GB447246A - Improvements in the manufacture and production of magnesia poor in lime from dolomite - Google Patents

Improvements in the manufacture and production of magnesia poor in lime from dolomite

Info

Publication number
GB447246A
GB447246A GB3242535A GB3242535A GB447246A GB 447246 A GB447246 A GB 447246A GB 3242535 A GB3242535 A GB 3242535A GB 3242535 A GB3242535 A GB 3242535A GB 447246 A GB447246 A GB 447246A
Authority
GB
United Kingdom
Prior art keywords
dolomite
calcium carbonate
magnesium hydroxide
calcined
carbon dioxide
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
GB3242535A
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.)
Kloeckner Werke AG
Original Assignee
Kloeckner Werke 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 Kloeckner Werke AG filed Critical Kloeckner Werke AG
Priority to GB3242535A priority Critical patent/GB447246A/en
Publication of GB447246A publication Critical patent/GB447246A/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
    • C01F5/00—Compounds of magnesium
    • C01F5/14—Magnesium hydroxide
    • C01F5/22—Magnesium hydroxide from magnesium compounds with alkali hydroxides or alkaline- earth oxides or hydroxides

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

Magnesium hydroxide is obtained by the reaction of calcined and slaked dolomite with magnesium chloride solution in the presence of ammonia or ammonium salts. From the resulting calcium chloride solution containing ammonia, &c., calcium carbonate may be obtained by treatment with more calcined and slaked dolomite and carbon dioxide with regeneration of the magnesium chloride containing ammonia &c. The reactions are preferably carried out below 20 DEG C., and the carbon dioxide used in obtaining calcium carbonate is preferably that obtained by calcination of the crude dolomite. In burning the latter, material of a grain size of 5--25 mm. may be used, and the burnt material, after slaking to a dry powder, be separated into two fractions of about equal amounts by sifting, it may be through a 100 mesh sieve. The fine fraction is used in the preparation of the magnesium hydroxide, and the coarse fraction, after comminution if desired, in the preparation of the calcium carbonate. If desired, substances such as iron oxides or soapstone may be added during the precipitation of the magnesium hydroxide, to render it suitable for conversion into "sintermagnesite."
GB3242535A 1935-11-22 1935-11-22 Improvements in the manufacture and production of magnesia poor in lime from dolomite Expired GB447246A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3242535A GB447246A (en) 1935-11-22 1935-11-22 Improvements in the manufacture and production of magnesia poor in lime from dolomite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3242535A GB447246A (en) 1935-11-22 1935-11-22 Improvements in the manufacture and production of magnesia poor in lime from dolomite

Publications (1)

Publication Number Publication Date
GB447246A true GB447246A (en) 1936-05-14

Family

ID=10338405

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3242535A Expired GB447246A (en) 1935-11-22 1935-11-22 Improvements in the manufacture and production of magnesia poor in lime from dolomite

Country Status (1)

Country Link
GB (1) GB447246A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2449293A (en) * 1944-05-02 1948-09-14 Marine Magnesium Products Corp Process for production of magnesium compounds

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2449293A (en) * 1944-05-02 1948-09-14 Marine Magnesium Products Corp Process for production of magnesium compounds

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