Pervaporation composite membranes

Details Pervaporation composite membranes Pervaporation composite membranes

2005-04-25

2009-10-20

Fortuna, Ana M (Department: 1797)

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

C210S500430, C210S490000, C210S644000, C210S500270, C264S041000, C428S310500, C428S304400, C428S306600, C096S004000, C096S012000, C096S014000, C095S052000, C435S177000, C435S180000

Reexamination Certificate

active

07604746

ABSTRACT:
The present application discloses a composite membrane comprising (a) a support member that has a plurality of pores extending through the support member and (b) a cross-linked copolymer comprising (i) a cationic monomer and an anionic monomer and/or (ii) a zwitterionic monomer, which cross-linked copolymer fills the pores of the support member, the cross-linked copolymer having a permeability for a fluid that is dependent on the polarity of the fluid, wherein the permeability increases with increasing polarity.The present application also discloses a process for the preparation of the composite membrane, a pervaporation apparatus comprising the composite membrane, and methods for the use of the composite material in separation and dehydration processes.

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