GB896068A - Process for the production of chloropentafluoroethane - Google Patents
Process for the production of chloropentafluoroethaneInfo
- Publication number
- GB896068A GB896068A GB463561A GB463561A GB896068A GB 896068 A GB896068 A GB 896068A GB 463561 A GB463561 A GB 463561A GB 463561 A GB463561 A GB 463561A GB 896068 A GB896068 A GB 896068A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chromium
- chromium oxide
- chloride
- mixed
- aqueous
- 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
- C07C17/093—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)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
Catalysts suitable for fluorination (see Group IV(b)) contain chromium oxide. The catalyst may be the granular hydrous chromium oxide obtained by the action of ammonium hydroxide on an aqueous chromium salt solution; the partially dried precipitate can be cubed. In other variations: the hydrous chromium oxide may be mixed with a minor proportion of chromium chloride and pelleted; ammonium hydroxide can be reacted with a mixed chromium chloride and aluminium chloride solution, and the precipitate used in the form of granules, cubes or pellets; or the chromium oxide may be supported on alumina, e.g. by impregnating porous alumina with aqueous CrO3 solution, drying, and reducing at elevated temperatures in an atmosphere of hydrogen.ALSO:Chloropentafluoroethane is prepared by heating CF3CCl3, CF3CFCl2 or a mixture thereof with hydrogen fluoride at 200 DEG C.-500 DEG C. in the presence of a chromium fluorination catalyst. The reaction pressure may be atmospheric or sub- or superatmospheric. The fluorination catalyst may be granular hydrous chromium oxide precipitated by the action of ammonium hydroxide on aqueous chromium chloride or other chromium salt solution; the precipitate may be used in the form of cubes prepared from the partially dried product. Mixed and supported catalysts containing chromium oxide are also described (see Group III).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US751160A | 1960-02-09 | 1960-02-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB896068A true GB896068A (en) | 1962-05-09 |
Family
ID=21726630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB463561A Expired GB896068A (en) | 1960-02-09 | 1961-02-08 | Process for the production of chloropentafluoroethane |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1443184A1 (en) |
| GB (1) | GB896068A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4605798A (en) * | 1980-12-31 | 1986-08-12 | Pcuk Products Chimiques Ugine Kuhlmann | Continuous process for the gaseous-phase preparation of trichlorotrifluoroethane, dichlorotetrafluoroethane and monochloropentafluoroethane in controlled proportions |
| US5955637A (en) * | 1993-11-01 | 1999-09-21 | E. I. Du Pont De Nemours And Company | Production of dihalomethanes containing fluorine and azeotropes of dihalomethanes containing chlorine with HF |
| CN110496615A (en) * | 2019-08-23 | 2019-11-26 | 江苏蓝色星球环保科技股份有限公司 | A kind of preparation method of catalysts for gas phase fluorination |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2590251B1 (en) * | 1985-11-15 | 1988-10-14 | Atochem | PROCESS FOR THE SYNTHESIS OF CHLOROPENTAFLUOROETHANE FROM DICHLOROTETRAFLUOROETHANE AND FLUORHYDRIC ACID |
-
1961
- 1961-01-23 DE DE19611443184 patent/DE1443184A1/en active Pending
- 1961-02-08 GB GB463561A patent/GB896068A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4605798A (en) * | 1980-12-31 | 1986-08-12 | Pcuk Products Chimiques Ugine Kuhlmann | Continuous process for the gaseous-phase preparation of trichlorotrifluoroethane, dichlorotetrafluoroethane and monochloropentafluoroethane in controlled proportions |
| US5955637A (en) * | 1993-11-01 | 1999-09-21 | E. I. Du Pont De Nemours And Company | Production of dihalomethanes containing fluorine and azeotropes of dihalomethanes containing chlorine with HF |
| US6274781B1 (en) * | 1993-11-01 | 2001-08-14 | E. I. Du Pont De Nemours And Company | Production of dihalomethanes containing fluorine and azeotropes of dihalomethanes containing chlorine with HF |
| CN110496615A (en) * | 2019-08-23 | 2019-11-26 | 江苏蓝色星球环保科技股份有限公司 | A kind of preparation method of catalysts for gas phase fluorination |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1443184A1 (en) | 1968-10-17 |
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