TREATMENT OF COMPOSITE POLYAMIDE MEMBRANES TO IMPROVE PERFORMANCE

摘要

Composite polyamide reverse osmosis membranes are treated with an aqueous chlorinating agent at a concentration of 200 to 10,000 ppm for a time sufficient to improve flux, lower salt passage and increase the stability to base. In a preferred embodiment the membrane is treated with heated water at temperature of 40 ~C to 100 ~C before being exposed to the chlorine treatment.