Method of selectively separating unsaturated hydrocarbon

Details Method of selectively separating unsaturated hydrocarbon Method of selectively separating unsaturated hydrocarbon

1996-02-22

1998-05-12

Spitzer, Robert

Gas separation: processes

Selective diffusion of gases

Selective diffusion of gases through substantially solid...

96 14, 585818, B01D 5322

Patent

active

057499438

ABSTRACT:
A homogeneous membrane or an asymmetric membrane which is made of polyimide resin containing fluorine as a main component and has high separation and permeation properties, is used in a method of separating unsaturated hydrocarbon from a mixture of unsaturated and saturated hydrocarbon. The method includes the steps of contacting the mixture onto the membrane made of the polyimide resin having a repeating unit shown in the following formula as a main component, selectively permeating unsaturated hydrocarbon through the membrane, and separating unsaturated hydrocarbon from the mixture. The membrane satisfies the condition of a solubility coefficient ratio between unsaturated and saturated hydrocarbon.gtoreq.1.2 at 25.degree. C. and more than 50 Torr when the absorption of hydrocarbon to the polyimide resin is in equilibrium. ##STR1##

REFERENCES:
patent: Re30351 (1980-07-01), Hoehn et al.
patent: 2930754 (1960-03-01), Stuckey
patent: 2958656 (1960-11-01), Stuckey
patent: 3789079 (1974-01-01), Perry et al.
patent: 3822202 (1974-07-01), Hoehn
patent: 4532029 (1985-07-01), Black et al.
patent: 4532041 (1985-07-01), Shuey et al.
patent: 4614524 (1986-09-01), Kraus
patent: 4705540 (1987-11-01), Hayes
patent: 4717393 (1988-01-01), Hayes
patent: 4717394 (1988-01-01), Hayes
patent: 4755299 (1988-07-01), Bruschke
patent: 4929405 (1990-05-01), Kohn
patent: 4932982 (1990-06-01), Hayes
patent: 4932983 (1990-06-01), Hayes
patent: 5015268 (1991-05-01), Ho
patent: 5042992 (1991-08-01), Blinka et al.
patent: 5112941 (1992-05-01), Kasai et al.
patent: 5165963 (1992-11-01), Matsumoto et al.
patent: 5178940 (1993-01-01), Matsumoto et al.
patent: 5254795 (1993-10-01), Boucher et al.
patent: 5310415 (1994-05-01), Simmons et al.
patent: 5322549 (1994-06-01), Hayes
patent: 5430224 (1995-07-01), Schucker

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