METHOD FOR PURIFYING 1,1,1,3,3-PENTAFLUOROPROPANE

Title:

METHOD FOR PURIFYING 1,1,1,3,3-PENTAFLUOROPROPANE

Document Type and Number:

WIPO Patent Application WO/1997/049656

Kind Code:

A1

Abstract:

A method for purifying 1,1,1,3,3-pentafluoropropane (HFC-245fa) by bringing at least one extractant selected from the group consisting of: (a) compounds represented by general formula (I): CxFyHz, compounds represented by general formula (II): R1R2R3N, compounds represented by general formula (III): R4OR5, and compounds represented by general formula (IV): C1ClmHn into contact with a mixture comprising HFC-245fa and HF, subjecting the resultant liquid mixture to liquid-liquid separation to provide an extractant phase composed mainly of HFC-245fa and the extractant, and separating HFC-245fa from the extractant phase. According to this method, HFC-245fa can be efficiently separated from a mixture comprising HFC-245fa and HF.

Inventors:

KITANO KEISUKE (JP)
NAKADA TATSUO (JP)
SHIBANUMA TAKASHI (JP)

Application Number:

PCT/JP1997/002102

Publication Date:

December 31, 1997

Filing Date:

June 19, 1997

Export Citation:

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Assignee:

DAIKIN IND LTD (JP)
KITANO KEISUKE (JP)
NAKADA TATSUO (JP)
SHIBANUMA TAKASHI (JP)

International Classes:

C07C17/20; C07C17/38; C07C19/08; (IPC1-7): C07C19/08; C07C17/38; C07C17/20

Foreign References:

JPH08104655A	1996-04-23
JPH08239334A	1996-09-17
JPH092983A	1997-01-07
JPH09110738A	1997-04-28

Other References: