GB620296A - Stabilisation of tetrafluoroethylene - Google Patents

Stabilisation of tetrafluoroethylene

Info

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
Application number
GB2696/44A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB620296A publication Critical patent/GB620296A/en
Expired legal-status Critical Current

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.
GB2696/44A 1943-02-15 1944-02-14 Stabilisation of tetrafluoroethylene Expired GB620296A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (5)

* Cited by examiner, † Cited by third party
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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