Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Halogen or compound containing same
Reexamination Certificate
2007-05-15
2007-05-15
Lorengo, J. A. (Department: 1755)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Halogen or compound containing same
C502S305000, C502S319000
Reexamination Certificate
active
10523228
ABSTRACT:
A crystalline alpha-chromium oxide where from about 0.05 atom % to about 6 atom % of the chromium atoms in the alpha-chromium oxide lattice are replaced by trivalent cobalt (Co+3) atoms is disclosed. Also disclosed is a chromium-containing catalyst composition comprising as a chromium-containing component the crystalline cobalt-substituted alpha-chromium oxide; and a method for preparing a composition comprising the crystalline cobalt-substituted alpha-chromium oxide. The method involves (a) co-precipitating a solid by adding ammonium hydroxide to an aqueous solution of a soluble cobalt salt and a soluble trivalent chromium salt that contains at least three moles of nitrate per mole of chromium in the solution and has a cobalt concentration of from about 0.05 mole % to about 6 mole % of the total concentration of cobalt and chromium in the solution; and after at least three moles E of ammonium per mole of chromium in the solution has been added to the solution, (b) collecting the co-precipitated solid formed in (a); (c) drying the collected solid; and (d) calcining the dried solid. Also disclosed is a chromium-containing catalyst composition comprising a chromium-containing component prepared by treating the crystalline cobalt-substituted alpha-chromium oxide with a fluorinating agent; and a process for changing the fluorine distribution (i.e., content and/or arrangement) in a hydrocarbon or halogenated hydrocarbon in the presence of a catalyst. The process involves using as the catalyst a composition comprising the crystalline cobalt-substituted alpha-chromium oxide and/or the treated cobalt-substituted alpha-chromium oxide.
REFERENCES:
patent: 3258500 (1966-06-01), Swamer et al.
patent: 3873471 (1975-03-01), Koberstein et al.
patent: 3978145 (1976-08-01), Knaak
patent: 3992325 (1976-11-01), Knaak
patent: 4843181 (1989-06-01), Gumprecht et al.
patent: 5036036 (1991-07-01), Lerou
patent: 5057634 (1991-10-01), Webster et al.
patent: 5155082 (1992-10-01), Tung et al.
patent: 5177273 (1993-01-01), Bruhnke et al.
patent: 5185482 (1993-02-01), Manzer et al.
patent: 5345017 (1994-09-01), Rao et al.
patent: 5446215 (1995-08-01), Cook et al.
patent: 5463151 (1995-10-01), Cuzzato et al.
patent: 5494873 (1996-02-01), Tsuji et al.
patent: 5559069 (1996-09-01), Rao et al.
patent: 5763698 (1998-06-01), Manzer et al.
patent: 6274780 (2001-08-01), Rao et al.
patent: 6403524 (2002-06-01), Scott et al.
patent: 6503865 (2003-01-01), Kanemura et al.
patent: 6706935 (2004-03-01), Manzer et al.
patent: 2001/0011061 (2001-08-01), Scott et al.
patent: 2002/0006374 (2002-01-01), Kourtakis et al.
patent: A-29972/92 (1993-06-01), None
patent: A-80340/94 (1995-06-01), None
patent: 1048699 (1991-01-01), None
patent: 1059334 (1992-03-01), None
patent: 0365296 (1990-04-01), None
patent: 0 486 333 (1992-05-01), None
patent: 0 641 598 (1995-03-01), None
patent: 1 038 858 (2000-09-01), None
patent: 04-262372 (1992-09-01), None
patent: WO 92/02476 (1992-02-01), None
patent: WO 2004/018095 (2004-03-01), None
patent: WO 2004/018396 (2004-03-01), None
patent: WO 2004/018397 (2004-03-01), None
U.S. Appl. No. 10/523,227, filed Jan. 31, 2005, Nappa et al.
U.S. Appl. No. 10/523,223, filed Jan. 31, 2005, Rao et al.
U.S. Appl. No. 10/523,226, filed Jan. 31, 2005, Nappa et al.
Music et. al., Formation and Characterization of the Solid Solutions, J. Materials Science, 1996, pp. 4067-4076, vol. 31.
Chemical Abstract vol. 118:9 397, vol. 118, p. 138 (1993).
Rao Velliyur Nott Mallikarjuna
Rosenfeld H. David
Sievert Allen C.
Subramanian Munirpallam Appadorai
Subramoney Shekhar
E. I. du Pont de Nemours and Company
Hailey Patricia L.
Lorengo J. A.
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