omprising about 10% ethanol in water, separated into a permeate vapor containing 40% ethanol and a residue solution containing 2 or 3% ethanol, using silicone rubber membranes in the modules;(b) a feed solution of raw gasoline in a refinery comprising a total of 30% toluene, benzene and other aromatics, separated into a residue gasoline stream containing below 25% total aromatics and a permeate va