问答题
用醋酸戊酯从发酵液中萃取青霉素,已知发酵液中青霉素浓度为0.2Kg/m3,萃取平衡常数为K=40,,处理能力(料液流速)为H=0.5m3/h,萃取溶剂流量为L=0.03m/h,若要产品收率达96%,试计算理论上所需萃取级数?
A.P1=0B.P1=P2C.P1=0.75P2D.P1=√3/2P2