Hi, for this question I have done questions i) and some of ii) but I am stuck for the rest.
i)
let U=unknowns
E=equations
stage 1:
no. of unknowns=5
no. of equations=4
U>E
therefore this is not solvable
stage 2:
no. of unknowns=5
no. of equations=4
U>E
therefore this is not solvable
stage 3:
no. of unknowns =3
no. of equations =3
U=E
therefore stage 3 is solvable.
ii)
P3/D3=3
D3=10lb (given)
therefore P3=30lb
ratio A:B in P2 is 4:1
therefore P2 has composition 0.8A, 0.2B
Here is where I am stuck, I cannot solve for the other unknowns.
The final answers that were given are: D1=30lb, D2=30, P2=30, P3=30, E=10 and stream E consists of 59% A and 41% B.