Gas separation: processes – Selective diffusion of gases – Selective diffusion of gases through substantially solid...
Reexamination Certificate
2008-01-08
2008-01-08
Greene, Jason M. (Department: 1724)
Gas separation: processes
Selective diffusion of gases
Selective diffusion of gases through substantially solid...
C095S043000, C096S004000, C096S010000, C096S011000, C427S426000, C427S372200, C427S430100, C427S435000
Reexamination Certificate
active
07316727
ABSTRACT:
SAPO membranes and methods for their preparation and use are described. The SAPO membranes are prepared by contacting at least one surface of a porous membrane support with an aged synthesis gel. A layer of SAPO crystals is formed on at least one surface of the support. SAPO crystals may also form in the pores of the support. SAPO-34 membranes of the invention can have improved selectivity for certain gas mixtures, including mixtures of carbon dioxide and methane.
REFERENCES:
patent: 4440871 (1984-04-01), Lok et al.
patent: 5100596 (1992-03-01), Haag et al.
patent: 5362522 (1994-11-01), Barri et al.
patent: 5464798 (1995-11-01), Jia et al.
patent: 5567664 (1996-10-01), Barri et al.
patent: 5779904 (1998-07-01), Ruderman et al.
patent: 5824617 (1998-10-01), Lai
patent: 5830429 (1998-11-01), Balkus et al.
patent: 5871650 (1999-02-01), Lai et al.
patent: 6074457 (2000-06-01), Anthonis et al.
patent: 6090289 (2000-07-01), Verduijn et al.
patent: 6140263 (2000-10-01), Anstett et al.
patent: 6193784 (2001-02-01), Yazawa et al.
patent: 6472016 (2002-10-01), Soria et al.
patent: 6503294 (2003-01-01), Yoshikawa et al.
patent: 6767384 (2004-07-01), Vu et al.
patent: 1167005 (1997-12-01), None
patent: WO 94/25152 (1994-11-01), None
patent: WO 02/074421 (2002-09-01), None
patent: WO 03/048042 (2003-06-01), None
Poshuta, Joseph C., “Separation of Light Gas Mixtures Using SAPO-34 Membranes”, AIChE Journal, Apr. 2000, vol. 46, No. 4, pp. 779-789, especially 780-781.
Dyer, A. (1988),An Introduction to Zeolite Molecular Sieves, John Wiley & Sons, New York, pp. 1-3, 12-15, 20-25, 36-37, 54, 57.
Gump, C. et al. (2001), “Aromatic Permeation through Crystalline Molecular Sieve Membranes,” Ind. Eng. Chem. Res. 40(2):565-577.
Hedlund, J. et al. (2002), “High-flux MFI membranes,” Micro. and Meso. Mater. 52:179-189.
Jhung, S-H. et al. (Oct. 2003), “Selective formation of SAPO-5 and SAPO-34 molecular sieves with microwave irradiation and hydrothermal heating,” Micro. and Meso. Mater. 64:33-39.
Kärger, J. and Ruthven, J. (1992),Diffusion in Zeolites, John Wiley and Sons: New York, pp. 9-10.
Keizer et al. (1998), “Two component permeation through thin zeolite MFI membranes,” J. Memb. Sci. 147:159-172.
Li, S. et al. (Available on-line Jul. 24, 2004), “SAPO-34 membranes for CO2/CH4separation,” J. Membrane Sci. 241:121-135.
Li, S. et al. (Available on-line Dec. 2004), “Effects of impurities on CO2/CH4separations through SAPO-34 membranes,” J. Membrane Sci., pp. 59-66.
Lixiong et al. (1997), “Synthesis of SAPO-34/ceramic composite membranes,” Stud. Surf. Sci. Catal. 105:2211.
Mériaudeau, P. et al. (1997), “SAPO-11, SAPO-31, and SAPO-41 Molecular Sieves: Synthesis, Characterization, and Catalytic Properties inn-Octane Hydroisomerization,” J. Catal. 169:55-66.
Poshusta et al. (1998), “Synthesis and Permeation Properties of SAPO-34 Tubular Membranes,” Ind. Eng. Chem. Res. 37:3924-3929.
Poshusta et al. (2000), “Separation of Light Gas Mixtures Using SAPO-34 Membranes,” AIChE J. 46(4):779-789.
Poshusta, J.C. et al. (2001), “Characterization of SAPO-34 membranes by water adsorption,” J. Membrane Science 186:25-40.
Prakash, A.M. and Unnikrishnan, S. (1994), “Synthesis of SAPO-34: High Silicon Incorporation in the Presence of Morpholine as Template,” J. Chem. Soc. Faraday Trans. 90(15):2291-2296.
Recipe for SAPO-34, hppt://www.iza-synthesis.org/Recipes/SAPO-34.html, accessed Jan. 15, 2004.
Sano, T. et al. (1992), “Synthesis and characterization of polycrystalline SAPO-5 film,” J. Mol. Catal. 77:L19-L26.
Szostak, R. (1998), “Synthesis of Molecular Sieve Phosphates,” in “Recent Advances in the Understanding of Zeolit Synthesis,” inMolecular Sieves, Science and Technology, Karge, H.G. and Weitkamp, J., eds., Springer-Verlag, Berlin, pp. 161-165.
Thompson, R.W. (1998) “Recent Advances in the Understanding of Zeolite Synthesis,” inMolecular Sieves, Science and Technology, Karge, H.G. and Weitkamp, J., eds., Springer-Verlag, Berlin, pp. 19-31.
Tsai, T.-G. et al. (1998), “Well-aligned SAPO-5 membrane: preparation and characterization,” Micropor. Mesopor. 22:333-341.
Kang et al. (2002) “Intrapore Synthesis of Silicalite Membranes at Temperatures Below 100° C.,”Ind. Eng. Chem. Res. 41:3145-3150.
Supplementary European Search Report corresponding to European application No. EP 05 72 5632, completed on May 4, 2007.
Falconer John L.
Li Shiguang
Noble Richard D.
Greene Jason M.
Greenlee Winner and Sullivan P.C.
The Regents of the University of Colorado
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