GB1530451A - Production of gypsum from by-product calcium sulphate - Google Patents

Production of gypsum from by-product calcium sulphate

Info

Publication number
GB1530451A
GB1530451A GB284975A GB284975A GB1530451A GB 1530451 A GB1530451 A GB 1530451A GB 284975 A GB284975 A GB 284975A GB 284975 A GB284975 A GB 284975A GB 1530451 A GB1530451 A GB 1530451A
Authority
GB
United Kingdom
Prior art keywords
calcium sulphate
gypsum
production
hemihydrate
product calcium
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
GB284975A
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.)
BPB Ltd
Original Assignee
BPB Industries PLC
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 BPB Industries PLC filed Critical BPB Industries PLC
Priority to GB284975A priority Critical patent/GB1530451A/en
Priority to SE7600595A priority patent/SE414761B/en
Priority to DK24576A priority patent/DK141697B/en
Publication of GB1530451A publication Critical patent/GB1530451A/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
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
    • C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
    • 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)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

1530451 Hydration of calcium sulphate hemihydrate BPB INDUSTRIES Ltd 22 Jan 1976 [22 Jan 1975] 2849/75 Heading C1A Calcium sulphate dihydrate is obtained by hydration of the α-hemihydrate by reaction in water with the addition of a volatile nitrogenous base. Typical bases include ammonia, preferably in solution as ammonium hydroxide, and ammonium carbonate. The product may be converted to the #-hemihydrate by conventional calcination.
GB284975A 1975-01-22 1975-01-22 Production of gypsum from by-product calcium sulphate Expired GB1530451A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB284975A GB1530451A (en) 1975-01-22 1975-01-22 Production of gypsum from by-product calcium sulphate
SE7600595A SE414761B (en) 1975-01-22 1976-01-21 PROCEDURE FOR HYDRATIZATION OF BY-PRODUCT RECOVERED CALCIUM SULPHATE-ALFA HEMI-HYDRATED WITH THE WATER
DK24576A DK141697B (en) 1975-01-22 1976-01-22 Process for hydrating calcium sulfate alpha hemihydrate with water.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB284975A GB1530451A (en) 1975-01-22 1975-01-22 Production of gypsum from by-product calcium sulphate

Publications (1)

Publication Number Publication Date
GB1530451A true GB1530451A (en) 1978-11-01

Family

ID=9747127

Family Applications (1)

Application Number Title Priority Date Filing Date
GB284975A Expired GB1530451A (en) 1975-01-22 1975-01-22 Production of gypsum from by-product calcium sulphate

Country Status (3)

Country Link
DK (1) DK141697B (en)
GB (1) GB1530451A (en)
SE (1) SE414761B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0334292A1 (en) * 1988-03-24 1989-09-27 Lafarge Coppee S.A. Process for the preparation of calcium sulfate dihydrate with elongated shaped crystals provided with an imposed length and shape factor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0334292A1 (en) * 1988-03-24 1989-09-27 Lafarge Coppee S.A. Process for the preparation of calcium sulfate dihydrate with elongated shaped crystals provided with an imposed length and shape factor
FR2629069A1 (en) * 1988-03-24 1989-09-29 Lafarge Sa Platres PROCESS FOR THE PREPARATION OF CALCIUM SULFATE HAVING A LONGILINE CRYSTALLINE STRUCTURE WITH A MASTERIZED LENGTH AND FORM FACTOR
WO1989009187A1 (en) * 1988-03-24 1989-10-05 Platres Lafarge S.A. Process for preparing calcium sulphate with an elongated crystalline structure, the length and shape factor of which are controlled

Also Published As

Publication number Publication date
SE7600595L (en) 1976-07-23
DK141697B (en) 1980-05-27
DK24576A (en) 1976-07-23
DK141697C (en) 1980-10-20
SE414761B (en) 1980-08-18

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19960121