GB561206A - Improvements in or relating to the production of gypsum from anhydrite - Google Patents

Improvements in or relating to the production of gypsum from anhydrite

Info

Publication number
GB561206A
GB561206A GB970142A GB970142A GB561206A GB 561206 A GB561206 A GB 561206A GB 970142 A GB970142 A GB 970142A GB 970142 A GB970142 A GB 970142A GB 561206 A GB561206 A GB 561206A
Authority
GB
United Kingdom
Prior art keywords
gypsum
production
anhydrite
crystals
relating
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
GB970142A
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.)
FRANCIS ROBERT HIMSWORTH
Imperial Chemical Industries Ltd
Original Assignee
FRANCIS ROBERT HIMSWORTH
Imperial Chemical Industries Ltd
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 FRANCIS ROBERT HIMSWORTH, Imperial Chemical Industries Ltd filed Critical FRANCIS ROBERT HIMSWORTH
Priority to GB970142A priority Critical patent/GB561206A/en
Publication of GB561206A publication Critical patent/GB561206A/en
Expired 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
    • C04B11/06—Calcium sulfate cements starting from anhydrite

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)
  • Catalysts (AREA)

Abstract

561,206. Gypsum. HIMSWORTH, F.R., LEFEBURE, V., and IMPERIAL CHEMICAL INDUSTRIES, Ltd. July 13, 1942, No. 9701. [Class 1 (iii)] Gypsum in a form suitable for conversion to plaster of Paris is produced by hydrating ground anhydrite with sufficient water to prevent setting and in the presence of seed gypsum crystals of dimensions not less than 100Á by 20Á by 20Á. Suitable crystals are those obtained in the production of phosphoric acid by treatment of phosphate rock with sulphuric acid, or from a previous hydration operation. The hydration process may be carried out in the presence of a catalyst comprising potassium and aluminium sulphates as described in Specification 561,205.
GB970142A 1942-07-13 1942-07-13 Improvements in or relating to the production of gypsum from anhydrite Expired GB561206A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB970142A GB561206A (en) 1942-07-13 1942-07-13 Improvements in or relating to the production of gypsum from anhydrite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB970142A GB561206A (en) 1942-07-13 1942-07-13 Improvements in or relating to the production of gypsum from anhydrite

Publications (1)

Publication Number Publication Date
GB561206A true GB561206A (en) 1944-05-10

Family

ID=9877092

Family Applications (1)

Application Number Title Priority Date Filing Date
GB970142A Expired GB561206A (en) 1942-07-13 1942-07-13 Improvements in or relating to the production of gypsum from anhydrite

Country Status (1)

Country Link
GB (1) GB561206A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983002110A1 (en) * 1981-12-14 1983-06-23 United States Gypsum Co Process for rapid conversion of fluoroanhydrite to gypsum
EP1431256A2 (en) * 2002-12-18 2004-06-23 Forschungszentrum Karlsruhe GmbH Process for hydrating anhydrite

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983002110A1 (en) * 1981-12-14 1983-06-23 United States Gypsum Co Process for rapid conversion of fluoroanhydrite to gypsum
US4402922A (en) * 1981-12-14 1983-09-06 United States Gypsum Company Process for rapid conversion of fluoroanhydrite to gypsum
AU570624B2 (en) * 1981-12-14 1988-03-24 United States Gypsum Company Process for rapid conversion of fluoroanhydrite to gypsum
EP1431256A2 (en) * 2002-12-18 2004-06-23 Forschungszentrum Karlsruhe GmbH Process for hydrating anhydrite
EP1431256A3 (en) * 2002-12-18 2006-04-26 Forschungszentrum Karlsruhe GmbH Process for hydrating anhydrite

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