PROCESS FOR PREPARATION OF 1,1-DICHLORO-2,2,3,3,3-PENTA- FLUOROPROPANE

WIPO Patent Application WO/2011/162335

A1

Provided is a process for preparing an isomer mixture rich in 1,1-dichloro-2,2,3,3,3-pentafluoropropane (HCFC-225ca) which is useful as a starting chemical in preparing 1,1-dichloro -2,3,3,3-tetrafluoropropene (CFO-1214ya), or the like. The process is characterized by subjecting a raw material consisting of dichloropentafluoropropanes (HCFC-225) that contain 2,2-dicloro-1,1,1,3,3-pentafluoropropane (HCFC-225aa) to gas-phase isomerization at a temperature of 290°C or lower in the presence of a metal oxide catalyst to isomerize HCFC-225aa into HCFC-225ca.

OKAMOTO HIDEKAZU (JP)

PCT/JP2011/064421

December 29, 2011

June 23, 2011

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ASAHI GLASS CO LTD (JP)
OKAMOTO HIDEKAZU (JP)

C07C17/358; C07C19/10; C07B61/00

WO2010082662A1	2010-07-22
WO2010074254A1	2010-07-01

JPH08169850A	1996-07-02
JP2010510221A	2010-04-02
JPH0558924A	1993-03-09
US5157171A	1992-10-20
JP2010142278A	2010-06-23

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SENMYO, Kenji et al. (JP)
Spring name Kenji (JP)

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