Process for the obtention of purified heptafluoropropane

Details Process for the obtention of purified heptafluoropropane Process for the obtention of purified heptafluoropropane

2007-07-24

2008-12-02

Parsa, Jafar (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Halogen containing

C570S176000, C570S177000

Reexamination Certificate

active

07459591

ABSTRACT:
Process for the obtention of HFC-227ea having a reduced content of organic impurities, comprising at least subjecting a crude HFC-227ea to two distillation steps at different pressures.

REFERENCES:
patent: 5475169 (1995-12-01), Hopp et al.
patent: 5918481 (1999-07-01), Pham et al.
patent: 0 512 502 (1992-11-01), None
patent: WO-98/37043 (1998-08-01), None
patent: WO-99/26907 (1999-06-01), None
patent: WO-01/66498 (2001-09-01), None

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