抄録
Concentration of aqueous acetone andn-butanol solutions by pervaporation was carried out using porous polypropylene hollow fiber. The dimensions of membrane were 0.083 μm as pore size diameter, 262μm as outer diameter, 20.6μm as membrane thicknessland 0.44 as porosity ε.Acetone andn-butanol are concentrated in the permeation. But the separation factor ofn-butanol and acetone was lower than their vapor liquid equiblia.
In the permeate, acetone is concentrated more thann-butanol when concentration of acetone in feed are equal to that ofn-butanol. Permeation fluxes of acetone, n-butanol and water increased exponentially with the increase of feed solution temperature. But concentration of acetone and n-butanol in the permeate kept almost constant. With the increase of flow rate of nitrogen gas, only permeation flux of water increases. Permeation fluxes of acetone, n-butanol and water increased with the decrease of downstream pressure.
