Organic compounds -- part of the class 532-570 series – Organic compounds – Halogen containing
Reexamination Certificate
2006-08-04
2010-02-09
Parsa, Jafar (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Halogen containing
C570S161000, C570S176000
Reexamination Certificate
active
07659435
ABSTRACT:
A process is disclosed for the manufacture of CF3CH2CHF2and CF3CHFCH2F. The process involves (a) reacting hydrogen fluoride, chlorine, and at least one halopropene of the formula CX3CCl═CClX (where each X is independently F or Cl) to produce a product including both CF3CCl2CClF2and CF3CClFCCl2F; (b) reacting CF3CCl2CClF2and CF3CClFCCl2F produced in (a) with hydrogen to produce a product including both CF3CH2CHF2, and CF3CHFCH2F; and (c) recovering CF3CH2CHF2and CF3CHFCH2F from the product produced in (b). In (a), the CF3CCl2CF3and CF3CClFCClF2are produced in the presence of a chlorofluorination catalyst including (i) a crystalline alpha-chromium oxide where at least 0.05 atom % of the chromium atoms in the alpha-chromium oxide lattice are replaced by divalent copper, and/or (ii) a chromium-containing composition of (i) which has been treated with a fluorinating agent.
REFERENCES:
patent: 5565497 (1996-10-01), Godbey et al.
patent: 7074973 (2006-07-01), Nappa et al.
patent: 7129383 (2006-10-01), Nappa et al.
patent: 7217678 (2007-05-01), Rao et al.
patent: 7285690 (2007-10-01), Rao et al.
patent: 7285691 (2007-10-01), Rao et al.
patent: 7285692 (2007-10-01), Rao et al.
patent: 7435700 (2008-10-01), Amos et al.
patent: 2005/0227865 (2005-10-01), Nappa et al.
patent: 2009/0043138 (2009-02-01), Rao et al.
patent: WO2005/037743 (2005-04-01), None
patent: WO2007/019354 (2007-02-01), None
patent: WO2007/019355 (2007-02-01), None
patent: WO2007/019356 (2007-02-01), None
patent: WO2007/019357 (2007-02-01), None
patent: WO2007/019358 (2007-02-01), None
patent: WO2007/019359 (2007-02-01), None
U.S. Appl. No. 11/988,256, filed Feb. 15, 2007, Rao et al.
U.S. Appl. No. 11/988,436, filed Feb. 15, 2007, Rao et al.
U.S. Appl. No. 11/988,259, filed Feb. 15, 2007, Rao et al.
U.S. Appl. No. 11/988,258, filed Feb. 15, 2007, Rao et al.
U.S. Appl. No. 11/988,257, filed Feb. 15, 2007, Rao et al.
U.S. Appl. No. 11/988,983, filed Feb. 15, 2007, Rao et al.
Rao Velliyur Nott Mallikarjuna
Rosenfeld H. David
Sievert Allen Capron
Subramoney Shekhar
E.I. du Pont de Nemours and Company
Parsa Jafar
LandOfFree
Process for the preparation of 1,1,1,3,3-pentafluoropropane... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for the preparation of 1,1,1,3,3-pentafluoropropane..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of 1,1,1,3,3-pentafluoropropane... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4191476