Thin film composite membranes for separation of alkenes from alkanes
AssigneeCompact Membrane Systems, Inc.
InventorsSudipto Majumdar, Andrew Edward Feiring, Ning Shangguan, Yosuke Koizumi
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Abstract
Composite membranes comprised of at least two layers, one of the layers being a silver ionomer and a second layer which is a fluorinated polymer with certain permeability properties, are especially useful for the separation of alkanes from alkenes, Particularly useful is a three-layer composite membrane in which a porous layer is laminated to the second layer.
Claims50
A thin film composite membrane for the separation of alkanes from alkenes, comprising:
- (a) a separation layer comprising a silver ionomer of a polymeric sulfonic acid;
- and
- (b) a high diffusion rate layer, which is nonporous, of one or more fluorinated polymers having a permeance to nitrogen of at least about 250 GPU, and wherein said separation layer and said high diffusion rate layer are laminated to each other.
A membrane process for the separation of alkanes from alkenes, wherein the improvement comprises, using a thin film composite membrane, comprising:
- (a) a separation layer comprising a silver ionomer of a polymeric sulfonic acid;
- and
- (b) a high diffusion rate layer, which is nonporous, of one or more fluorinated polymers having a permeance to nitrogen of at least about 250 GPU, and wherein said separation layer and said high diffusion rate layer are laminated to each other.
Dependencies are inferred from the claim text.