GB1384036A - Process for pyrolyzing tetrafluoroethylene to hexafluoropropylene - Google Patents
Process for pyrolyzing tetrafluoroethylene to hexafluoropropyleneInfo
- Publication number
- GB1384036A GB1384036A GB2771973A GB2771973A GB1384036A GB 1384036 A GB1384036 A GB 1384036A GB 2771973 A GB2771973 A GB 2771973A GB 2771973 A GB2771973 A GB 2771973A GB 1384036 A GB1384036 A GB 1384036A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hexafluoropropylene
- per cent
- unreacted
- june
- conversion
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
1384036 Hexafluoropropylene process E I DU PONT DE NEMOURS & CO 11 June 1973 [12 June 1972] 27719/73 Heading C2C Hexafluoropropylene is produced by pyrolysing a mixture containing tetrafluoroethylene and CO 2 in a weight ratio of from 1À1 : 1 to 25 : 1 in a reaction zone at a total pressure of 0À75-2 atmospheres absolute, partial pressure of C 2 F 4 of at least 360 mm. Hg absolute and a temperature of 700-900‹ C. to a conversion of C 2 F 4 of at least 20 wt. per cent to C 3 F 6 and a mixture of CO 2 and unreacted C 2 F 4 is separated from the C 3 F 6 . Preferably the feed mixture contains at least 40 wt. per cent of CO 2 and the conversion of C 2 F 4 is 20-80 wt. per cent. HCl or HF may be added to the pyrolysis furnace adjacent to the exit end of the furnace to inhibit polymerization of unreacted C 2 F 4 . The CO 2 and C 2 F 4 are preferably removed from the final reaction product by distillation.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US261629A US3873630A (en) | 1972-06-12 | 1972-06-12 | Process for pyrolyzing tetrafluoroethylene to hexafluoropropylene |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1384036A true GB1384036A (en) | 1975-02-19 |
Family
ID=22994148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2771973A Expired GB1384036A (en) | 1972-06-12 | 1973-06-11 | Process for pyrolyzing tetrafluoroethylene to hexafluoropropylene |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3873630A (en) |
| JP (1) | JPS5728696B2 (en) |
| CA (1) | CA1015771A (en) |
| DE (1) | DE2329750C2 (en) |
| FR (1) | FR2187743B1 (en) |
| GB (1) | GB1384036A (en) |
| IT (1) | IT989657B (en) |
| NL (1) | NL7308149A (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4365102A (en) * | 1980-09-29 | 1982-12-21 | E. I. Du Pont De Nemours And Company | Method of manufacturing perfluoromethane and perfluoroethane |
| US5334783A (en) * | 1988-03-14 | 1994-08-02 | Hoechst Aktiengesellschaft | Process for the preparation of hexafluoropropene |
| US5057634A (en) * | 1989-12-19 | 1991-10-15 | E. I. Du Pont De Nemours And Company | Multistep synthesis of hexafluoropropylene |
| US5043491A (en) * | 1989-12-19 | 1991-08-27 | E. I. Du Pont De Nemours And Company | Multistep synthesis of hexafluoropropylene |
| US5345013A (en) * | 1993-06-10 | 1994-09-06 | E. I. Du Pont De Nemours And Company | Safe handling of tetrafluoroethylene |
| US20020032356A1 (en) | 2000-07-14 | 2002-03-14 | Gelblum Peter Gideon | Synthesis of perfluoroolefins |
| KR100361585B1 (en) * | 2000-11-11 | 2002-11-22 | 한국과학기술연구원 | Preparation of Hexafluoropropylene(HFP) by the pyrolysis of trifluoromethane(R23) and tetrafluoroethylene(TFE) |
| KR100405187B1 (en) * | 2001-02-20 | 2003-11-12 | 한국과학기술연구원 | Preparation Method of Octafluorecyclobutane(RC318) |
| KR100405895B1 (en) * | 2001-02-20 | 2003-11-14 | 한국과학기술연구원 | Preparation Method of Hexafluoropropylene(HFP) and Octafluorecyclobutane(RC318) simultaneously |
| US6924403B2 (en) * | 2002-06-26 | 2005-08-02 | E. I. Du Pont De Nemours And Company | Synthesis of hexafluoropropylene |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2394581A (en) * | 1943-10-04 | 1946-02-12 | Kinetic Chemicals Inc | Pyrolysis of tetrafluoroethylene polymer |
| US2551573A (en) * | 1945-11-30 | 1951-05-08 | Du Pont | Pyrolysis of chloro-fluoro alkanes |
| US2758138A (en) * | 1954-05-06 | 1956-08-07 | Du Pont | Pyrolysis process for making perfluoropropene from tetrafluoroethylene |
| US2759983A (en) * | 1954-05-06 | 1956-08-21 | Du Pont | Pyrolysis process for preparing hexafluoropropene from tetrafluoroethylene polymer |
| US2970176A (en) * | 1957-10-31 | 1961-01-31 | Du Pont | Pyrolysis of fluorocarbons to hexafluoropropylene |
| FR1448708A (en) * | 1960-02-08 | 1966-03-18 | Pennsalt Chemicals Corp | Fluoride combination production process |
| NL269647A (en) * | 1960-09-28 | |||
| US3446858A (en) * | 1963-03-30 | 1969-05-27 | Daikin Ind Ltd | Process for the manufacture of hexafluoropropene |
| DE1519961A1 (en) * | 1965-08-17 | 1969-06-26 | Brown Boveri Krupp Reaktor | Process for removing CO2 and H2O from a gas stream |
| US3578721A (en) * | 1967-12-14 | 1971-05-11 | Du Pont | Process for reducing the formation of polymer attendant the pyrolysis of tetrafluoroethylene |
-
1972
- 1972-06-12 US US261629A patent/US3873630A/en not_active Expired - Lifetime
-
1973
- 1973-05-28 CA CA172,485A patent/CA1015771A/en not_active Expired
- 1973-06-07 JP JP6344673A patent/JPS5728696B2/ja not_active Expired
- 1973-06-08 FR FR7321021A patent/FR2187743B1/fr not_active Expired
- 1973-06-11 GB GB2771973A patent/GB1384036A/en not_active Expired
- 1973-06-11 IT IT50667/73A patent/IT989657B/en active
- 1973-06-12 NL NL7308149A patent/NL7308149A/xx unknown
- 1973-06-12 DE DE2329750A patent/DE2329750C2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2187743B1 (en) | 1977-02-11 |
| FR2187743A1 (en) | 1974-01-18 |
| DE2329750A1 (en) | 1974-01-03 |
| DE2329750C2 (en) | 1982-07-29 |
| JPS5728696B2 (en) | 1982-06-18 |
| US3873630A (en) | 1975-03-25 |
| CA1015771A (en) | 1977-08-16 |
| NL7308149A (en) | 1973-12-14 |
| JPS4948608A (en) | 1974-05-11 |
| IT989657B (en) | 1975-06-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |