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 languages
English (en)
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 (de)
CA (1) CA979179A (de)
DE (1) DE2251787C2 (de)
FR (1) FR2158314B1 (de)
GB (1) GB1413333A (de)
IT (1) IT975395B (de)
NL (1) NL170402C (de)
SE (1) SE396060B (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3206766A1 (de) * 1982-02-25 1983-09-01 Siemens AG, 1000 Berlin und 8000 München Verfahren zum herstellen von fuer solarzellen verwendbarem silizium
ES2300201B1 (es) * 2006-11-15 2009-06-05 Casals Cardona Industrial, S.A. Procedimiento de depuracion de gases residuales que contienen metil mercaptano, particulas solidas y tetrafluoruro de silicio, con produccion de un efluente revalorizable.
CN107601434A (zh) * 2017-11-07 2018-01-19 衢州市鼎盛化工科技有限公司 一种由氟硅酸制备氟化氢的方法及设备
CN108816029B (zh) * 2018-08-02 2023-10-13 浙江中宁硅业有限公司 一种利用低浓度hf酸处理四氟化硅气体的方法及其处理设备
CN112551531A (zh) * 2020-11-24 2021-03-26 浙江巨化技术中心有限公司 一种联产氟化氢、白炭黑和硫酸钾的方法
CN114988920B (zh) * 2022-04-20 2023-01-13 贵州新东浩化工材料科技有限公司 一种分级利用磷矿石中氟、硅资源的方法
US11891344B2 (en) 2022-04-20 2024-02-06 Chtem Limited Methods for graded utilization of fluorine and silicon resources in phosphate ores
CN114920202B (zh) * 2022-05-31 2023-06-06 江西天行化工有限责任公司 一种氟化氢制备方法
CN116425167B (zh) * 2023-04-19 2024-07-16 贵州瓮福蓝天氟化工股份有限公司 一种氟硅酸溶液的浓缩方法及***
CN117509548B (zh) * 2023-12-04 2024-07-05 云南氟磷电子科技有限公司 一种氟硅酸制备氢氟酸联产白炭黑的方法

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 (nl) * 1961-10-02 1973-06-15 Stauffer Chemical Co Werkwijze voor het winnen van het fluor in de vorm van geconcentreerd waterstoffluoride.

Also Published As

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

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