合成複合逆浸透膜による水溶性有価物の濃縮回収

概要

論文の詳細を見る
Recent developments of reverse osmosis membranes are reviewed from the point of synthetic composite membrane. Newly developed synthetic composite membrane, designated, PEC-1000 makes it possible to perform high water recovery operation in single-stage seawater desalination due to its high salt rejection and water flux, even under high temperature, high pressure and high feed salinity seawater as present in theMiddle East (which we designate the complete single-stage seawater desalination). PEC-1000 membrane shows high solute rejection for valuable water-soluble organic materials of low molecular weight at the evaluation condition of high feed water concentration. .PEC-1000 membrane also shows over 10 times higher solute rejection than that of the present commercialized membrane to various water-soluble inorganic compounds. For instance, it shows over 99.9% ion rejection for Cu2+, Co2+, Ni2+, or Fe (CN) 64-ion at 56kg/cm2, 25°C, 1% aqueous solutions. Field Tests are being conducted on PEC-1000 membrane element for the concentration of aqueous ε-caprolactam, acetic acid and ethylene glycol solution. Tests results show both solute rejection and water flux are quite stable over 5000 hours. These data indicate that PEC-1000 membrane exhibits its capable applications to a variety of field where the application of conventional reverse osmosis membrane is regarded as impossible.
日本膜学会の論文