GB363347A - Improvements in the preparation of calcium sulphate - Google Patents

Improvements in the preparation of calcium sulphate

Info

Publication number
GB363347A
GB363347A GB2113030A GB2113030A GB363347A GB 363347 A GB363347 A GB 363347A GB 2113030 A GB2113030 A GB 2113030A GB 2113030 A GB2113030 A GB 2113030A GB 363347 A GB363347 A GB 363347A
Authority
GB
United Kingdom
Prior art keywords
excess
acid
sulphate
calcium
calcium sulphate
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
GB2113030A
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.)
IVOR PAUL LLEWELLYN
SYDNEY FRANCIS WILLIAM CRUNDAL
Peter Spence and Sons Ltd
Original Assignee
IVOR PAUL LLEWELLYN
SYDNEY FRANCIS WILLIAM CRUNDAL
Peter Spence and Sons 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 IVOR PAUL LLEWELLYN, SYDNEY FRANCIS WILLIAM CRUNDAL, Peter Spence and Sons Ltd filed Critical IVOR PAUL LLEWELLYN
Priority to GB2113030A priority Critical patent/GB363347A/en
Publication of GB363347A publication Critical patent/GB363347A/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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

Finely divided and apparently amorphous calcium sulphate is obtained by treating suitable calcium compounds other than the sulphate, for example, the mineral or precipitated carbonate, or the oxide or hydroxide with sulphuric acid, with or without sulphates such as alkali sulphates or bisulphates, in such quantity that excess of free acid remains after completion of the reaction, and of a strength insufficient to effect any solution of the calcium sulphate. Thus, sulphuric acid of specific gravity 1,75 is rapidly added to calcium carbonate in 35-40 per cent excess over that required for neutralization. Alternatively, a lower excess of oleum or R.O.V. may be added. The acid should preferably be in excess from the commencement. Excess acid may be removed by washing, followed if desired by treatment with an alkaline solution, or suitable alkaline earth, as barium hydrate.
GB2113030A 1930-07-12 1930-07-12 Improvements in the preparation of calcium sulphate Expired GB363347A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2113030A GB363347A (en) 1930-07-12 1930-07-12 Improvements in the preparation of calcium sulphate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2113030A GB363347A (en) 1930-07-12 1930-07-12 Improvements in the preparation of calcium sulphate

Publications (1)

Publication Number Publication Date
GB363347A true GB363347A (en) 1931-12-14

Family

ID=10157700

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2113030A Expired GB363347A (en) 1930-07-12 1930-07-12 Improvements in the preparation of calcium sulphate

Country Status (1)

Country Link
GB (1) GB363347A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3547581A (en) * 1967-04-07 1970-12-15 Chemie Linz Ag Process for removing fluorine and phosphate from gypsum produced in the manufacture of phosphoric acid
WO2009013728A1 (en) * 2007-07-25 2009-01-29 F.P.C. Enterprise (2008) Ltd Chemical process to produce hydrogen chloride and chloride-free compound potassium sulfate fertilizers or other metal sulfates

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3547581A (en) * 1967-04-07 1970-12-15 Chemie Linz Ag Process for removing fluorine and phosphate from gypsum produced in the manufacture of phosphoric acid
WO2009013728A1 (en) * 2007-07-25 2009-01-29 F.P.C. Enterprise (2008) Ltd Chemical process to produce hydrogen chloride and chloride-free compound potassium sulfate fertilizers or other metal sulfates
US7887776B2 (en) 2007-07-25 2011-02-15 Leonid Finkelshtein Chemical process to produce hydrogen chloride and chloride-free compound potassium sulfate fertilizers or other metal sulfates

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