GB1011234A - Process for the recovery of silica and hydrogen fluoride from waste gases - Google Patents
Process for the recovery of silica and hydrogen fluoride from waste gasesInfo
- Publication number
- GB1011234A GB1011234A GB3548562A GB3548562A GB1011234A GB 1011234 A GB1011234 A GB 1011234A GB 3548562 A GB3548562 A GB 3548562A GB 3548562 A GB3548562 A GB 3548562A GB 1011234 A GB1011234 A GB 1011234A
- Authority
- GB
- United Kingdom
- Prior art keywords
- silica
- pipe
- hydrogen fluoride
- waste gas
- recovery
- 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
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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Silicon Compounds (AREA)
Abstract
Waste gas from the acidulation of phosphatic ore with alkylation grade sulphuric acid, which contains carbonaceous combustible material and silicon tetrachloride, is passed to a combustion and hydrolysis zone at 800-3000 DEG F., silica is <PICT:1011234/C1/1> removed from the product gas in a cyclone separator above 300 DEG F., and hydrogen fluoride is removed from the remaining gas by absorption in water. Fuel, steam and air are added, as required, to the waste gas to be burnt. The content of oxygen should be only just sufficient to support combustion. As shown, waste gas is mixed successively with air from pipe 22, fuel from pipe 21 and stem from pipe 26 and burnt in a chamber 18.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US4679A US3110562A (en) | 1960-01-26 | 1960-01-26 | Process for recovery of hf and sio2 from waste gases |
| DEH46700A DE1193925B (en) | 1962-08-20 | 1962-08-20 | Process for the production of amorphous, finely divided silicon dioxide and hydrogen fluoride or metal fluorides from silicon tetrafluoride, hydrofluoric acid and silicon dioxide in suspended form and exhaust gases containing water vapor |
| GB3548562A GB1011234A (en) | 1962-09-18 | 1962-09-18 | Process for the recovery of silica and hydrogen fluoride from waste gases |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3548562A GB1011234A (en) | 1962-09-18 | 1962-09-18 | Process for the recovery of silica and hydrogen fluoride from waste gases |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1011234A true GB1011234A (en) | 1965-11-24 |
Family
ID=10378262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3548562A Expired GB1011234A (en) | 1960-01-26 | 1962-09-18 | Process for the recovery of silica and hydrogen fluoride from waste gases |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1011234A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4206189A (en) | 1977-01-04 | 1980-06-03 | Belov Viktor Y | Method of producing hydrogen fluoride and silicon dioxide from silicon tetra-fluoride |
| CN117163965A (en) * | 2023-08-02 | 2023-12-05 | 建德华明科技有限公司 | A method for preparing silica from silicone rubber cracking waste residue |
-
1962
- 1962-09-18 GB GB3548562A patent/GB1011234A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4206189A (en) | 1977-01-04 | 1980-06-03 | Belov Viktor Y | Method of producing hydrogen fluoride and silicon dioxide from silicon tetra-fluoride |
| CN117163965A (en) * | 2023-08-02 | 2023-12-05 | 建德华明科技有限公司 | A method for preparing silica from silicone rubber cracking waste residue |
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