Composite Membranes
AssigneeFujifilm Manufacturing Europe B.V.
InventorYujiro Itami
Life of this patent
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Abstract
A composite membrane comprising a discriminating layer and a porous support layer for the discriminating layer, CHARACTERISED IN THAT the discriminating layer comprises at least 60 wt % of oxyethylene groups and the porous support layer has a CO2 gas flux of 5 to 150×10−5 m3(STP)/m2.s.kPa at a feed pressure of 2.07 kPa. The membranes are particularly useful for purifying waste gas streams e.g. by removing greenhouse gases.
Claims21
-15. (canceled)
A composite membrane comprising a discriminating layer and a porous support layer for the discriminating layer, CHARACTERISED IN THAT the discriminating layer comprises at least 60 wt % of oxyethylene groups and the porous support layer has a CO2 gas flux of 5 to 150×10−5 m3(STP)/m2.s.kPa at a feed pressure of 2.07 kPa.
A process for preparing a composite membrane comprising applying a curable composition to a porous support layer having a CO2 gas flux of 5 to 150×10−5 m3(STP)/m2.s.kPa, when measured at a feed pressure of 2.07 kPa, and curing the composition, thereby forming a discriminating layer on the porous support layer, wherein the curable composition comprises non-volatile and optionally volatile components and at least 60 wt % of the non-volatile components are oxyethylene groups.
Dependencies are inferred from the claim text.