Purification of fluorinated alcohols

Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing

Reexamination Certificate

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Reexamination Certificate

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07138551

ABSTRACT:
A process for reducing the level of perfluoroalkanoic acids, perfluoroalkanoic esters, and perfluoroalkyliodides in fluorinated alcohols comprising heating a fluorinated alcohol, or mixtures thereof, containing said acids, esters, or iodides to a temperature of at least 175° C. in the presence of water and a base additive is disclosed.

REFERENCES:
patent: 3532659 (1970-10-01), Hager et al.
patent: 5442097 (1995-08-01), Obermeier et al.
patent: 5591877 (1997-01-01), Obermeier et al.
patent: 5817284 (1998-10-01), Nakano et al.
patent: 5990330 (1999-11-01), Sulzbach et al.
patent: 6069291 (2000-05-01), Rossin et al.
patent: 6245923 (2001-06-01), Sulzbach et al.
patent: 6563011 (2003-05-01), Atobe et al.
patent: 2001/0009652 (2001-07-01), Arno
patent: 2001/0025017 (2001-09-01), Amemiya et al.
patent: 2002/0131912 (2002-09-01), Tamata et al.
patent: 2003/0026743 (2003-02-01), Imamura
patent: 2003/0220442 (2003-11-01), Epsch et al.
patent: 2004/0016343 (2004-01-01), Ferrero et al.
patent: 2004/0084296 (2004-05-01), Hori et al.
patent: 1341478 (2002-03-01), None
patent: 0 194 690 (1985-03-01), None
patent: 0 247 614 (1987-02-01), None
patent: 0 355 787 (1990-02-01), None
patent: 0 663 233 (1998-08-01), None
patent: 1 070 728 (2001-01-01), None
patent: 0 1 070 723 (2003-11-01), None
patent: 1999179201 (1999-07-01), None
patent: 2000126598 (2000-05-01), None
patent: 2000342931 (2000-12-01), None
patent: 2003267900 (2002-09-01), None
patent: 2015954 (1994-07-01), None
patent: 568 602 (1977-05-01), None
patent: WO 98/01217 (1998-01-01), None
patent: WO 2002/044297 (2002-06-01), None
patent: WO 2004/050719 (2004-06-01), None
Brace (Journal of Fluorine Chemistry, 20 (1982) 313-327, 1981).
Tiers, George Van Dyke: “Preparation of acyl halides and esters from salts of perfluoroalkanoic acids”, Journal of Organic Chemistry, 29(7), 2038-9 Coden: Joceah; ISSN: 0022-3263, 1964, XP002381483; pp. 15-26.
Chambers R D: Reactions of Perfluoroalkanoic Acids and Derivatives: Fluorine in Organic Chemistry, 1973, pp. 211-212, XP009033576, Wiley-Interscience Publication; John Wiley & Sons, entire document.
Brace N O: “Some Approach to the Syntnesis (sic) of Fluorinated Alcohols and Esters. II. USR of F, Alkyl Iodides for the Synthesis of F-Alkyl Alkanols”, Journal of Fluorine Chemistry, Elsevier, Amsterdam, NL, vol. 20, 1982, pp. 313-327, XP0000942667 ISSN: 0022-1139, p. 313. “Summary”; p. 314, first and last paragraph; p. 315, Chart I.

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