GB1263505A - Process for the production of substantially impurity-free high percent hydrofluoric acid - Google Patents
Process for the production of substantially impurity-free high percent hydrofluoric acidInfo
- Publication number
- GB1263505A GB1263505A GB1142369A GB1142369A GB1263505A GB 1263505 A GB1263505 A GB 1263505A GB 1142369 A GB1142369 A GB 1142369A GB 1142369 A GB1142369 A GB 1142369A GB 1263505 A GB1263505 A GB 1263505A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sif
- solvent
- hydrofluoric acid
- inert
- march
- 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
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 title abstract 6
- 238000000034 method Methods 0.000 title abstract 2
- 239000002904 solvent Substances 0.000 abstract 4
- 239000011261 inert gas Substances 0.000 abstract 3
- 239000000203 mixture Substances 0.000 abstract 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract 2
- 238000010521 absorption reaction Methods 0.000 abstract 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 1
- 125000001931 aliphatic group Chemical group 0.000 abstract 1
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract 1
- 239000001569 carbon dioxide Substances 0.000 abstract 1
- 230000005494 condensation Effects 0.000 abstract 1
- 238000009833 condensation Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- 239000007791 liquid phase Substances 0.000 abstract 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 abstract 1
- 239000003960 organic solvent Substances 0.000 abstract 1
- 229920000570 polyether Polymers 0.000 abstract 1
- 229920000151 polyglycol Polymers 0.000 abstract 1
- 239000010695 polyglycol Substances 0.000 abstract 1
- 229920005862 polyol Polymers 0.000 abstract 1
- 150000003077 polyols Chemical class 0.000 abstract 1
- 230000002000 scavenging effect Effects 0.000 abstract 1
- ABTOQLMXBSRXSM-UHFFFAOYSA-N silicon tetrafluoride Chemical compound F[Si](F)(F)F ABTOQLMXBSRXSM-UHFFFAOYSA-N 0.000 abstract 1
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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Gas Separation By Absorption (AREA)
- Treating Waste Gases (AREA)
- Silicon Compounds (AREA)
Abstract
1,263,505. Purifying hydrofluoric acid; silicon tetrafluoride. BUSS A.G. 4 March, 1969 [9 March, 1968], No. 11423/69. Heading C1A. High per cent hydrofluoric acid, substantially free from SiF 4 , is obtained from H 2 SiF 6 solutions or HF, SiF 4 and/or H 2 SiF 6 mixtures by contacting the solution or mixture in an absorption column with an organic solvent for HF and, to a lesser extent, H 2 O and SiF 4 , thereafter scavenging the said solvent and its contacts in a separating column by contra-flow of a gas inert to H 2 O, HF or H 2 SiF 6 , to remove at least the majority of the SiF 4 and H 2 O therefrom and then separating HF from the scavenged solvent, the process being carried out above the condensation temperature of any vapour mixture present. Suitable inert gases are nitrogen or carbon dioxide, and the inert gas is preferably also led into the absorption column to improve the selectivity of the solvent for HF as compared to H 2 O and SiF 4 . Suitable solvents are aliphatic polyethers or polyols especially polyglycols. The inert gas may be preheated and the temperature suitably drops from 135‹ to 100‹ C. in contraflow to the liquid phase.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19681667537 DE1667537A1 (en) | 1968-03-09 | 1968-03-09 | Process for the production of high percentage hydrogen acids of the halogens that are largely free of impurities |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1263505A true GB1263505A (en) | 1972-02-09 |
Family
ID=5685972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1142369A Expired GB1263505A (en) | 1968-03-09 | 1969-03-04 | Process for the production of substantially impurity-free high percent hydrofluoric acid |
Country Status (7)
| Country | Link |
|---|---|
| AT (1) | AT292633B (en) |
| BE (1) | BE729649A (en) |
| CH (1) | CH527125A (en) |
| DE (1) | DE1667537A1 (en) |
| FR (1) | FR2003576A1 (en) |
| GB (1) | GB1263505A (en) |
| NL (1) | NL6903399A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2921916C2 (en) * | 1979-05-30 | 1982-05-27 | Chemische Werke Hüls AG, 4370 Marl | Process for the production of gaseous hydrogen chloride from dilute aqueous hydrochloric acid |
| DE2836580C3 (en) * | 1978-08-21 | 1981-11-05 | Chemische Werke Hüls AG, 4370 Marl | Process for the separation of hydrogen chloride and hydrogen bromide |
| US4237110A (en) * | 1979-04-30 | 1980-12-02 | The Dow Chemical Company | Process for separating and recovering concentrated hydrochloric acid from the crude product obtained from the acid hydrolysis of cellulose |
-
1968
- 1968-03-09 DE DE19681667537 patent/DE1667537A1/en active Pending
-
1969
- 1969-02-10 AT AT132769A patent/AT292633B/en not_active IP Right Cessation
- 1969-02-28 CH CH301469A patent/CH527125A/en not_active IP Right Cessation
- 1969-03-04 GB GB1142369A patent/GB1263505A/en not_active Expired
- 1969-03-05 NL NL6903399A patent/NL6903399A/xx unknown
- 1969-03-07 FR FR6906487A patent/FR2003576A1/fr not_active Withdrawn
- 1969-03-10 BE BE729649D patent/BE729649A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| AT292633B (en) | 1971-09-10 |
| DE1667537A1 (en) | 1971-06-16 |
| NL6903399A (en) | 1969-09-11 |
| CH527125A (en) | 1972-08-31 |
| BE729649A (en) | 1969-08-18 |
| FR2003576A1 (en) | 1969-11-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1420037A (en) | Process for the simultaneous separation of ethylene oxide and carbon dioxide from the gaseous mixtures obtained in the direct oxidation of ethylene with oxygen | |
| GB1409604A (en) | Process for the purification of ethylene oxide | |
| ES8506204A1 (en) | Cryogenic process for removing acid gases from gas mixtures by means of a solvent | |
| GB1420542A (en) | Method of recovery of hydrochloric acid in gaseous form | |
| GB902713A (en) | Process of producing anhydrous urea | |
| GB1263505A (en) | Process for the production of substantially impurity-free high percent hydrofluoric acid | |
| GB1021963A (en) | A process for working up waste gases containing hydrogen chloride | |
| GB1495452A (en) | Removal of sulphur compounds from gas streams | |
| GB1243451A (en) | Production of nitric acid | |
| GB1384065A (en) | Process for the purification of organic isocyanates | |
| GB1516745A (en) | Process for the production of nitric acid | |
| GB999137A (en) | Process for the production of hydrofluoric acid | |
| GB956179A (en) | Acetylene recovery process | |
| NO921283L (en) | PROCEDURE FOR THE EXTRACTION OF DINITROGEN PENTOXYDE | |
| GB996480A (en) | Improvements relating to the production of gaseous oxides | |
| GB804686A (en) | Improvements relating to the purification of lactams | |
| US2726932A (en) | Processing dilute h2s streams | |
| SU462376A1 (en) | Method for purifying inert gases and hydrogen from oxygen impurity and moisture | |
| US2960386A (en) | Process for the recovery of nitric oxide | |
| GB1137037A (en) | Process for the extraction and the concentration of hydrogen fluoride | |
| GB590767A (en) | Method of separating the components of azeotropic mixtures | |
| GB672723A (en) | Improvements in or relating to the removal of carbonaceous materials from sulphuric acid | |
| GB764401A (en) | Improvements in or relating to methods of purifying chlorine | |
| GB876494A (en) | Process for separating acetylene from gaseous mixtures containing it | |
| SU493236A1 (en) | The method of cleaning gases produced freon |