METHOD FOR RECOVERING PERFORMANCE OF WATER-PERMSELECTIVE PERVAPORATION MEMBRANE

摘要

PURPOSE: To provide a separation performance of a water-permselective pervaporation membrane deteriorated in separation performance. ;CONSTITUTION: The separation performance of the water-permselective pervaporation membrane is recovered by allowing the membrane deteriorated in separation performance to contact with an organic liquid having water content 3-40wt.% higher than an organic liquid to be treated. As a result, the recovery is executed as a module is mounted on a device. And the recovery is completed only by carrying out a simple operation that the water content in a liquid of object to be separated is increased and the shift from recovering treatment to normal operation is simply executed only by changing the composition of a feed liquid.;COPYRIGHT: (C)1996,JPO