Vapor phase production of 1,1,1,2,3,3,3-heptafluoropropane...

Details Vapor phase production of 1,1,1,2,3,3,3-heptafluoropropane... Vapor phase production of 1,1,1,2,3,3,3-heptafluoropropane...

2005-05-31

2005-05-31

Price, Elvis O. (Department: 1621)

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

Organic compounds

Halogen containing

C570S134000, C570S136000, C570S123000, C570S124000, C570S177000, C570S178000, C570S166000, C570S167000, C570S168000, C570S169000

Reexamination Certificate

active

06900362

ABSTRACT:
A process for the production of HFC-227ea from HF and HFP is provided. This process takes advantage of an azeotropic composition of HF and HFC-227ea in order to produce HFC-227ea essentially free of HF and recycle unreacted HF back to the reactor. The recycle of said azeotropic composition, also allows the use of HFC-227ea as a diluent to aid in control of reactor temperature for a highly exothermic reaction.

REFERENCES:
patent: 5689019 (1997-11-01), Aoyama et al.
patent: 6407297 (2002-06-01), Ewing
patent: WO 9837043 (1998-08-01), None
patent: WO 9906342 (1999-02-01), None
patent: WO 9926907 (1999-06-01), None

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