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Q#1 GATE CH 2020 NAT +2 marks -0 marks

Two ideal cross- current stages operate to extract P from a feed containing P and Q, as shown below.

               

The mass flow rates of P and Q to stage 1 are 1,000 kg h−1 and 10,000 kg h−1, respectively. Pure solvent (S) is injected at mas flow rates of 5,000 kg h−1 and 15,000 kg h−1 to stages 1 and 2, respectively. The components Q and S are immiscible. The equilibrium relation is given by Y* = 1.5 X, where X is the mass of P per unit mass of Q in the raffinate, and Y* is the mass of P per unit mass of S in the extract, which is in equilibrium with the raffinate. The mass flow rate of P (in kg h−1) in the raffinate from state 2 is____(round off to nearest integer).

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