Abstract
Possibility of the concentration process of organic aqueous solutions to remove water vapor from vaporized mixtures by permeating it selectively through the aromatic polyimide membranes was studied. Hollow fiber type polyimide membranes show stable performance in most organic vapors at high temperature. For example, they provides as high as 180 of the permeation rates ratio for H2O and C2H5 OH at 120 °C. Therefore, it becomes possible to design the efficient vapor permeation processes operated under higher temperature and pressure.
