Patent ID: 6335202
Filing Date: 2002-01-01
Classification: G01N

Abstract:
A method for measuring permeation characteristics of a permeant through a dense nonporous membrane, comprising:(a) storing a liquid feed in a feed tank at a prescribed temperature; (b) permeating said liquid feed from said feed tank through a membrane from which moisture residues and volatile components have been eliminated and the temperature of which is kept constant by a heating oven; (c) passing the permeant from said membrane through a mass flow meter to generate a potential difference, which is simultaneously displayed and recorded with time in a recorder that is connected to a digital display, to measure the permeation rate thereof; (d) measuring the composition of the permeant on-line by passing the permeant from said mass flow meter through a gas chromatograph equipped with a thermal conductivity detector; and (e) condensing the permeant after passing said gas chromatograph with a condenser equipped with a refrigerator.