GB1076699A - Process and apparatus for the preparation of fluorolefines - Google Patents
Process and apparatus for the preparation of fluorolefinesInfo
- Publication number
- GB1076699A GB1076699A GB5073763A GB5073763A GB1076699A GB 1076699 A GB1076699 A GB 1076699A GB 5073763 A GB5073763 A GB 5073763A GB 5073763 A GB5073763 A GB 5073763A GB 1076699 A GB1076699 A GB 1076699A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bed
- reactants
- products
- central zone
- temperature
- 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
Fluorolefins are made by pyrolysis of difluorochloromethane at 650-1000 DEG C. in the presence of 0-25% by weight of steam, based on halomethane, wherein a stream of reactants is run through a preheated regnerator bed consisting of granular or lumpy particles of non-volatile, mechanically and chemically inert material, and the direction of flow of the reactants is periodically reversed so as to cool the regenerator bed in its respective entrance and exit zones and maintaining the central zone of the bed at operating temperature by heating until heat losses in the bed are compensated. Specified granular materials are alumina, magnesia, zirconia, titania or calcium fluoride. It is preferred to heat the central zone of the bed to a temperature 20-50 DEG C. above that of the reaction temperature. The process is illustrated by reference to apparatus drawings (not shown). In an example, tetrafluoroethylene, hexafluoropropene and octafluorocyclobutane are obtained as products with small amounts of fluoroform, trifluorochloromethane, difluorodichloromethane and trifluoroethylene by-products.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEF38644A DE1217946B (en) | 1962-12-22 | 1962-12-22 | Process and device for the production of fluoroolefins by pyrolysis of difluorochloromethane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1076699A true GB1076699A (en) | 1967-07-19 |
Family
ID=7097437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5073763A Expired GB1076699A (en) | 1962-12-22 | 1963-12-23 | Process and apparatus for the preparation of fluorolefines |
Country Status (7)
| Country | Link |
|---|---|
| AT (1) | AT245550B (en) |
| BE (1) | BE641704A (en) |
| CH (1) | CH438268A (en) |
| DE (1) | DE1217946B (en) |
| GB (1) | GB1076699A (en) |
| LU (1) | LU44969A1 (en) |
| NL (1) | NL302391A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003051802A1 (en) * | 2001-12-18 | 2003-06-26 | E.I. Du Pont De Nemours And Company | Disposal of fluoroform (hfc-23) |
| US11760707B2 (en) | 2019-11-13 | 2023-09-19 | Fujian Yongjing Technology Co., Ltd | Process for the synthesis of 2,3,3,3-tetrafluoropropene |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8708618D0 (en) * | 1987-04-10 | 1987-05-13 | Ici Plc | Production process |
-
0
- NL NL302391D patent/NL302391A/xx unknown
-
1962
- 1962-12-22 DE DEF38644A patent/DE1217946B/en active Pending
-
1963
- 1963-12-09 LU LU44969A patent/LU44969A1/xx unknown
- 1963-12-19 CH CH1568663A patent/CH438268A/en unknown
- 1963-12-20 AT AT1029063A patent/AT245550B/en active
- 1963-12-23 GB GB5073763A patent/GB1076699A/en not_active Expired
- 1963-12-23 BE BE641704A patent/BE641704A/xx unknown
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003051802A1 (en) * | 2001-12-18 | 2003-06-26 | E.I. Du Pont De Nemours And Company | Disposal of fluoroform (hfc-23) |
| US6806396B2 (en) | 2001-12-18 | 2004-10-19 | E. I. Du Pont De Nemours And Company | Disposal of fluoroform (HFC-23) |
| CN100343209C (en) * | 2001-12-18 | 2007-10-17 | 纳幕尔杜邦公司 | Disposal of fluoroform (HFC-23) |
| US11760707B2 (en) | 2019-11-13 | 2023-09-19 | Fujian Yongjing Technology Co., Ltd | Process for the synthesis of 2,3,3,3-tetrafluoropropene |
Also Published As
| Publication number | Publication date |
|---|---|
| AT245550B (en) | 1966-03-10 |
| DE1217946B (en) | 1966-06-02 |
| BE641704A (en) | 1964-06-23 |
| CH438268A (en) | 1967-06-30 |
| LU44969A1 (en) | 1964-02-10 |
| NL302391A (en) |
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