Method to improve the selectivity of polybenzoxazole membranes

Details Method to improve the selectivity of polybenzoxazole membranes Method to improve the selectivity of polybenzoxazole membranes

2009-09-25

2010-10-12

Menon, Krishnan S (Department: 1797)

Liquid purification or separation

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C210S500340

Reexamination Certificate

active

07810652

ABSTRACT:
The present invention discloses a novel method to improve the selectivities of polybenzoxazole (PBO) membranes prepared from aromatic polyimide membranes for gas, vapor, and liquid separations. The PBO membranes that were prepared by thermal treating aromatic polyimide membranes containing between 0.05 and 20 wt-% of a poly(styrene sulfonic acid) polymer. These polymers showed up to 95% improvement in selectivity for CO2/CH4and H2/CH4separations compared to PBO membranes prepared from corresponding aromatic polyimide membranes without a poly(styrene sulfonic acid) polymer.

REFERENCES:
patent: 3133132 (1964-05-01), Loeb et al.
patent: 4230463 (1980-10-01), Henis et al.
patent: 4717393 (1988-01-01), Hayes
patent: 4855048 (1989-08-01), Tang et al.
patent: 4877528 (1989-10-01), Friesen et al.
patent: 5409524 (1995-04-01), Jensvold et al.
patent: 5679131 (1997-10-01), Obushenko
patent: 5837032 (1998-11-01), Moll et al.
patent: 6368382 (2002-04-01), Chiou
patent: 6626980 (2003-09-01), Hasse et al.
patent: 7048846 (2006-05-01), White et al.
patent: 7166146 (2007-01-01), Miller et al.
patent: 7485173 (2009-02-01), Liu et al.
patent: 2004/0097695 (2004-05-01), Yoon
patent: 2005/0268782 (2005-12-01), Kulkarni et al.
patent: 2006/0138042 (2006-06-01), Okamoto et al.
patent: 2007/0022877 (2007-02-01), Marand et al.
patent: 2008/0300336 (2008-12-01), Liu et al.
patent: 2009/0277327 (2009-11-01), Zhou et al.
patent: 2009/0297850 (2009-12-01), Jung et al.
patent: WO 91/16123 (1991-10-01), None
U.S. Appl. No. 12/412,629, filed Mar. 27, 2009, Liu et al.
U.S. Appl. No. 12/412,633, filed Mar. 27, 2009, Liu et al.
U.S. Appl. No. 12/412,639, filed Mar. 27, 2009, Liu et al.
U.S. Appl. No. 12/412,643, filed Mar. 27, 2009, Liu et al.
U.S. Appl. No. 12/412,647, filed Mar. 27, 2009, Liu et al.
U.S. Appl. No. 12/412,649, filed Mar. 27, 2009, Liu et al.
U.S. Appl. No. 12/412,653, filed Mar. 27, 2009, Liu et al.
Yaghi, Omar M. et al, Metal-organic frameworks: a new class of porous materials, Microporous & Mesoporous. Mater., 73: 3 (2004) pp. 3-14.
Barsema, J.N. et al., “Intermediate polymer to carbon gas separation membranes based on Matrimid PI”, J. Membr. Science, 238: 93 (2004) pp. 93-102.
Yaghi, Omar M. et al., Systematic Design of Pore Size and Functionality in Isoreticular MOFs & Their Application in Methane Storage, Science, 295: 469 (2002.
Dybtsev, Danil N. et al., Rigid and Flexible: A Highly Porous Metal0Organic Framework with Unusual Guest-Dependent Dynamic Behavior, Angew. Chem. Int. Ed., 43: 5033 (2004).
Tullos, Gordon L. et al., “Thermal Conversion of Hydroxy-Containing Imides to Benzoxazoles: Polymer and Model Compound Study”, Macromolecules, 32, 3598 (1999).
Ho Bum Park et al., “Polymers with Cavities Tuned for Fast Selective Transport of Small Molecules and Ions”, Science, 318, 254 (2007).

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