ZA71309B - Improvements in or relating to the defluorination of gypsum - Google Patents

Improvements in or relating to the defluorination of gypsum

Info

Publication number
ZA71309B
ZA71309B ZA710309A ZA71309A ZA71309B ZA 71309 B ZA71309 B ZA 71309B ZA 710309 A ZA710309 A ZA 710309A ZA 71309 A ZA71309 A ZA 71309A ZA 71309 B ZA71309 B ZA 71309B
Authority
ZA
South Africa
Prior art keywords
defluorination
gypsum
relating
Prior art date
Application number
ZA710309A
Other languages
English (en)
Inventor
W Binder
K Bogati
H Stich
W Gauster
J Hutter
Original Assignee
Oesterr Stickstoffwerke 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
Application filed by Oesterr Stickstoffwerke Ag filed Critical Oesterr Stickstoffwerke Ag
Publication of ZA71309B publication Critical patent/ZA71309B/xx

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
    • C01F11/468—Purification of calcium sulfates
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/08—Compounds containing halogen
    • C01B33/10—Compounds containing silicon, fluorine, and other elements
    • C01B33/103—Fluosilicic acid; Salts thereof
    • 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
    • C04B11/024—Ingredients added before, or during, the calcining process, e.g. calcination modifiers
    • 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
    • C04B11/26—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
ZA710309A 1970-02-25 1971-01-18 Improvements in or relating to the defluorination of gypsum ZA71309B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT170170A AT297041B (de) 1970-02-25 1970-02-25 Verfahren zur Verminderung des Fluorgehaltes von Phosphorsäureabfallgips
DE19702009647 DE2009647A1 (de) 1970-02-25 1970-03-02

Publications (1)

Publication Number Publication Date
ZA71309B true ZA71309B (en) 1972-08-30

Family

ID=25596588

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA710309A ZA71309B (en) 1970-02-25 1971-01-18 Improvements in or relating to the defluorination of gypsum

Country Status (7)

Country Link
AT (1) AT297041B (de)
BE (1) BE763473A (de)
BR (1) BR7101106D0 (de)
DE (1) DE2009647A1 (de)
GB (1) GB1346933A (de)
NL (1) NL7018582A (de)
ZA (1) ZA71309B (de)

Also Published As

Publication number Publication date
AT297041B (de) 1972-03-10
BE763473A (fr) 1971-08-25
DE2009647A1 (de) 1971-12-02
BR7101106D0 (pt) 1973-06-14
NL7018582A (de) 1971-08-27
GB1346933A (en) 1974-02-13

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