Compositions – Gaseous compositions – Carbon-oxide and hydrogen containing
Reexamination Certificate
2006-08-29
2006-08-29
Silverman, Stanley (Department: 1754)
Compositions
Gaseous compositions
Carbon-oxide and hydrogen containing
C423S418200, C423S648100, C423S650000, C423S651000, C502S325000
Reexamination Certificate
active
07097786
ABSTRACT:
Rhodium-spinel catalysts with activity for efficiently catalyzing the net partial oxidation of methane at high selectivities for CO and H2products are disclosed, along with their method of making. A syngas production process employing such catalysts for the net catalytic partial oxidation of a C1-C5hydrocarbon (e.g., natural gas or methane) to a product gas mixture comprising CO and H2is also disclosed. Preferred reaction conditions include maintaining the catalyst at a temperature of about 400-1,200° C., superatmospheric pressure, and flow rate sufficient to pass the reactant gas mixture over the catalyst at space velocities of at least about 100,000-25,000,000 hr−1.
REFERENCES:
patent: 4088608 (1978-05-01), Tanaka et al.
patent: 4274981 (1981-06-01), Suzuki et al.
patent: 4690777 (1987-09-01), Valenyi
patent: 4877550 (1989-10-01), Goetsch
patent: 5025109 (1991-06-01), DeCaul
patent: 5105044 (1992-04-01), Han
patent: 5149464 (1992-09-01), Green
patent: 5238898 (1993-08-01), Han
patent: 5338488 (1994-08-01), Choudhary
patent: 5447705 (1995-09-01), Petit
patent: 5500149 (1996-03-01), Green
patent: 5510056 (1996-04-01), Jacobs
patent: 5614163 (1997-03-01), Bhattacharyya et al.
patent: 5648582 (1997-07-01), Schmidt
patent: 5653774 (1997-08-01), Bhattacharyya
patent: 5744419 (1998-04-01), Choudhary et al.
patent: 6284217 (2001-09-01), Wang
patent: 6409940 (2002-06-01), Gaffney et al.
patent: 303438 (1988-08-01), None
patent: 0640561 (1994-08-01), None
patent: 2247465 (1992-03-01), None
patent: WO94/14700 (1994-07-01), None
patent: WO 01/12540 (2001-02-01), None
D.D. Beck, T.W. Capehart, C. Wong, and D.N. Belton,XAFS Characterization of Rh/Al2O3after Treatment in High-Temperature Oxidizing Environments, Academic Press, Inc., J. Catal. (Apr. 1993) 144:311-324.
Ismunandar, Brendan J. Kennedy, and Brett A. Hunter,Phase Transformation in CuRh2O4: A Powder Neutron Diffraction Study, Elsevier Science Ltd., Materials Research Bulletin (1999) 34(1):135-143.
K.S.R.C. Murthy and J. Ghose,Electrical Studies on CuRh2O4, Academic Press Inc., J. of Solid State Chemistry (Feb. 1987) 71:441-443.
H.C. Yao, S. Japar, and M. Shelef, ,Surface Interactions in the System Rh/Al2O3, Academic Press, Inc., J. Catal. (Aug. 1977) 50:407-418.
Nalini Padmanaban, B.N. Avasthi, and J. Ghose,Solid State Studies on Rhodium-Substituted CuCr2O4Spinel Oxide, Academic Press, Inc., J. of Solid State Chemistry (Jan. 1990) 86:286-292.
V. R. Choudhary, et al.;Oxidative Conversion of Methane to Syngas over Nickel Supported on Commercial Low Surface Area Porous Catalyst Carriers Precoated with Alkaline and Rare Earth Oxides; J Catal. 172: 281-293 (1997).
Patrick D.F. Vernon, et al.;Partial Oxidation of Methane to Synthesis Gas; Catalysis Letters 6 (1990) 181-186.
Jacob A. Moulijn, et al.;Transformation of a Structured Carrier into Structured Catalyst; Structured Catalysts and Reactors; Marcel Dekker, Inc.; p. 599-615; 1998.
PCT Search Report in PCT/US02/04813 dated Jul. 17, 2002.
Dindi Hasan
Herron Norman
Manogue William
Niu Tianyan
Conley & Rose, P.C.
ConocoPhillips Company
Silverman Stanley
Strickland Jonas
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