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GB1361341A - Method for the depolymerisation of polytetrafluoroethylene - Google Patents

Method for the depolymerisation of polytetrafluoroethylene

Info

Publication number
GB1361341A
GB1361341A GB61872A GB61872A GB1361341A GB 1361341 A GB1361341 A GB 1361341A GB 61872 A GB61872 A GB 61872A GB 61872 A GB61872 A GB 61872A GB 1361341 A GB1361341 A GB 1361341A
Authority
GB
United Kingdom
Prior art keywords
tetrafluorethylene
steam
polymer
depolymerisation
polytetrafluoroethylene
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
GB61872A
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.)
Liquid Nitrogen Processing Corp
Original Assignee
Liquid Nitrogen Processing Corp
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 Liquid Nitrogen Processing Corp filed Critical Liquid Nitrogen Processing Corp
Publication of GB1361341A publication Critical patent/GB1361341A/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
    • C07C17/361—Preparation of halogenated hydrocarbons by reactions involving a decrease in the number of carbon atoms
    • C07C17/367—Preparation of halogenated hydrocarbons by reactions involving a decrease in the number of carbon atoms by depolymerisation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

1361341 Tetrafluorethylene LIQUID NITROGEN PROCESSING CORP 6 Jan 1972 [2 Feb 1971] 618/72 Heading C2C Tetrafluorethylene is prepared by heating polymeric tetrafluorethylene in the presence of steam having a temperature of at least 950‹ F., to above the decomposition temperature of the polymer. The mole ratio of steam to the pyrolysis products is at least one to one, preferably between ten to one and forty to one, and the polymer is preferably heated to between 800‹ F. and 1100‹ F. The pyrolysis may be in an insulated vessel or tube.
GB61872A 1971-02-02 1972-01-06 Method for the depolymerisation of polytetrafluoroethylene Expired GB1361341A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00111963A US3832411A (en) 1971-02-02 1971-02-02 Method for the depolymerization of polytetrafluoroethylene

Publications (1)

Publication Number Publication Date
GB1361341A true GB1361341A (en) 1974-07-24

Family

ID=22341390

Family Applications (1)

Application Number Title Priority Date Filing Date
GB61872A Expired GB1361341A (en) 1971-02-02 1972-01-06 Method for the depolymerisation of polytetrafluoroethylene

Country Status (6)

Country Link
US (1) US3832411A (en)
JP (1) JPS5238525B1 (en)
DE (1) DE2204141B2 (en)
FR (1) FR2124212B1 (en)
GB (1) GB1361341A (en)
IT (1) IT948929B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4128589A (en) * 1977-06-22 1978-12-05 Hughes Aircraft Company Generation of CF4 from Teflon for reactive atmosphere processing and growth of metal fluorides
DE4334015A1 (en) * 1993-10-06 1995-04-13 Hoechst Ag Process for the preparation of fluorinated monomers
RU2082709C1 (en) * 1994-05-19 1997-06-27 Научно-внедренческая фирма "Поликом, Инк" Method and installation for producing monomer via pyrolytic decomposition of corresponding polymer
CN1323993C (en) * 2002-03-01 2007-07-04 大金工业株式会社 Process for producing fluoromonomer
US6919015B2 (en) * 2002-12-16 2005-07-19 3M Innovative Properties Company Process for manufacturing fluoroolefins
GB0817873D0 (en) * 2008-10-01 2008-11-05 3M Innovative Properties Co Process of making fluoroelefins by thermal decomposition of fluorinated materials
RU2469056C1 (en) * 2011-06-16 2012-12-10 Государственное образовательное учреждение высшего профессионального образования "Национальный исследовательский Томский политехнический университет" Method of producing composite material based on polytetrafluoroethylene and silicon dioxide
RU2497846C1 (en) * 2012-04-24 2013-11-10 Федеральное государственное бюджетное учреждение науки Байкальский институт природопользования Сибирского отделения Российской академии наук (БИП СО РАН) Method of recycling polytetrafluoroethylene wastes
RU2656488C1 (en) * 2017-05-03 2018-06-05 Общество с ограниченной ответственностью "Малое инновационное предприятие "Байкальский научный центр прочности" Method of recycling polytetrafluoroethylene wastes
US20230002297A1 (en) 2019-12-23 2023-01-05 3M Innovative Properties Company Process of Making Fluoroolefins by Thermal Decomposition of Fluorinated Ionomers

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2394581A (en) * 1943-10-04 1946-02-12 Kinetic Chemicals Inc Pyrolysis of tetrafluoroethylene polymer
US2406153A (en) * 1944-06-23 1946-08-20 Du Pont Depolymerization of polymeric tetrafluoroethylene
DE1003700B (en) * 1954-07-30 1957-03-07 Hoechst Ag Process for the production of low molecular weight chlorofluorocarbons with a liquid or waxy consistency
NL288069A (en) * 1962-01-24
GB1041592A (en) * 1962-02-21 1966-09-07 Daikin Ind Ltd Apparatus for the pyrolysis of chlorodifluoromethane

Also Published As

Publication number Publication date
FR2124212A1 (en) 1972-09-22
DE2204141B2 (en) 1974-05-30
IT948929B (en) 1973-06-11
US3832411A (en) 1974-08-27
JPS5238525B1 (en) 1977-09-29
DE2204141A1 (en) 1972-08-17
FR2124212B1 (en) 1973-11-23

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees