CA979179A - Process for converting silicon and fluorine-containing waste gases into silicon dioxide and hydrogen fluoride - Google Patents

Process for converting silicon and fluorine-containing waste gases into silicon dioxide and hydrogen fluoride

Info

Publication number
CA979179A
CA979179A CA152,675A CA152675A CA979179A CA 979179 A CA979179 A CA 979179A CA 152675 A CA152675 A CA 152675A CA 979179 A CA979179 A CA 979179A
Authority
CA
Canada
Prior art keywords
silicon
fluorine
hydrogen fluoride
containing waste
waste gases
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
CA152,675A
Other versions
CA152675S (en
Inventor
Gosta L. Flemmert
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of CA979179A publication Critical patent/CA979179A/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
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/113—Silicon oxides; Hydrates thereof
    • C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
    • C01B33/18—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof
    • C01B33/181—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof by a dry process
    • C01B33/183—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof by a dry process by oxidation or hydrolysis in the vapour phase of silicon compounds such as halides, trichlorosilane, monosilane
    • C01B33/184—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof by a dry process by oxidation or hydrolysis in the vapour phase of silicon compounds such as halides, trichlorosilane, monosilane by hydrolysis of tetrafluoride
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Treating Waste Gases (AREA)
  • Silicon Compounds (AREA)
CA152,675A 1971-10-28 1972-09-27 Process for converting silicon and fluorine-containing waste gases into silicon dioxide and hydrogen fluoride Expired CA979179A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US19346771A 1971-10-28 1971-10-28

Publications (1)

Publication Number Publication Date
CA979179A true CA979179A (en) 1975-12-09

Family

ID=22713763

Family Applications (1)

Application Number Title Priority Date Filing Date
CA152,675A Expired CA979179A (en) 1971-10-28 1972-09-27 Process for converting silicon and fluorine-containing waste gases into silicon dioxide and hydrogen fluoride

Country Status (8)

Country Link
BE (1) BE790472A (en)
CA (1) CA979179A (en)
DE (1) DE2251787C2 (en)
FR (1) FR2158314B1 (en)
GB (1) GB1413333A (en)
IT (1) IT975395B (en)
NL (1) NL170402C (en)
SE (1) SE396060B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3206766A1 (en) * 1982-02-25 1983-09-01 Siemens AG, 1000 Berlin und 8000 München METHOD FOR PRODUCING SILICON USED FOR SOLAR CELLS
ES2300201B1 (en) * 2006-11-15 2009-06-05 Casals Cardona Industrial, S.A. RESIDUAL GASES CLEANING PROCEDURE CONTAINING METAL MERCAPTAN, SOLID PARTICLES AND SILICON TETRAFLUORIDE, WITH PRODUCTION OF A REVALUABLE EFFLUENT.
CN107601434A (en) * 2017-11-07 2018-01-19 衢州市鼎盛化工科技有限公司 A kind of method and apparatus that hydrogen fluoride is prepared by fluosilicic acid
CN108816029B (en) * 2018-08-02 2023-10-13 浙江中宁硅业有限公司 Method for treating silicon tetrafluoride gas by using low-concentration HF acid and treatment equipment thereof
CN112551531A (en) * 2020-11-24 2021-03-26 浙江巨化技术中心有限公司 Method for coproducing hydrogen fluoride, white carbon black and potassium sulfate
US11891344B2 (en) 2022-04-20 2024-02-06 Chtem Limited Methods for graded utilization of fluorine and silicon resources in phosphate ores
CN114988920B (en) * 2022-04-20 2023-01-13 贵州新东浩化工材料科技有限公司 Method for utilizing fluorine and silicon resources in phosphate ore in grading manner
CN114920202B (en) * 2022-05-31 2023-06-06 江西天行化工有限责任公司 Preparation method of hydrogen fluoride

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2819151A (en) * 1954-03-02 1958-01-07 Flemmert Gosta Lennart Process for burning silicon fluorides to form silica
US2833628A (en) * 1954-06-09 1958-05-06 Grace W R & Co Manufacture of silicon tetrafluoride
NL139012B (en) * 1961-10-02 1973-06-15 Stauffer Chemical Co PROCEDURE FOR THE WINNING OF THE FLUOR IN THE FORM OF CONCENTRATED HYDROGEN FLUORIDE.

Also Published As

Publication number Publication date
GB1413333A (en) 1975-11-12
NL170402C (en) 1982-11-01
SE396060B (en) 1977-09-05
NL7214517A (en) 1973-05-02
NL170402B (en) 1982-06-01
FR2158314A1 (en) 1973-06-15
FR2158314B1 (en) 1977-12-23
DE2251787A1 (en) 1973-05-10
IT975395B (en) 1974-07-20
BE790472A (en) 1973-02-15
DE2251787C2 (en) 1982-08-26

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