Title:
METHOD FOR PURIFYING TETRACHLOROETHYLENE AND PROCESS FOR PRODUCING HYDROFLUOROCARBONS
Document Type and Number:
WIPO Patent Application WO2003004445
Kind Code:
A3
Abstract:
Tetrachloroethylene containing a stabilizer is contacted with a zeolite having an average pore size of 3.4 to 11 and/or a carbonaceous adsorbent having an average pore size of 3.4 to 11 in a liquid phase to obtain a high purity tetrachloroethylene. A halogenated alkene and/or a halogenated alkane are reacted with hydrogen fluoride in the presence of a fluorination catalyst to produce a first hydrofluorocarbon, a halogenated alkene and/or a halogenated alkane are reacted with hydrogen fluoride in the presence of a fluorination catalyst to produce a second hydrofluorocarbon, and the products are joined and then distilled to obtain the first and second hydrofluorocarbons.
Inventors:
OHNO HIROMOTO (JP)
OHI TOSHIO (JP)
MIYAMURA MAKOTO (JP)
OHI TOSHIO (JP)
MIYAMURA MAKOTO (JP)
Application Number:
PCT/JP2002/006860
Publication Date:
August 28, 2003
Filing Date:
July 05, 2002
Export Citation:
Assignee:
SHOWA DENKO KK (JP)
OHNO HIROMOTO (JP)
OHI TOSHIO (JP)
MIYAMURA MAKOTO (JP)
OHNO HIROMOTO (JP)
OHI TOSHIO (JP)
MIYAMURA MAKOTO (JP)
International Classes:
C07C17/20; C07C17/21; C07C17/38; C07C17/389; C07C19/08; (IPC1-7): C07C17/389; C07C21/12; C07C17/20; C07C17/21; C07C17/08; C07C17/12
Domestic Patent References:
| WO1993025505A1 | 1993-12-23 |
Foreign References:
| EP0687660A1 | 1995-12-20 | |||
| EP0101047A1 | 1984-02-22 | |||
| US3751494A | 1973-08-07 | |||
| US4765876A | 1988-08-23 | |||
| US5959166A | 1999-09-28 | |||
| EP0648726A2 | 1995-04-19 |
Other References:
DATABASE WPI Section Ch Week 199348, Derwent World Patents Index; Class E14, AN 1993-383008, XP002221444
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 02 31 March 1995 (1995-03-31)
DATABASE CA [online] CHEMICAL ABSTRACTS SERVICE, COLUMBUS, OHIO, US; SATAKE, YUKIHIRO ET AL: "Solvent recovery by activated carbon fiber", XP002221443, retrieved from STN Database accession no. 109:95073 CA
DATABASE WPI Section Ch Week 199812, Derwent World Patents Index; Class E16, AN 1998-126108, XP002231084
DATABASE WPI Section Ch Week 199607, Derwent World Patents Index; Class E16, AN 1996-065445, XP002231085
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 02 31 March 1995 (1995-03-31)
DATABASE CA [online] CHEMICAL ABSTRACTS SERVICE, COLUMBUS, OHIO, US; SATAKE, YUKIHIRO ET AL: "Solvent recovery by activated carbon fiber", XP002221443, retrieved from STN Database accession no. 109:95073 CA
DATABASE WPI Section Ch Week 199812, Derwent World Patents Index; Class E16, AN 1998-126108, XP002231084
DATABASE WPI Section Ch Week 199607, Derwent World Patents Index; Class E16, AN 1996-065445, XP002231085
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