Gas separation: apparatus – Apparatus for selective diffusion of gases – Plural layers
Reexamination Certificate
2007-07-24
2007-07-24
Greene, Jason M. (Department: 1724)
Gas separation: apparatus
Apparatus for selective diffusion of gases
Plural layers
C096S010000, C096S011000, C096S012000, C096S014000, C055S524000, C055SDIG007
Reexamination Certificate
active
11149683
ABSTRACT:
A composition of and a method of making high performance hollow fiber membranes is described. The membranes have a high resistance to plasticization by use of a predetermined amount of crosslinking. The preferred polymer material for the membrane is a polyimide polymer comprising covalently bonded ester crosslinks. The resultant hollow fiber membrane exhibits a high permeability of CO2in combination with a high CO2/CH4selectivity. Another embodiment provides a method of making the hollow fiber membrane from a monesterified polymer followed by final crosslinking after hollow fiber formation.
REFERENCES:
patent: 3567632 (1971-03-01), Richter et al.
patent: 4181675 (1980-01-01), Makin et al.
patent: 4230463 (1980-10-01), Henis et al.
patent: 4427419 (1984-01-01), Li
patent: 4474858 (1984-10-01), Makino et al.
patent: 4512893 (1985-04-01), Makino et al.
patent: 4690873 (1987-09-01), Makino et al.
patent: 4705540 (1987-11-01), Hayes
patent: 4717393 (1988-01-01), Hayes
patent: 4717394 (1988-01-01), Hayes
patent: 4728345 (1988-03-01), Murphy
patent: 4740219 (1988-04-01), Kulprathipanja et al.
patent: 4838900 (1989-06-01), Hayes
patent: 4857079 (1989-08-01), Kimura
patent: 4880442 (1989-11-01), Hayes
patent: 4925459 (1990-05-01), Rojey et al.
patent: 4952220 (1990-08-01), Langsam et al.
patent: 5085676 (1992-02-01), Ekiner et al.
patent: 5104532 (1992-04-01), Thompson et al.
patent: 5286280 (1994-02-01), Chiou
patent: 5288304 (1994-02-01), Koros et al.
patent: 5310415 (1994-05-01), Simmons et al.
patent: 5591250 (1997-01-01), Stern et al.
patent: 5725769 (1998-03-01), Miller et al.
patent: 5922104 (1999-07-01), Park et al.
patent: 5928410 (1999-07-01), Jois et al.
patent: 5969087 (1999-10-01), Maeda
patent: 5972080 (1999-10-01), Nagata
patent: 6168649 (2001-01-01), Jensvold et al.
patent: 6383258 (2002-05-01), Simmons
patent: 6464755 (2002-10-01), Nakanishi et al.
patent: 6755900 (2004-06-01), Koros et al.
patent: 6932859 (2005-08-01), Koros et al.
patent: 0 459 623 (1994-06-01), None
Koros et al., “Membrane-Based Gas Separation”, J. Membrane Sci. 83 (1993) pp. 1-80.
E.M. Flanigen et al., “Silicalite, A New Hydrophobic Crystalline Silica Molecular Sieve”, Nature, vol. 271 (1978) pp. 512-516.
D.W. Breck, “The Molecular Sieve Effect”, Zeolite Molecular Sieves, Wiley (1974) pp. 635-637.
Prasad et al., “Evolution of Membranes in Commercial Air Separation”, J. Membrane Sci., 94 (1994) 225-248.
Koros William J.
Miller Stephen J.
Staudt-Bickel Claudia
Wallace David
Wind John
Chevron U.S.A. Inc.
Greene Jason M.
Sheridan Richard J.
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