The Dow Chemical Company

Robert DeVellis

Patrick H Martin

Charles W Martin

Terrence L Caskey

H Hunter Paalman

Curtis M Tong

Alvin W Baker

Lawrence R Schroeder

Robin A Withers

The invention is a method for separating one or more polar liquids from one or more non-polar liquids which comprises the following steps. First, contacting a mixture comprising one or more polar liquids and one or more non-polar liquids with one side of a membrane comprising a polymer of a perfluorosulfonic acid, or metal salt thereof, which is adapted for selective permeation of the polar liquids over the non-polar liquids under conditions such that the polar liquids selectively permeate through the membrane. Second, passing a desiccant fluid by, pulling a vacuum on, or a combination thereof, the other side of the membrane, under conditions such that the polar liquids which have permeated through the membrane are carried away from the membrane. Third, removing the fluid desiccant containing the permeated polar liquids or the permeated polar liquids wherein a vacuum is used, from the vicinity of the membrane. Fourth, removing the non-polar liquids from the vicinity of the membrane. Another aspect of this invention is a novel hollow fiber membrane device useful for performing a preferred mode of the above-described method. This method allows the removal of one or more polar liquids which are dissolved in or entrained in one or more non-polar liquids in a continuous manner which no shoft-term changeout required.

Method and device for separating polar from non-polar liquids using

Solutions of amine-salified phosphoresins and the free amine in organic solvents are converted to stable dispersions of the salified resins in water by steam stripping under conditions such that at least part of the water is provided as condensed steam.

Method of converting resin solution to aqueous dispersion

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Antioch, CA, United States of America

Robert DeVellis