GB1188636A - Pyrolysis of Tetrafluoroethylene - Google Patents
Pyrolysis of TetrafluoroethyleneInfo
- Publication number
- GB1188636A GB1188636A GB58816/68A GB5881668A GB1188636A GB 1188636 A GB1188636 A GB 1188636A GB 58816/68 A GB58816/68 A GB 58816/68A GB 5881668 A GB5881668 A GB 5881668A GB 1188636 A GB1188636 A GB 1188636A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tetrafluoroethylene
- dec
- pyrolysis
- aqueous solution
- gaseous
- 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
1,188,636. Pyrolysis process. E.I. DU PONT DE NEMOURS & CO. 11 Dec., 1968 [14 Dec., 1967], No. 68816/68. Heading C2C. Perfluorocarbons, e.g. hexafluoropropylene and octafluorocyclobutane, are obtained by pyrolysing tetrafluoroethylene and contacting the pyrolysis products, before they have cooled to a temperature at which polymerization occurs, with (a) gaseous HC1 or HF or (b) an aqueous solution of HC1 or an aqueous solution containing fluoride ions, the amount of HC1, HF or the compound fluoride ion being sufficient to suppress the formation of solid polymer. The gaseous suppressant (a) may be supplied directly by injection or it may be formed in situ by copyrolysing tetrafluoroethylene with compounds which yield HC1 or HF under the reaction conditions, e.g. chlorodifluoromethane or fluoroform.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US69039867A | 1967-12-14 | 1967-12-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1188636A true GB1188636A (en) | 1970-04-22 |
Family
ID=24772290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB58816/68A Expired GB1188636A (en) | 1967-12-14 | 1968-12-11 | Pyrolysis of Tetrafluoroethylene |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3578721A (en) |
| DE (1) | DE1814013C3 (en) |
| FR (1) | FR1596099A (en) |
| GB (1) | GB1188636A (en) |
| NL (1) | NL6817945A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4826938A (en) * | 1988-04-21 | 1989-05-02 | National Starch And Chemical Corporation | Substrates coated with pressure sensitive adhesives comprising ethylene vinyl acetate dioctyl maleate polymers |
| US4829139A (en) * | 1988-04-21 | 1989-05-09 | National Starch And Chemical Corporation | Pressure sensitive adhesives comprising ethylene vinyl acetate dioctyl maleate terpolymers |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3873630A (en) * | 1972-06-12 | 1975-03-25 | Du Pont | Process for pyrolyzing tetrafluoroethylene to hexafluoropropylene |
| KR100361585B1 (en) * | 2000-11-11 | 2002-11-22 | 한국과학기술연구원 | Preparation of Hexafluoropropylene(HFP) by the pyrolysis of trifluoromethane(R23) and tetrafluoroethylene(TFE) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL67177C (en) * | 1939-07-01 | 1900-01-01 | ||
| US2406794A (en) * | 1945-02-14 | 1946-09-03 | Kinetic Chemicals Inc | Process of separating pyrolysis products of chlorodifluoromethane |
| US2979539A (en) * | 1959-01-06 | 1961-04-11 | Minnesota Mining & Mfg | Difluorocarbene free radicals in the synthesis of fluorinated olefinic compounds |
-
1967
- 1967-12-14 US US690398A patent/US3578721A/en not_active Expired - Lifetime
-
1968
- 1968-12-11 GB GB58816/68A patent/GB1188636A/en not_active Expired
- 1968-12-11 DE DE1814013A patent/DE1814013C3/en not_active Expired
- 1968-12-13 FR FR1596099D patent/FR1596099A/fr not_active Expired
- 1968-12-13 NL NL6817945A patent/NL6817945A/xx unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4826938A (en) * | 1988-04-21 | 1989-05-02 | National Starch And Chemical Corporation | Substrates coated with pressure sensitive adhesives comprising ethylene vinyl acetate dioctyl maleate polymers |
| US4829139A (en) * | 1988-04-21 | 1989-05-09 | National Starch And Chemical Corporation | Pressure sensitive adhesives comprising ethylene vinyl acetate dioctyl maleate terpolymers |
Also Published As
| Publication number | Publication date |
|---|---|
| US3578721A (en) | 1971-05-11 |
| DE1814013A1 (en) | 1969-07-24 |
| DE1814013B2 (en) | 1976-08-19 |
| DE1814013C3 (en) | 1982-01-28 |
| NL6817945A (en) | 1969-06-17 |
| FR1596099A (en) | 1970-06-15 |
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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 |