GB939920A - Process for the production of 1, 1, 1, -trifluoro-2-chloro-2-bromoethane - Google Patents
Process for the production of 1, 1, 1, -trifluoro-2-chloro-2-bromoethaneInfo
- Publication number
- GB939920A GB939920A GB4291861A GB4291861A GB939920A GB 939920 A GB939920 A GB 939920A GB 4291861 A GB4291861 A GB 4291861A GB 4291861 A GB4291861 A GB 4291861A GB 939920 A GB939920 A GB 939920A
- Authority
- GB
- United Kingdom
- Prior art keywords
- trifluoro
- chloro
- bromoethane
- cf3chclbr
- cf3cclbr2
- 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
- BCQZXOMGPXTTIC-UHFFFAOYSA-N halothane Chemical compound FC(F)(F)C(Cl)Br BCQZXOMGPXTTIC-UHFFFAOYSA-N 0.000 abstract 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 abstract 2
- 239000003638 chemical reducing agent Substances 0.000 abstract 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 abstract 2
- WGIRTDAEWOUFQR-UHFFFAOYSA-N 1,1-dibromo-1-chloro-2,2,2-trifluoroethane Chemical compound FC(F)(F)C(Cl)(Br)Br WGIRTDAEWOUFQR-UHFFFAOYSA-N 0.000 abstract 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 abstract 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract 1
- 239000005864 Sulphur Substances 0.000 abstract 1
- 239000002253 acid Substances 0.000 abstract 1
- 230000002378 acidificating effect Effects 0.000 abstract 1
- 239000012736 aqueous medium Substances 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 238000006317 isomerization reaction Methods 0.000 abstract 1
- 239000002609 medium Substances 0.000 abstract 1
- 230000007935 neutral effect Effects 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 230000001603 reducing effect Effects 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 abstract 1
- JVBXVOWTABLYPX-UHFFFAOYSA-L sodium dithionite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])=O JVBXVOWTABLYPX-UHFFFAOYSA-L 0.000 abstract 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 abstract 1
- 239000004289 sodium hydrogen sulphite Substances 0.000 abstract 1
- 235000010265 sodium sulphite Nutrition 0.000 abstract 1
- 239000004291 sulphur dioxide Substances 0.000 abstract 1
- 235000010269 sulphur dioxide Nutrition 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C17/00—Preparation of halogenated hydrocarbons
- C07C17/35—Preparation of halogenated hydrocarbons by reactions not affecting the number of carbon or of halogen atoms in the reaction
- C07C17/358—Preparation of halogenated hydrocarbons by reactions not affecting the number of carbon or of halogen atoms in the reaction by isomerisation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
1,1,1-Trifluoro-2-chloro-2-bromoethane is prepared by reacting, in aqueous medium at an elevated temperature, 1,1,1-trifluoro-2-chloro-2,2-dibromoethan with a watersoluble, oxygen-containing sulphur acid having reducing properties or a salt thereof. The reduction may be performed in acidic, neutral or, preferably, alkaline medium and preferred reducing agents are sodium sulphite, sodium hydrogen sulphite and sodium dithionite. Gaseous sulphur dioxide may also be used. It is advantageous to use a solution of the CF3CClBr2, which may be obtained by the isomerisation of CF2BrCClBrF, in CF3CHClBr itself. In the examples CF3CClBr2 is heated to 45 to 50 DEG C. before addition of the aqueous alkaline reducing agent and the CF3CHClBr distilled off as it is formed. Specifications 767,779, 805,764 and 873,212 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4291861A GB939920A (en) | 1961-11-30 | 1961-11-30 | Process for the production of 1, 1, 1, -trifluoro-2-chloro-2-bromoethane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4291861A GB939920A (en) | 1961-11-30 | 1961-11-30 | Process for the production of 1, 1, 1, -trifluoro-2-chloro-2-bromoethane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB939920A true GB939920A (en) | 1963-10-16 |
