GB816622A - Improvements in or relating to the production of fluoroform - Google Patents
Improvements in or relating to the production of fluoroformInfo
- Publication number
- GB816622A GB816622A GB129757A GB129757A GB816622A GB 816622 A GB816622 A GB 816622A GB 129757 A GB129757 A GB 129757A GB 129757 A GB129757 A GB 129757A GB 816622 A GB816622 A GB 816622A
- Authority
- GB
- United Kingdom
- Prior art keywords
- catalyst
- fluoroform
- hydrogen fluoride
- fluorodichloromethane
- chlorodifluoromethane
- 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
- XPDWGBQVDMORPB-UHFFFAOYSA-N methyl trifluoride Chemical compound FC(F)F XPDWGBQVDMORPB-UHFFFAOYSA-N 0.000 title abstract 4
- HEDRZPFGACZZDS-UHFFFAOYSA-N chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 abstract 6
- 239000003054 catalyst Substances 0.000 abstract 5
- KRHYYFGTRYWZRS-UHFFFAOYSA-N HF Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 abstract 4
- 229910000040 hydrogen fluoride Inorganic materials 0.000 abstract 4
- VOPWNXZWBYDODV-UHFFFAOYSA-N Chlorodifluoromethane Chemical compound FC(F)Cl VOPWNXZWBYDODV-UHFFFAOYSA-N 0.000 abstract 3
- UMNKXPULIDJLSU-UHFFFAOYSA-N Dichlorofluoromethane Chemical compound FC(Cl)Cl UMNKXPULIDJLSU-UHFFFAOYSA-N 0.000 abstract 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N HCl Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract 1
- NMCUIPGRVMDVDB-UHFFFAOYSA-L Iron(II) chloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 abstract 1
- RBTARNINKXHZNM-UHFFFAOYSA-K Iron(III) chloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 abstract 1
- 239000006227 byproduct Substances 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 239000007795 chemical reaction product Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 abstract 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 239000000047 product Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C17/00—Preparation of halogenated hydrocarbons
- C07C17/093—Preparation of halogenated hydrocarbons by replacement by halogens
- C07C17/20—Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms
- C07C17/202—Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms two or more compounds being involved in the reaction
- C07C17/206—Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms two or more compounds being involved in the reaction the other compound being HX
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Catalysts (AREA)
Abstract
Fluoroform is prepared by reacting gaseous chloroform with gaseous hydrogen fluoride in the presence of a catalyst consisting of active carbon impregnated with iron chloride, the reaction being carried out at a temperature between 200 DEG and 400 DEG C. The catalyst is preferably activated charcoal which has been impregnated with ferric chloride, and contains about 12 per cent of iron. Fluoroform is separated from the reaction products; and the by-products, viz. fluorodichloromethane and chlorodifluoromethane, are preferably recirculated over the catalyst with fresh chloroform and hydrogen fluoride. A preferred method of operating is to pass a mixture of hydrogen fluoride with chloroform and recirculated fluorodichloromethane and chlorodifluoromethane over the catalyst at a temperature of about 250 DEG C., and then to pass the products over catalyst in a second reaction stage at about 350 DEG C. The gaseous effluent is washed with water to remove hydrogen chloride and hydrogen fluoride; and the residual gases are dried and condensed. The condensate is fractionally distilled to isolate the fluoroform. The fluorodichloromethane and chlorodifluoromethane are returned to the first reaction stage. Specification 428,445, [Group IV], is referred to.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE563523D BE563523A (en) | 1957-01-14 | ||
| US703507A US2946827A (en) | 1957-01-14 | 1957-12-18 | Production of fluoroform |
| FR1199293D FR1199293A (en) | 1957-01-14 | 1958-01-13 | Improvements in the production of fluoroform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB816622A true GB816622A (en) | 1959-07-15 |
Family
ID=1626751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB129757A Expired GB816622A (en) | 1957-01-14 | 1957-01-14 | Improvements in or relating to the production of fluoroform |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB816622A (en) |
-
1957
- 1957-01-14 GB GB129757A patent/GB816622A/en not_active Expired
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