Asymmetric forward osmosis membranes

Details Asymmetric forward osmosis membranes Asymmetric forward osmosis membranes

2005-04-07

2008-11-04

Fortuna, Ana M (Department: 1797)

Liquid purification or separation

Filter

Material

C210S500270, C210S490000, C264S041000

Reexamination Certificate

active

07445712

ABSTRACT:
There is disclosed a membrane formulation having high flux for forward osmosis applications. There is disclosed a forward osmosis filtration membrane having a salt rejection 99+% or greater, and comprising an asymmetric hydrophobic porous backing and cellulosic fibers. The membranes of the present invention find use in a variety of applications including osmotic-driven water purification and filtration, desalination of sea water, purification of contaminated aqueous waste streams, and the like. Specifically, there is disclosed a forward osmosis filtration membrane having a skin layer for salt rejection and a porous scaffold layer having a woven or non-woven mesh embedded within it.

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