Family
ID=10426543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4291861A Expired GB939920A (en) | 1961-11-30 | 1961-11-30 | Process for the production of 1, 1, 1, -trifluoro-2-chloro-2-bromoethane |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB939920A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3377393A (en) * | 1966-04-21 | 1968-04-09 | Squibb & Sons Inc | 1, 1, 1, 2, 2-pentafluoro-3-chloro-3, 3-dibromopropane |
| US4910352A (en) * | 1987-10-12 | 1990-03-20 | Central Glass Company Limited | Method of preparing 1,1,1-trifluoro-2,2-dichloroethane from trifluorotrichloroethane |
| US5189229A (en) * | 1988-02-29 | 1993-02-23 | Glaxo Group Limited | Debrominating dibromofluoromethane with tributyltin hydride |
| US5430203A (en) * | 1991-07-26 | 1995-07-04 | Imperial Chemical Industries Plc | Process for the reduction of halocarbons |
-
1961
- 1961-11-30 GB GB4291861A patent/GB939920A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3377393A (en) * | 1966-04-21 | 1968-04-09 | Squibb & Sons Inc | 1, 1, 1, 2, 2-pentafluoro-3-chloro-3, 3-dibromopropane |
| US4910352A (en) * | 1987-10-12 | 1990-03-20 | Central Glass Company Limited | Method of preparing 1,1,1-trifluoro-2,2-dichloroethane from trifluorotrichloroethane |
| US5189229A (en) * | 1988-02-29 | 1993-02-23 | Glaxo Group Limited | Debrominating dibromofluoromethane with tributyltin hydride |
| US5430203A (en) * | 1991-07-26 | 1995-07-04 | Imperial Chemical Industries Plc | Process for the reduction of halocarbons |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB934786A (en) | Regenerated cellulose fibres and water-laid webs made therewith | |
| GB939920A (en) | Process for the production of 1, 1, 1, -trifluoro-2-chloro-2-bromoethane | |
| FI855072A0 (en) | FOERFARANDE FOER FRAMSTAELLNING AV ANTRAKINON. | |
| GB979450A (en) | Improvements in or relating to the production of potassium monopersulphate | |
| GB599073A (en) | Improvements in sulphur recovery | |
| GB922679A (en) | Improvements in and relating to the preparation of 2:2- dihydroxydiphenyls | |
| GB887012A (en) | Process for the preparation of 18ª--glycyrrhetinic acid | |
| GB939905A (en) | A process for preparing a penillic acid and salts thereof | |
| GB924955A (en) | A process for the manufacture of a derivative of vitamin b containing sulphur | |
| GB960246A (en) | Process for the production of 2-nitro-4-fluobenzoic and 4-nitro-2-fluobenzoic acids | |
| GB837338A (en) | Pyrimidinylazobenzene derivatives and their production | |
| GB927423A (en) | Dipiperazine sulphate solutions and method therefor | |
| GB786007A (en) | Thiazolo-pyrimidines | |
| GB786561A (en) | Manufacture of terephthalic acid | |
| GB697123A (en) | A process of preparing n-[2-alkyl-4-aminopyrimidyl(5)]-methyl-4-methyl-5--a-hydroxyethylthiazolium compounds | |
| GB850187A (en) | Production of light highly voluminous silicate or silicon dioxide | |
| GB901103A (en) | Process for the production of a therapeutically useful sulphonamide | |
| GB884881A (en) | Process for the manufacture of 2-amino-anthraquinone | |
| GB696132A (en) | Improvements in or relating to the manufacture of 2-hydroxy-4-aminobenzoic acid | |
| GB481673A (en) | Process for the manufacture of a new sulphone | |
| GB1001881A (en) | Process for modifying calcium carbonate | |
| GB918283A (en) | Process for the production of monofluorophthalic acids | |
| GB807418A (en) | Betaine ascorbate and its production | |
| GB843291A (en) | A process for the production of hyposulphurous acid and salts and esters thereof | |
| GB981283A (en) | A method for the manufacture of para-(ª‰-hydroxyethoxy) benzoic acid |