Process for membrane separation of linear hydrocarbons within a hydrocarbon mixture
AssigneeIfp Energies Nouvelles
InventorsSerge Gonzalez, Jacques Vallet, Arnaud Baudot, Helene Rodeschini
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Abstract
The invention relates to a process for membrane separation that makes it possible to separate linear hydrocarbons from branched hydrocarbons. The membrane that is used comprises a dense selective layer that consists of a polymer whose chemical structure contains at least one bis-phenyl-9,9-fluorene group.
Claims19
A process for membrane separation of hydrocarbons, comprising subjecting to a membrane and selectively extracting a linear hydrocarbon that is contained in a mixture that comprises at least said linear hydrocarbon and a corresponding branched hydrocarbon, whereby the membrane has a selective layer comprising a dense polymer film whose chemical structure contains a bis-phenyl-9,9-fluorene group, in which the selective layer of the polymer membrane that contains the bis-phenyl-9,9-fluorene group is selected from the group that consists of polymers of the following families:
- polyimides, polyamides, polycarbonates, polysulfones, poly(amide imides), poly(ether sulfones), polyesters, or copolymers or polymer mixtures of these families.
A process for membrane separation of hydrocarbons, comprising subjecting to a membrane a mixture of n-butane and isobutane or n-butene and isobutene, whereby the membrane has a selective layer comprising a dense polyimide film containing a bis-phenyl -9, 9-fluorine group, and selectively extracting n-butane or n-butene.
Dependencies are inferred from the claim text.