Revers osmosis

I. West moral and. Spirally Wrapped Revere Osmosis Membrane Cell, U.S. Patent 3,367,504,... 

Diffusive transport rates through a polymeric phase are vety important to membrane reparation processes such as reveres osmosis, ultrafiltration, and gus permeation. See Chapters 18-21 fordiscossion of msmbrane processes. Here, diffusion coefficients of solutes within a polymeric material are discussed. 

The removal of water from aqueous salt notations by reveres osmosis, as in seawater desaiiontion with cellulose acetate menibmues or aylon hollow fibers, is believed to occur primarily by a diffusive transport mechanism for both water and solutes. On the other hand, in the use of membranes for die removal of water from aqueous solutions containing higher molecular weight solutes, such as die ultrafiltration of protein solutions, die solvent is believed transported by a viscous How mechanism within the pores of the membrane and nolute molecules are corrected with the solvent in die larger pores.66-66... 

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