BE713349A - - Google Patents

Info

Publication number
BE713349A
BE713349A BE713349DA BE713349A BE 713349 A BE713349 A BE 713349A BE 713349D A BE713349D A BE 713349DA BE 713349 A BE713349 A BE 713349A
Authority
BE
Belgium
Application number
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 filed Critical
Publication of BE713349A publication Critical patent/BE713349A/xx

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
    • C04B11/024—Ingredients added before, or during, the calcining process, e.g. calcination modifiers
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B7/00—Halogens; Halogen acids
    • C01B7/19—Fluorine; Hydrogen fluoride
    • C01B7/191—Hydrogen fluoride
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Removal Of Specific Substances (AREA)
BE713349D 1967-04-07 1968-04-05 BE713349A (xx)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT330667A AT273042B (de) 1967-04-07 1967-04-07 Verfahren zur Entfernung von Fluor und Phosphat aus Phosphorsäurefällungsgips

Publications (1)

Publication Number Publication Date
BE713349A true BE713349A (xx) 1968-10-07

Family

ID=3548508

Family Applications (1)

Application Number Title Priority Date Filing Date
BE713349D BE713349A (xx) 1967-04-07 1968-04-05

Country Status (5)

Country Link
US (1) US3547581A (xx)
AT (1) AT273042B (xx)
BE (1) BE713349A (xx)
GB (1) GB1174512A (xx)
NL (1) NL6802022A (xx)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2076260A5 (xx) * 1970-01-06 1971-10-15 Progil
US3928053A (en) * 1973-06-04 1975-12-23 Onoda Cement Co Ltd Method of improving the grade of phosphoric acid by-product gypsum to be used as an inhibitor for cement setting and its apparatus
US4060586A (en) * 1976-06-15 1977-11-29 Pennzoil Company Recovery of fluorides from gypsum
US4162170A (en) * 1977-06-29 1979-07-24 Vish Chimiko-Technologicheski Institute Method of obtaining granulated and defluorated phosphogypsum
US4312842A (en) * 1980-02-12 1982-01-26 Wilson Sr Eddie K Process of manufacture of phosphoric acid with recovery of co-products
US4415543A (en) * 1980-02-12 1983-11-15 Wilson Sr Eddie K Process for treating phospho-gypsum waste product from wet-acid process of making phosphoric acid
WO1983002266A1 (en) * 1981-12-21 1983-07-07 United States Gypsum Co Conversion of fluoroanhydrite to plaster
DE102020100260A1 (de) * 2020-01-08 2021-07-08 Thyssenkrupp Ag Integriertes Verfahren zur Herstellung von Schwefelsäureprozess-geeigneter Schwefeldioxidqualität aus Kalziumsulfat/Phosphorgips aus der Phosphorsäureproduktion
DE102020100238A1 (de) 2020-01-08 2021-07-08 Thyssenkrupp Ag Integriertes Verfahren zur kommerziellen und industriellen Verwertung von Kalziumsulfat aus der Phosphorsäureproduktion
DE102020100249A1 (de) 2020-01-08 2021-07-08 Thyssenkrupp Ag Integriertes Verfahren zur kommerziellen und industriellen Verwertung von Kalziumsulfat unter Gewinnung von Seltenen Erden aus der Phosphorsäureproduktion

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB363347A (en) * 1930-07-12 1931-12-14 Sydney Francis William Crundal Improvements in the preparation of calcium sulphate
US1969449A (en) * 1931-10-17 1934-08-07 Rumford Chemical Works Process of producing by-product calcium sulphate
US2418590A (en) * 1944-05-04 1947-04-08 United States Gypsum Co Process of making anhydrous calcium sulphate
GB1104738A (en) * 1966-12-06 1968-02-28 Coswig Chemiewerk Veb Process for the defluorination of waste gypsum

Also Published As

Publication number Publication date
NL6802022A (xx) 1968-10-08
GB1174512A (en) 1969-12-17
AT273042B (de) 1969-07-25
US3547581A (en) 1970-12-15

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