GB779804A - Improvements in method for generating silicon tetrafluoride - Google Patents

Improvements in method for generating silicon tetrafluoride

Info

Publication number
GB779804A
GB779804A GB24156/55A GB2415655A GB779804A GB 779804 A GB779804 A GB 779804A GB 24156/55 A GB24156/55 A GB 24156/55A GB 2415655 A GB2415655 A GB 2415655A GB 779804 A GB779804 A GB 779804A
Authority
GB
United Kingdom
Prior art keywords
boiling point
glycerine
fed
heated
inlet
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
GB24156/55A
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.)
Columbian Carbon Co
Original Assignee
Columbian Carbon 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 Columbian Carbon Co filed Critical Columbian Carbon Co
Publication of GB779804A publication Critical patent/GB779804A/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
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/08—Compounds containing halogen

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Silicon Compounds (AREA)

Abstract

<PICT:0779804/III/1> Silicon tetrafluoride is prepared by reacting hydrogen fluoride with silicon dioxide suspended in a hygroscopic organic liquid solvent for HF having a boiling point not less than 350 DEG F., while maintaining the suspension at a temperature in excess of the boiling point of water but not exceeding the boiling point of the solvent. Solvents may be glycerine, or propylene, or ethylene glycol, and reaction temperature 250-350 DEG F. Glycerine is fed through inlet 7 to reaction vessel 1, where it is stirred by agitator 2 and heated by electric or steam heating jacket 6. Sand is continuously or periodically run in from bin 9 to form a suspension containing excess sand and while HF is fed through inlet 12 and mercury pool 15. The pressure may vary from 2 inches Hg below, to 4 inches water above atmospheric. The SiF4 leaves at 16 and may be passed to oxidizing chambers 18, where is is heated in the presence of the water vapour formed to yield silicon dioxide, which is deposited in separator 20, and HF, which is recycled by pump 23 to vessel 1.
GB24156/55A 1955-03-30 1955-08-22 Improvements in method for generating silicon tetrafluoride Expired GB779804A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US779804XA 1955-03-30 1955-03-30

Publications (1)

Publication Number Publication Date
GB779804A true GB779804A (en) 1957-07-24

Family

ID=22141137

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24156/55A Expired GB779804A (en) 1955-03-30 1955-08-22 Improvements in method for generating silicon tetrafluoride

Country Status (1)

Country Link
GB (1) GB779804A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4457901A (en) * 1981-08-06 1984-07-03 Central Glass Company, Limited Method of refining silicon tetrafluoride gas

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4457901A (en) * 1981-08-06 1984-07-03 Central Glass Company, Limited Method of refining silicon tetrafluoride gas

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