GB225187A - Improved manufacture of hafnium and zirconium compounds - Google Patents

Improved manufacture of hafnium and zirconium compounds

Info

Publication number
GB225187A
GB225187A GB24125/24A GB2412524A GB225187A GB 225187 A GB225187 A GB 225187A GB 24125/24 A GB24125/24 A GB 24125/24A GB 2412524 A GB2412524 A GB 2412524A GB 225187 A GB225187 A GB 225187A
Authority
GB
United Kingdom
Prior art keywords
hafnium
solution
phosphates
zirconium
compounds
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
GB24125/24A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB225187A publication Critical patent/GB225187A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G25/00—Compounds of zirconium
    • C01G25/02—Oxides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)

Abstract

Phosphates, phosphites, arsenates, arsenites, antimonates, or antimonites of hafnium and zirconium are converted into soluble p compounds by treatment with a medium containing free hydrofluoric acid. The mixed phosphates may be obtained by treating a hafnium ore with carbon and chlorine or with a flux such as an alkali bisulphate, and adding phosphoric acid to the solution. The phosphates of hafnium and zirconium are then separated as a precipitate free from compounds of the other metals. The mixed phosphates are treated with a liquid containing free hydrofluoric acid, for instance a bifluoride solution, and the solution is then poured into an alkaline solution such as ammonia solution to precipitate the oxides, from which the double fluorides may be prepared. If ammonia has been used as a precipitant it is advisable to make the double ammonium fluorides. The Specification as open to inspection under Sect. 91 (3) (a) refers to the conversion of the compounds of hafnium or zirconium by the process described. The subject-matter does not appear in the Specification as accepted.
GB24125/24A 1923-11-15 1924-10-11 Improved manufacture of hafnium and zirconium compounds Expired GB225187A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL225187X 1923-11-15

Publications (1)

Publication Number Publication Date
GB225187A true GB225187A (en) 1925-05-07

Family

ID=19779607

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24125/24A Expired GB225187A (en) 1923-11-15 1924-10-11 Improved manufacture of hafnium and zirconium compounds

Country Status (1)

Country Link
GB (1) GB225187A (en)

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