REMOVAL OF GAS OR LOW BOILING POINT VOLATILE ORGANIC MATTER

摘要

PURPOSE:To increase the permeation rate of vapor so as to remove org. matter by a method wherein an aq. solution having dissolved therein a gas or a low b.p. volatile org. matter is brought into contact with a water-impermeable membrane on one side thereof with the temp. of the aq. solution maintained within a specific range and the vapor pressure of the component of the aq. solution is brought closer to zero on the other side thereof. CONSTITUTION:An aq. solution having dissolved therein a gas or a low b.p. volatile org. matter is brought into contact with water-impermeable membrane on one side thereof with the temp. of the aq. solution maintained between room temp. and water b.p., inclusive. The vapor pressure of the component of the aq. solution on the other side of the membrane is brought closer to zero, whereby the permeating dissolved component is removed. By way of example, the water-impermeable membrane may be a homogeneous membrane consisting of nonporous activated thin film.