GB669519A - Production of hydrofluoric acid - Google Patents

Production of hydrofluoric acid

Info

Publication number
GB669519A
GB669519A GB22602/50A GB2260250A GB669519A GB 669519 A GB669519 A GB 669519A GB 22602/50 A GB22602/50 A GB 22602/50A GB 2260250 A GB2260250 A GB 2260250A GB 669519 A GB669519 A GB 669519A
Authority
GB
United Kingdom
Prior art keywords
hydrofluoric acid
acid
ammonium
ammonium fluoride
sulphuric acid
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
GB22602/50A
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.)
American Zinc Lead and Smelting Co
Original Assignee
American Zinc Lead and Smelting Co
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 American Zinc Lead and Smelting Co filed Critical American Zinc Lead and Smelting Co
Publication of GB669519A publication Critical patent/GB669519A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C01B7/193—Preparation from silicon tetrafluoride, fluosilicic acid or fluosilicates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Removal Of Specific Substances (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)

Abstract

Magnesium silicofluoride, obtained, for example, by the process of Specification 669,518, is dissolved or suspended in an aqueous medium, and reacted with ammonium hydroxide, and the ammonium fluoride so formed is separated and distilled with sulphuric acid to produce hydrofluoric acid. The magnesium hydroxide and silica mixture separated from the ammonium fluoride may be used as a fertilizer material, or treated with carbonated water or mineral acid to dissolve the former. Prior to treatment with sulphuric acid, the ammonium fluoride solution is concentrated, or the salt may be salted out by ammonia. Alternatively, the solution may be evaporated to diquess or crystallized. The hydrofluoric acid may be dehydrated by concentrated sulphuric acid. The ammonia used in the process may be recovered as such or as ammonium sulphate.
GB22602/50A 1949-10-28 1950-09-14 Production of hydrofluoric acid Expired GB669519A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US289677XA 1949-10-28 1949-10-28

Publications (1)

Publication Number Publication Date
GB669519A true GB669519A (en) 1952-04-02

Family

ID=21846492

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22602/50A Expired GB669519A (en) 1949-10-28 1950-09-14 Production of hydrofluoric acid

Country Status (4)

Country Link
BE (1) BE498275A (en)
CH (1) CH289677A (en)
DE (1) DE877748C (en)
GB (1) GB669519A (en)

Also Published As

Publication number Publication date
BE498275A (en)
DE877748C (en) 1953-05-26
CH289677A (en) 1953-03-31

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