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【单选题】
在连续精馏塔中,精馏段操作线方程y=0.75x+0.2075,q线方程式为y=-0.5x+1.5x。请问(1)回 流比R:(2)馏出液组成x D ;(3)进料液的q值,并要求判断进料状态( )。A.
R=2,xD=0.64, q=0.542, 气液混合进料
B.
R=3,x D =0.83, q=0.333 , 气液混合进料
C.
R=2,x D =0.45, q=1.245, 冷液进料
D.
R=3,x D =0.56, q=1.382, 冷液进料
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