RU2007122705A - METHOD FOR PRODUCING SILICON TETRAFLUORIDE - Google Patents
METHOD FOR PRODUCING SILICON TETRAFLUORIDE Download PDFInfo
- Publication number
- RU2007122705A RU2007122705A RU2007122705/15A RU2007122705A RU2007122705A RU 2007122705 A RU2007122705 A RU 2007122705A RU 2007122705/15 A RU2007122705/15 A RU 2007122705/15A RU 2007122705 A RU2007122705 A RU 2007122705A RU 2007122705 A RU2007122705 A RU 2007122705A
- Authority
- RU
- Russia
- Prior art keywords
- salt
- hydrofluoric acid
- solution
- decomposition
- silicon tetrafluoride
- Prior art date
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- Silicon Compounds (AREA)
Abstract
1. Способ получения тетрафторида кремния из раствора кремнефтористоводородной кислоты, включающий образование соли кремнефтористоводородной кислоты, ее промывку, сушку и последующее разложение, отличающийся тем, что выделившиеся в результате разложения соли кремнефтористоводородной кислоты тетрафторид кремния и фтористый водород без разделения пропускают через диоксид кремния.2. Способ по п.1, отличающийся тем, что соль образовывают путем взаимодействия кремнефтористоводородной кислоты с раствором органического основания.3. Способ по п.1, отличающийся тем, что разложение соли осуществляют путем обработки ее концентрированной минеральной кислотой.4. Способ по п.3, отличающийся тем, что в качестве минеральной кислоты используют олеум, содержащий 3-5 мас.% свободного серного ангидрида.5. Способ по п.1, отличающийся тем, что сушку осуществляют потоком воздуха или инертного газа, подогретого до 55-60°С.6. Способ по п.1, отличающийся тем, что диоксид кремния помещен в 4-7%-ный раствор олеума.1. A method of producing silicon tetrafluoride from a solution of hydrofluoric acid, including the formation of hydrofluoric acid salt, washing, drying and subsequent decomposition, characterized in that silicon tetrafluoride and hydrogen fluoride released from the decomposition of hydrofluoric acid salt and hydrogen fluoride are passed through silicon dioxide without separation. 2. The method according to claim 1, characterized in that the salt is formed by reacting hydrofluoric acid with a solution of an organic base. The method according to claim 1, characterized in that the decomposition of the salt is carried out by treating it with concentrated mineral acid. The method according to claim 3, characterized in that oleum containing 3-5 wt.% Free sulfuric anhydride is used as a mineral acid. The method according to claim 1, characterized in that the drying is carried out by a stream of air or inert gas, heated to 55-60 ° C. The method according to claim 1, characterized in that the silicon dioxide is placed in a 4-7% solution of oleum.
Claims (6)
Priority Applications (13)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2007122705/15A RU2007122705A (en) | 2007-06-19 | 2007-06-19 | METHOD FOR PRODUCING SILICON TETRAFLUORIDE |
BRPI0813442A BRPI0813442A8 (en) | 2007-06-19 | 2008-05-15 | METHOD FOR PRODUCTION OF POLYCRYSTALLINE SILICON FROM A SOLUTION OF HYDROSILICOFLUORIDIC ACID, AND INSTALLATION FOR PRODUCTION OF POLYCRYSTALLINE SILICON FROM A SOLUTION OF FLUOROSILICIC ACID IN THE FORM OF A POWDER WITH SPHERICAL-SHAPED PARTICLES |
UAA201000460A UA98148C2 (en) | 2007-06-19 | 2008-08-15 | Method for producing of polycrystalline silicon from solution of fluorosilicic acid and device for the preparation of polycrystalline silicon |
AU2008271340A AU2008271340B2 (en) | 2007-06-19 | 2008-08-15 | Method for producing polycrystalline silicon |
EP08826022.9A EP2172423A4 (en) | 2007-06-19 | 2008-08-15 | Method for producing polycrystalline silicon from a hydrosilicofluoric acid solution and a plant for producing silicon tetrafluoride and polycrystalline silicon |
CA002684973A CA2684973A1 (en) | 2007-06-19 | 2008-08-15 | Method for producing polycrystalline silicon |
EA201000036A EA015477B1 (en) | 2007-06-19 | 2008-08-15 | Method for producing polycrystalline silicon from a hydrosilicofluoric acid solution and a plant for producing polycrystalline silicon |
US12/665,689 US20100221171A1 (en) | 2007-06-19 | 2008-08-15 | Method for producing polycrystalline silicon |
PCT/RU2008/000523 WO2009005412A2 (en) | 2007-06-19 | 2008-08-15 | Method for producing polycrystalline silicon |
TNP2009000523A TN2009000523A1 (en) | 2007-06-19 | 2009-12-11 | Method for producing polycrystalline silicon from hudrosiliconfluoric acid solution and a plant for the producing silicon tetrafluoride and polycrystalline silicon |
IL202815A IL202815A0 (en) | 2007-06-19 | 2009-12-17 | Method for producing polycrystalline silicon from hudrosiliconfluoric acid solution and a plant for the producing silicon tetrafluoride and polycrystalline silicon |
MA32492A MA31511B1 (en) | 2007-06-19 | 2010-01-07 | PROCESS FOR PRODUCING POLYCRYSTALLINE SILICON FROM FLUOROSILICIC ACID SOLUTION AND MANUFACTURING PLANT FOR SILICON TETRAFLUORIDE AND POLYCRYSTALLINE SILICON |
ZA2010/00388A ZA201000388B (en) | 2007-06-19 | 2010-01-19 | Method for producing polycrystalline silicon from a hydrosilicofluoric acid solution and a plant for producing silicon tetrafluoride and polyctystalline silicon |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2007122705/15A RU2007122705A (en) | 2007-06-19 | 2007-06-19 | METHOD FOR PRODUCING SILICON TETRAFLUORIDE |
Publications (1)
Publication Number | Publication Date |
---|---|
RU2007122705A true RU2007122705A (en) | 2008-12-27 |
Family
ID=48229024
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
RU2007122705/15A RU2007122705A (en) | 2007-06-19 | 2007-06-19 | METHOD FOR PRODUCING SILICON TETRAFLUORIDE |
Country Status (2)
Country | Link |
---|---|
RU (1) | RU2007122705A (en) |
UA (1) | UA98148C2 (en) |
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2007
- 2007-06-19 RU RU2007122705/15A patent/RU2007122705A/en not_active Application Discontinuation
-
2008
- 2008-08-15 UA UAA201000460A patent/UA98148C2/en unknown
Also Published As
Publication number | Publication date |
---|---|
UA98148C2 (en) | 2012-04-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FA92 | Acknowledgement of application withdrawn (lack of supplementary materials submitted) |
Effective date: 20081218 |