Gas separation – Means within gas stream for conducting concentrate to collector
Patent
1989-09-12
1990-09-04
Spitzer, Robert
Gas separation
Means within gas stream for conducting concentrate to collector
55 68, 55158, B01D 5322, B01D 7164
Patent
active
049541447
ABSTRACT:
The present invention is a class of polyimide membranes wherein the diamine portion of the polymer structure is formed from 2,5-di-t-butyl-1,4-phenylenediamine. Membranes formed from polyimides containing this diamine structure exhibit unexpectedly high gas permeability properties and are especially useful for separating oxygen from nitrogen or air.
REFERENCES:
patent: Re30351 (1980-07-01), Hoehn et al.
patent: 3822202 (1974-07-01), Hoehn
patent: 4156597 (1979-05-01), Browall
patent: 4378400 (1983-03-01), Makino et al.
patent: 4512893 (1985-04-01), Makino et al.
patent: 4528004 (1985-07-01), Makino et al.
patent: 4705540 (1987-11-01), Hayes
patent: 4717393 (1988-01-01), Hayes
patent: 4717394 (1988-01-01), Hayes
patent: 4746474 (1988-05-01), Kohn
patent: 4830640 (1989-05-01), Nakamura et al.
patent: 4838900 (1989-06-01), Hayes
T. H. Kim et al., "Reverse Permselectivity" of N.sub.2 over CH.sub.4 in Aromatic Polyimides, J. Appl. Poly. Sci., vol. 34, 1767-1771 (1987).
M. Salane, "Prediction of Gas Barrier Properties of High Polymers", Poly. Eng. Sci., vol. 26, No. 22, p. 1543 (1986).
Burgoyne, Jr. William F.
Fowlkes Robert L.
Langsam Michael
Air Products and Chemicals Inc.
Marsh William F.
Rodgers Mark L.
Simmons James C.
Spitzer Robert
LandOfFree
Polyimide membranes and their use for gas separation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Polyimide membranes and their use for gas separation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polyimide membranes and their use for gas separation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-439157