GB990156A - Synthesis of hexafluorobenzene - Google Patents
Synthesis of hexafluorobenzeneInfo
- Publication number
- GB990156A GB990156A GB135561A GB135561A GB990156A GB 990156 A GB990156 A GB 990156A GB 135561 A GB135561 A GB 135561A GB 135561 A GB135561 A GB 135561A GB 990156 A GB990156 A GB 990156A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hexafluorobenzene
- tube
- reaction
- symmetrical
- carried out
- 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
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C17/00—Preparation of halogenated hydrocarbons
- C07C17/26—Preparation of halogenated hydrocarbons by reactions involving an increase in the number of carbon atoms in the skeleton
- C07C17/263—Preparation of halogenated hydrocarbons by reactions involving an increase in the number of carbon atoms in the skeleton by condensation reactions
- C07C17/269—Preparation of halogenated hydrocarbons by reactions involving an increase in the number of carbon atoms in the skeleton by condensation reactions of only halogenated hydrocarbons
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Hexafluorobenzene is obtained by pyrolysing dichloromonofluoromethane at 500 DEG C. to 700 DEG C., cooling the products to a liquid form, deacidifying the liquid product, e.g. using an alkaline solution, and separating the hexafluorobenzene from the liquid product. The pyrolysis is desirably carried out in a heated corrosion-resistant tube for a period of 1 to 30 seconds. The tube may be packed or unpacked and constructed of a noble metal, e.g. platinum, or silica. The reaction is generally carried out at atmospheric pressure, although higher and lower pressures may be used. The reactants may be diluted with an inert gas, e.g. helium or nitrogen, and hydrogen may also be introduced into the reaction tube to minimize side reactions. The pyrolysis yields, in addition to hexafluorobenzene, trichlorofluoromethane, symmetrical dichlorodifluoroethylene, symmetrical tetrachlorodifluoroethane, pentafluorobenzene, polychloropolyfluorobenzenes and other compounds as yet unidentified but probably comprising polychloropolyfluoro - butanes, - butadienes, -hexanes and -hexadienes. The hexafluorobenzene may be isolated from the reaction products by fractional distillation or gas-liquid chromatography. Reference has been directed by the Comptroller to Specification 936,610.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB135561A GB990156A (en) | 1961-02-20 | 1961-02-20 | Synthesis of hexafluorobenzene |
| CH207362A CH411817A (en) | 1961-02-20 | 1962-02-20 | Process for the production of hexafluorobenzene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB135561A GB990156A (en) | 1961-02-20 | 1961-02-20 | Synthesis of hexafluorobenzene |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB990156A true GB990156A (en) | 1965-04-28 |
Family
ID=9720577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB135561A Expired GB990156A (en) | 1961-02-20 | 1961-02-20 | Synthesis of hexafluorobenzene |
Country Status (2)
| Country | Link |
|---|---|
| CH (1) | CH411817A (en) |
| GB (1) | GB990156A (en) |
-
1961
- 1961-02-20 GB GB135561A patent/GB990156A/en not_active Expired
-
1962
- 1962-02-20 CH CH207362A patent/CH411817A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH411817A (en) | 1966-04-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB962235A (en) | Hydrogenation of nitriles | |
| GB902590A (en) | Production of heptafluoropropane | |
| GB823824A (en) | Process for the preparation of mercaptans | |
| GB990156A (en) | Synthesis of hexafluorobenzene | |
| GB873614A (en) | Improvements in or relating to the production of substituted cyclohexanone peroxides | |
| Birchall et al. | 418. Polyfluoroarenes. Part III. A new synthesis of hexafluorobenzene | |
| Pac et al. | Direct introduction of ethoxycarbonyl radical into hydrocarbons by photochemical reactions | |
| GB992742A (en) | Preparation of permonosulphates | |
| GB878766A (en) | Improvements in and relating to the production of a chemical element by the dissociation of a gaseous hydride thereof | |
| GB1006008A (en) | Process for producing methyl 2,5-hexadienoate and methyl acrylate | |
| GB555240A (en) | Improvements in and relating to the catalytic hydrogenation of organic compounds | |
| GB1023856A (en) | Method for purifying aqueous solutions of methylbutynol | |
| GB863408A (en) | Method of producing chlorofluoro-derivatives of aliphatic hydrocarbons | |
| GB863721A (en) | Improvements in or relating to halogenated cyclobutane derivatives | |
| GB776113A (en) | Improvements in or relating to the production of beta-hydroxy-ethyl-hydrazine | |
| GB918983A (en) | Production of unsaturated ketones | |
| GB951294A (en) | Improved process for the recovery of cyclohexane | |
| GB824567A (en) | Process for producing pure monovinylacetylene from gas mixtures | |
| GB939577A (en) | Method for manufacture of 5-chloro-2, 4-bis (methylsulfamyl)-aniline | |
| ES251214A1 (en) | Procedure for the preparation of unsaturated ketones (Machine-translation by Google Translate, not legally binding) | |
| GB938837A (en) | Process for the production of carbonyl compounds | |
| GB864882A (en) | Process for the production of 2-chloro-3:4-epoxybutene-1 | |
| FR1208904A (en) | Coffee maker of the so-called overturning type, heated by an exothermic chemical reaction | |
| GB987382A (en) | Improved process for the production of monochlorobenzene | |
| GB874337A (en) | Process for preparing nitro derivatives of chloro-substituted ethylenes |