| abstract |
An ultrafiltration membrane comprised of a linear polyurethane having a hydraulic permeability for water of about 50 to 500 1/m 2 · h and a separation factor α of about 2×10 -3 to 1×10 -4 , the permeability being based on determination with a membrane of a thickness of about 0.02 mm, a pressure differential of 1 bar and a temperature of 20° C. and the separation factor α being established with a 2% oil-water emulsion at 25° C. The membrane is particularly suited for operation of oil-water mixtures or emulsions. |