GB620296A - Stabilisation of tetrafluoroethylene - Google Patents
Stabilisation of tetrafluoroethyleneInfo
- Publication number
- GB620296A GB620296A GB2696/44A GB269644A GB620296A GB 620296 A GB620296 A GB 620296A GB 2696/44 A GB2696/44 A GB 2696/44A GB 269644 A GB269644 A GB 269644A GB 620296 A GB620296 A GB 620296A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tetrafluorethylene
- compounds containing
- oxygen
- compounds
- acids
- 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
- C07C17/38—Separation; Purification; Stabilisation; Use of additives
- C07C17/42—Use of additives, e.g. for stabilisation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The stability of tetrafluorethylene, containing small amounts of free oxygen, against spontaneous polymerization is improved by reducing the oxygen content to not more than 40 parts per million, preferably to 20 parts per million. The oxygen content is reduced by subjecting tetrafluorethylene to fractional distillation and discarding the oxygen-rich fraction or by treatment with a compound which reacts with free oxygen. Inorganic compounds which may be used include silver and chromous salts. Organic compounds, which are preferred to be used, include those containing a multiple bonded carbon atom, for example: (1) compounds containing ethylenic linkages such as hexenes, octenes, vinyl cyclohexene, cyclohexene, unsaturated acids like naphthenic, methacrylic, crotonic, undecylenic acids and their esters, amides and salts, allyl alcohol, cinnamyl alcohol, acrolein and dioxene. (2) Compounds containing acetylenic linkages: pentine, propiolic acid, mono and divinyl acetylenes. (3) Compounds containing aldehydic groups: formaldehyde, acetaldehyde, benzaldehyde, &c. (4) Compounds containing a multiple bonded carbon atom not attached to a hydrogen atom are particularly valuable: methacrylic acids, a -pinene, tetrahydronaphthalene, dipentene and terpineol. In the examples, samples of tetrafluorethylene are subjected to tests, with and without stabilizers, and the results are compared. The stabilizers used are Terpene B, tetrahydronaphthalene, benzaldehyde, octene-1, methylmethacrylate, cobalt naphthenate and a -pinene.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US620296XA | 1943-02-15 | 1943-02-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB620296A true GB620296A (en) | 1949-03-23 |
Family
ID=22039765
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2696/44A Expired GB620296A (en) | 1943-02-15 | 1944-02-14 | Stabilisation of tetrafluoroethylene |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB620296A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2737532A (en) * | 1953-02-17 | 1956-03-06 | Columbia Southern Chem Corp | Stabilization of perchloroethylene with alkoxyalkylnitriles |
DE1038035B (en) * | 1953-09-25 | 1958-09-04 | Diamond Alkali Co | Stabilization of technical tetrachlorethylene |
DE1041034B (en) * | 1954-07-26 | 1958-10-16 | Diamond Alkali Co | Stabilizers for low molecular weight aliphatic chlorinated hydrocarbons against decomposition |
DE1041035B (en) * | 1954-07-26 | 1958-10-16 | Diamond Alkali Co | Stabilizers for low molecular weight aliphatic chlorinated hydrocarbons against decomposition |
DE1053496B (en) * | 1954-08-09 | 1959-03-26 | Diamond Alkali Co | Stabilization of the chlorination products of low aliphatic hydrocarbons |
-
1944
- 1944-02-14 GB GB2696/44A patent/GB620296A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2737532A (en) * | 1953-02-17 | 1956-03-06 | Columbia Southern Chem Corp | Stabilization of perchloroethylene with alkoxyalkylnitriles |
DE1038035B (en) * | 1953-09-25 | 1958-09-04 | Diamond Alkali Co | Stabilization of technical tetrachlorethylene |
DE1041034B (en) * | 1954-07-26 | 1958-10-16 | Diamond Alkali Co | Stabilizers for low molecular weight aliphatic chlorinated hydrocarbons against decomposition |
DE1041035B (en) * | 1954-07-26 | 1958-10-16 | Diamond Alkali Co | Stabilizers for low molecular weight aliphatic chlorinated hydrocarbons against decomposition |
DE1053496B (en) * | 1954-08-09 | 1959-03-26 | Diamond Alkali Co | Stabilization of the chlorination products of low aliphatic hydrocarbons |
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