/0059—General arrangements of crystallisation plant, e.g. flow sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J16/00—Chemical processes in general for reacting liquids with non- particulate solids, e.g. sheet material; Apparatus specially adapted therefor
    • 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)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Geology (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Catalysts (AREA)
CH978568A 1967-08-25 1968-07-01 Process for manufacturing a plaster formed from semi-hydrated calcium sulphate, apparatus for carrying out the process CH510583A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR119019 1967-08-25

Publications (1)

Publication Number Publication Date
CH510583A true CH510583A (en) 1971-07-31

Family

ID=8637363

Family Applications (1)

Application Number Title Priority Date Filing Date
CH978568A CH510583A (en) 1967-08-25 1968-07-01 Process for manufacturing a plaster formed from semi-hydrated calcium sulphate, apparatus for carrying out the process

Country Status (8)

Country Link
BE (1) BE717260A (en)
CH (1) CH510583A (en)
DE (1) DE1767937C3 (en)
ES (1) ES356722A1 (en)
FR (1) FR1548410A (en)
GB (1) GB1246664A (en)
LU (1) LU56676A1 (en)
NL (1) NL6812084A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0876996B1 (en) * 1997-05-10 2001-12-19 SICOWA Verfahrenstechnik für Baustoffe GmbH & Co. KG Process for the preparation of calcium sulfate-alpha hemi-hydrate
US8793897B2 (en) * 2010-08-11 2014-08-05 Grenzebach Bsh Gmbh Process and device for stabilising, cooling and dehumidifying gypsum plaster
CN110498626B (en) * 2019-09-09 2022-04-05 太原科技大学 Production method of alpha-type semi-hydrated gypsum

Also Published As

Publication number Publication date
BE717260A (en) 1968-12-02
ES356722A1 (en) 1970-02-16
FR1548410A (en) 1968-12-06
GB1246664A (en) 1971-09-15
DE1767937B2 (en) 1973-08-02
DE1767937C3 (en) 1974-03-07
DE1767937A1 (en) 1972-03-09
LU56676A1 (en) 1968-11-18
NL6812084A (en) 1969-02-27

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Legal Events

Date Code Title Description
PL Patent ceased