GB1174512A - Process for Purifying Gypsum. - Google Patents

Process for Purifying Gypsum.

Info

Publication number
GB1174512A
GB1174512A GB04366/68A GB1436668A GB1174512A GB 1174512 A GB1174512 A GB 1174512A GB 04366/68 A GB04366/68 A GB 04366/68A GB 1436668 A GB1436668 A GB 1436668A GB 1174512 A GB1174512 A GB 1174512A
Authority
GB
United Kingdom
Prior art keywords
purifying gypsum
gypsum
purifying
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.)
Expired
Application number
GB04366/68A
Other languages
English (en)
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.)
Osterreichische Stickstoffwerke AG
Patheon Austria GmbH and Co KG
Original Assignee
Chemie Linz AG
Osterreichische 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 Chemie Linz AG, Osterreichische Stickstoffwerke AG filed Critical Chemie Linz AG
Publication of GB1174512A publication Critical patent/GB1174512A/en
Expired legal-status Critical Current

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)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Removal Of Specific Substances (AREA)
GB04366/68A 1967-04-07 1968-03-25 Process for Purifying Gypsum. Expired GB1174512A (en)

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
GB1174512A true GB1174512A (en) 1969-12-17

Family

ID=3548508

Family Applications (1)

Application Number Title Priority Date Filing Date
GB04366/68A Expired GB1174512A (en) 1967-04-07 1968-03-25 Process for Purifying Gypsum.

Country Status (5)

Country Link
US (1) US3547581A (US20030204162A1-20031030-M00001.png)
AT (1) AT273042B (US20030204162A1-20031030-M00001.png)
BE (1) BE713349A (US20030204162A1-20031030-M00001.png)
GB (1) GB1174512A (US20030204162A1-20031030-M00001.png)
NL (1) NL6802022A (US20030204162A1-20031030-M00001.png)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983002266A1 (en) * 1981-12-21 1983-07-07 United States Gypsum Co Conversion of fluoroanhydrite to plaster

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2076260A5 (US20030204162A1-20031030-M00001.png) * 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
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
US4312842A (en) * 1980-02-12 1982-01-26 Wilson Sr Eddie K Process of manufacture of phosphoric acid with recovery of co-products
DE102020100260A1 (de) 2020-01-08 2021-07-08 Thyssenkrupp Ag Integriertes Verfahren zur Herstellung von Schwefelsäureprozess-geeigneter Schwefeldioxidqualität aus Kalziumsulfat/Phosphorgips 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
DE102020100238A1 (de) 2020-01-08 2021-07-08 Thyssenkrupp Ag Integriertes Verfahren zur kommerziellen und industriellen Verwertung von Kalziumsulfat 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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983002266A1 (en) * 1981-12-21 1983-07-07 United States Gypsum Co Conversion of fluoroanhydrite to plaster

Also Published As

Publication number Publication date
NL6802022A (US20030204162A1-20031030-M00001.png) 1968-10-08
US3547581A (en) 1970-12-15
AT273042B (de) 1969-07-25
BE713349A (US20030204162A1-20031030-M00001.png) 1968-10-07

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Legal Events

Date Code Title Description
414F Notice of opposition given (sect. 14/1949)
414A Case decided by the comptroller ** specification amended (sect. 14/1949)
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees