GB684117A - Process for the hydrofluorination of halogenated ethylenes - Google Patents
Process for the hydrofluorination of halogenated ethylenesInfo
- Publication number
- GB684117A GB684117A GB24737/50A GB2473750A GB684117A GB 684117 A GB684117 A GB 684117A GB 24737/50 A GB24737/50 A GB 24737/50A GB 2473750 A GB2473750 A GB 2473750A GB 684117 A GB684117 A GB 684117A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hydrogen fluoride
- anhydrous
- catalyst
- fluoride containing
- dry
- 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
- C07C17/07—Preparation of halogenated hydrocarbons by addition of hydrogen halides
- C07C17/087—Preparation of halogenated hydrocarbons by addition of hydrogen halides to unsaturated halogenated hydrocarbons
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
Halogenated ethylenes are hydrofluorinated by heating a dry halogenated ethylene with hydrogen fluoride containing more hydrogen fluoride than the commercial anhydrous hydrogen fluoride, namely a hydrogen fluoride containing 99.8 to 100 per cent HF, to reaction temperatures in the presence of one part or less per thousand of a hydrofluorination catalyst. The use of such anhydrous HF permits the use of much less catalyst and results in higher yields of halo-alkanes than when commercially anhydrous HF is used. In an example, dry trichlorethylene and anhydrous hydrogen fluoride containing 99.9-100 per cent HF are heated with an amount of a solution of BF3 in methanol as catalyst at 150 DEG C. for 24 hours in a sealed iron cylinder having a fractionating column and 1 : 1 - dichloro - 1 - fluoro - 2 - chloroethane is obtained. Other catalysts mentioned are titanium tetrachloride, antimony pentachloride, ferric chloride and aluminium chloride. Specification 627,773 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE684117X | 1949-10-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB684117A true GB684117A (en) | 1952-12-10 |
Family
ID=6597529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB24737/50A Expired GB684117A (en) | 1949-10-31 | 1950-10-10 | Process for the hydrofluorination of halogenated ethylenes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB684117A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4849555A (en) * | 1987-07-03 | 1989-07-18 | Societe Atochem | Synthesis of 1-chloro-1, 1-difluoroethane |
| EP0690834A4 (en) * | 1992-12-17 | 1995-11-02 | Laroche Chem Inc | Method for preparing 1,1-dichloro-1-fluoroethane |
-
1950
- 1950-10-10 GB GB24737/50A patent/GB684117A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4849555A (en) * | 1987-07-03 | 1989-07-18 | Societe Atochem | Synthesis of 1-chloro-1, 1-difluoroethane |
| EP0690834A4 (en) * | 1992-12-17 | 1995-11-02 | Laroche Chem Inc | Method for preparing 1,1-dichloro-1-fluoroethane |
| EP0690834A1 (en) * | 1992-12-17 | 1996-01-10 | Laroche Chemicals Inc. | Method for preparing 1,1-dichloro-1-fluoroethane |
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