GB1371790A - Production of hydrogen fluoride - Google Patents
Production of hydrogen fluorideInfo
- Publication number
- GB1371790A GB1371790A GB338272A GB338272A GB1371790A GB 1371790 A GB1371790 A GB 1371790A GB 338272 A GB338272 A GB 338272A GB 338272 A GB338272 A GB 338272A GB 1371790 A GB1371790 A GB 1371790A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fluoride
- heated
- h2so4
- temp
- jan
- 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
- C01B7/00—Halogens; Halogen acids
- C01B7/19—Fluorine; Hydrogen fluoride
- C01B7/191—Hydrogen fluoride
- C01B7/192—Preparation from fluorspar
-
- 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
- C01B33/10—Compounds containing silicon, fluorine, and other elements
- C01B33/103—Fluosilicic acid; Salts thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Glass Compositions (AREA)
Abstract
1371790 Hydrogen fluoride preparation BAYER AG 25 Jan 1972 [26 Jan 1971] 3382/72 Heading C1A HF and a by-product metal sulphate are prepared by (a) pre-heating a solid metal fluoride, e.g. ÀCaF2 or NaSiF6, in a gaseous suspension having a solid/gas conen. of 0À2-4 kg./Nm.<3> to a temp. of 500-800‹ C. and then (b) reacting the pre-heated fluoride with H2SO4 at a temp. of 100-500‹ C. The fluoride may have a ptle. size of 40-250 Á and contain basic additives, e.g. NaOH, KOH, Na2CO3 or K2CO3, in amounts up to 20 mole per cent added before or after the pre-heat treatment to increase the exothermicity of the subsequent acid reaction. The fluoride may be heated in countercurrent by burning carbonaceous materials. The H2SO4 may be added to the fluoride partly as SO3 or oleum either incrementally or in one step preferably outside the reaction furnace. In an embodiment of the process ground CaF2 is fed via 5 into heat exchanger 6 heated by hot combustion gases entering at 7 and exiting at 19, the heated fluoride is then removed from the exchanger at 10 and brought into contact with increments of H2SO4 supplied via 12, prior to being heated with the acid in the rotary furnace 13. Basic additives may be supplied either to the hot fluoride at 17 or to the cold fluoride at 18.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2103338A DE2103338C3 (en) | 1971-01-26 | 1971-01-26 | Process for the production of hydrofluoric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1371790A true GB1371790A (en) | 1974-10-30 |
Family
ID=5796819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB338272A Expired GB1371790A (en) | 1971-01-26 | 1972-01-25 | Production of hydrogen fluoride |
Country Status (10)
| Country | Link |
|---|---|
| AU (1) | AU454507B2 (en) |
| BE (1) | BE778516A (en) |
| CA (1) | CA981870A (en) |
| DE (1) | DE2103338C3 (en) |
| ES (1) | ES399184A1 (en) |
| FR (1) | FR2123448B1 (en) |
| GB (1) | GB1371790A (en) |
| IT (1) | IT948541B (en) |
| NL (1) | NL7200946A (en) |
| ZA (1) | ZA72492B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4150102A (en) * | 1975-10-02 | 1979-04-17 | Bayer Aktiengesellschaft | Purifying hydrofluoric acid |
| US6841140B2 (en) | 2000-07-10 | 2005-01-11 | Daikin Industries, Ltd. | Method and apparatus for producing hydrogen fluoride |
| CN115487518A (en) * | 2022-10-15 | 2022-12-20 | 江西天晟化工有限公司 | Electronic-grade hydrofluoric acid production device and production method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1316980A (en) * | 1961-04-27 | 1963-02-01 | Allied Chem | Process for manufacturing hydrofluoric acid by the action of sulfuric acid on fluorspar |
-
1971
- 1971-01-26 DE DE2103338A patent/DE2103338C3/en not_active Expired
-
1972
- 1972-01-06 AU AU37633/72A patent/AU454507B2/en not_active Expired
- 1972-01-24 NL NL7200946A patent/NL7200946A/xx unknown
- 1972-01-24 IT IT47894/72A patent/IT948541B/en active
- 1972-01-24 CA CA132,998A patent/CA981870A/en not_active Expired
- 1972-01-25 ZA ZA720492A patent/ZA72492B/en unknown
- 1972-01-25 GB GB338272A patent/GB1371790A/en not_active Expired
- 1972-01-25 ES ES399184A patent/ES399184A1/en not_active Expired
- 1972-01-26 BE BE778516A patent/BE778516A/en unknown
- 1972-01-26 FR FR7202608A patent/FR2123448B1/fr not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4150102A (en) * | 1975-10-02 | 1979-04-17 | Bayer Aktiengesellschaft | Purifying hydrofluoric acid |
| US6841140B2 (en) | 2000-07-10 | 2005-01-11 | Daikin Industries, Ltd. | Method and apparatus for producing hydrogen fluoride |
| CN115487518A (en) * | 2022-10-15 | 2022-12-20 | 江西天晟化工有限公司 | Electronic-grade hydrofluoric acid production device and production method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2103338A1 (en) | 1972-08-03 |
| ES399184A1 (en) | 1974-12-16 |
| AU3763372A (en) | 1973-07-12 |
| BE778516A (en) | 1972-07-26 |
| FR2123448A1 (en) | 1972-09-08 |
| DE2103338B2 (en) | 1975-01-16 |
| CA981870A (en) | 1976-01-20 |
| AU454507B2 (en) | 1974-10-31 |
| IT948541B (en) | 1973-06-11 |
| ZA72492B (en) | 1972-09-27 |
| FR2123448B1 (en) | 1977-04-01 |
| NL7200946A (en) | 1972-07-28 |
| DE2103338C3 (en) | 1978-03-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1227846A (en) | ||
| ES485807A1 (en) | Process for purifying silicon | |
| ES423320A1 (en) | Production of metal fluorides from fluosilicic acid | |
| GB1431188A (en) | Process for the production of sulphuric acid from sulphur and oxygen | |
| US3275407A (en) | Method of recovery of ammonia and sulfur dioxide | |
| GB1371790A (en) | Production of hydrogen fluoride | |
| US1859998A (en) | Hydrated silica | |
| US2696424A (en) | Preparation of calcium bisulfite cooking acid from waste sulfite liquor | |
| GB1484164A (en) | Production of silicon carbide | |
| CA1077677A (en) | Process for preparing sulfur dioxide from sulfur and oxygen | |
| JPS62143813A (en) | Production of silicon tetrachloride | |
| GB986561A (en) | A process for decomposing zircon sand | |
| GB940289A (en) | Process for the manufacture of hydrogen fluoride | |
| GB1428684A (en) | Process for preparing urea | |
| GB734080A (en) | Improvements relating to the production of hydrochloric acid from chlorides | |
| JPS6137202B2 (en) | ||
| GB1151316A (en) | Improvements in or relating to a Claus Process | |
| US3173755A (en) | Synthesis of calcium cyanamide | |
| GB902076A (en) | Improvements relating to the production of silicon tetrachloride | |
| US3169143A (en) | Preparation of 2-aminoethyl hydrogen sulfate | |
| SU315412A1 (en) | Method for producing vanadium trioxide | |
| JPH0742114B2 (en) | Vanadium lower oxide manufacturing method | |
| GB203798A (en) | Method of manufacture of alumina from sulphate of aluminium | |
| GB173300A (en) | Improvements in the manufacture and production of hydrochloric acid | |
| GB969618A (en) | Method of producing metal oxides |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |