GB803756A - Process for the preparation of silicon tetrafluoride - Google Patents

Process for the preparation of silicon tetrafluoride

Info

Publication number
GB803756A
GB803756A GB1498755A GB1498755A GB803756A GB 803756 A GB803756 A GB 803756A GB 1498755 A GB1498755 A GB 1498755A GB 1498755 A GB1498755 A GB 1498755A GB 803756 A GB803756 A GB 803756A
Authority
GB
United Kingdom
Prior art keywords
acid
silica
silicon tetrafluoride
fluosilicic acid
fluosilicic
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
GB1498755A
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.)
WR Grace and Co
Original Assignee
WR Grace and 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 WR Grace and Co filed Critical WR Grace and Co
Priority to GB1498755A priority Critical patent/GB803756A/en
Publication of GB803756A publication Critical patent/GB803756A/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
    • C01B33/08—Compounds containing halogen

Abstract

Pure silicon tetrafluoride is prepared by reacting fluosilicic acid with at least a stoichiometric equivalent of silica in the presence of sulphuric acid, in which the concentration of the sulphuric acid exceeds 70 per cent by weight H2SO4 throughout the reaction. The silica may be added as silica gel 8-30 mesh. The reaction may be effected continuously by adding the fluosilicic acid continuously to a vessel continuously supplied with sulphuric acid, 93-98 per cent, and at least sufficient silica to react with all the fluosilicic acid. The process is particularly suitable for treating the unfiltered crude fluosilicic acid containing silica obtained by water scrubbing the off-gas from the acidulation of rock phosphate to superphosphate. The acid from the silicon tetrafluoride preparation may be used in rock phosphate acidulation. Reference has been directed by the Comptroller to Specification 745,800.
GB1498755A 1955-05-24 1955-05-24 Process for the preparation of silicon tetrafluoride Expired GB803756A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1498755A GB803756A (en) 1955-05-24 1955-05-24 Process for the preparation of silicon tetrafluoride

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1498755A GB803756A (en) 1955-05-24 1955-05-24 Process for the preparation of silicon tetrafluoride

Publications (1)

Publication Number Publication Date
GB803756A true GB803756A (en) 1958-10-29

Family

ID=22156985

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1498755A Expired GB803756A (en) 1955-05-24 1955-05-24 Process for the preparation of silicon tetrafluoride

Country Status (1)

Country Link
GB (1) GB803756A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0129112A2 (en) * 1983-06-20 1984-12-27 Allied Corporation Continuous production of silicon tetrafluoride gas in a vertical column
US6400493B1 (en) * 1999-10-26 2002-06-04 Agilent Technologies, Inc. Folded optical system adapted for head-mounted displays

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0129112A2 (en) * 1983-06-20 1984-12-27 Allied Corporation Continuous production of silicon tetrafluoride gas in a vertical column
EP0129112A3 (en) * 1983-06-20 1985-12-04 Allied Corporation Continuous production of silicon tetrafluoride gas in a vertical column
US6400493B1 (en) * 1999-10-26 2002-06-04 Agilent Technologies, Inc. Folded optical system adapted for head-mounted displays

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