화학공학소재연구정보센터
Journal of Applied Polymer Science, Vol.104, No.5, 3077-3081, 2007
Concentration of benzylpenicillin sodium by polyimide nanofiltration membrane
In this work, a nanofiltration membrane prepared from soluble polyimide (HQDPA-DMMDA) was used to concentrate benzylpenicillin sodium solutions at 10 and 14 degrees C. Three benzylpenicillin sodium solutions with the concentration of 7.2, 13.0, and 19.7 g/L were used. The pressure varied from 0.5 to 2.0 MPa. The rejection reached 85%) for the solution of 19.7 g/L under 2.0 MPa. To the solution 2 of 7.2 g/L, the largest permeation flux was 9.5 kg/m(2) h. Temperature had a slight influence on flux, but the influence on rejection was complicated. A sharp increasing phenomenon of rejection appeared under 0.5 MPa when the concentration was 19.7 g/L. This was elucidated by Martinez-Landeira's works on benzylpenicillin's colloids. (c) 2007 Wiley Periodicals, Inc.