Title:
CHEMICAL RECYCLING PROCESS
Document Type and Number:
WIPO Patent Application WO/2004/103938
Kind Code:
A1
Abstract:
Provided is a chemical recycling technique by which low -molecular tetrafluoroethylene monomer and dimer can be recovered from PTFE-containing materials without troubles due to the use of steam. A chemical recycling process for recovering low-molecular tetrafluoroethylene monomer and dimer from a PTFE-containing material through thermal cracking, which comprises feeding a PTFE-containing material into a fluidized bed reactor containing therein a fluidized bed made of an inert particulate material, heating the resulting system, introducing nitrogen gas as the fluidizing gas into the reactor, and taking low-molecular tetrafluoroethylene monomer and dimer formed by the thermal cracking of PTFE out of the reactor together with the nitrogen gas.
Inventors:
TOYODA HIROSHI (JP)
YAMAMOTO MASAHIDE (JP)
KAMINSKY WALTER (DE)
YAMAMOTO MASAHIDE (JP)
KAMINSKY WALTER (DE)
Application Number:
PCT/JP2004/007058
Publication Date:
December 02, 2004
Filing Date:
May 18, 2004
Export Citation:
Assignee:
TAIYO KOGYO CO LTD (JP)
TOYODA HIROSHI (JP)
YAMAMOTO MASAHIDE (JP)
KAMINSKY WALTER (DE)
TOYODA HIROSHI (JP)
YAMAMOTO MASAHIDE (JP)
KAMINSKY WALTER (DE)
International Classes:
C08J11/12; C07C17/367; C07C21/185; C07C23/06; C08J11/14; C10G9/32; (IPC1-7): C07C17/367; B09B3/00; C07C21/185; C07C23/06; C08J11/12
Foreign References:
| JPH07188073A | 1995-07-25 |
Other References:
SIMON C.M. AND KAMINSKY W.: "Chemical recycling of polytetrafluoroethylene by pyrolysis", POLYMER DEGRADATION AND STABILITY, vol. 62, no. 1, 1998, pages 1 - 7, XP004294510
Attorney, Agent or Firm:
Muramatsu, Yoshihito (22-7 Shiba 3-chom, Minato-ku Tokyo, JP)
Download PDF:
Previous Patent: METHOD FOR OBTAINING CRUDE 1,3-BUTADIENE FROM A C4 FRACTION
Next Patent: ASSAY METHOD AND APPARATUS
Next Patent: ASSAY METHOD AND APPARATUS