Abstract
Separation factors and permeation rates by pervaporation were measured for various organic solvents-water systems using the silicone rubber membrane. It was found that this membrane permeated organic solvents prefferentially compared to water, and this characteristic was different many other memdranes reported so far. This nature is very useful for the separation and the concentration of dilutes organic and permeation rates can be estimated by using permeation rates of pure components, except for the case of swelling. For this latter case the superficial rates was adopted, which can be obtained by the experiment of mixture permeation.
