Question

Process Stream Specifications a. The final product distillate contains 0.864 mo1% benzene (B), 324 ppm (by mole) diisopropyl benzene (DB), and the rest isopropyl benzene (IB). Since your company wants to put wt% values on the product it sells, determine the composition (in wt%) of the product stream. b. (6) The final liquid bottom stream (which will be used for fuel elsewhere in the plant) contains 1.80 mol IB/h and 3.68 mol DB/h. Assuming volume additivity, determine the volumetric flow rate (in L/day) of this liquid stream. What other assumption have you made for this calculation?

Answer 1

100 *@ Basts: 100 moles of the mixture . Moles of Benzene (B) = 0.864. X100 = 0.264 vuoles, Moles of disopropyl Benzene (DB) X100 = 0.0 324 moles 324 106 Mols of isopropyl benzene (IB) = (100 - 0.864 -0.03 24 ) = 99.1036 moles Now, Molecular weight of the componeuls ase', Benjene = 78.11g/mol disspapyl benjene - 162.21 g/mol sopropyl benyne - 120.19 g/mol. = 67.487 g . Mass of B = 0.864 moles x 78 11 9/mol Mass of DB - 0.03 2 4 wooles x 162.27.62 = 5.2579 Mess of Ibi 99. 1036 rastes x 120.19g - Total, weight of the mixture - (67.484 + 5-257 + 1191.26 grany = 11984.00ug = 11911.269 wat

Percent .. Weight decretion of B = 67.4879 x 100 11984.0049 - 0.563 Y. Weight percent of DB = 5.2574 xido 11984.00ug 0.04387 % Weight percent of IB = 11911:269_ x 100 11984.0049 = 99.39 % stus (b Bottom stream contains 1.80 mol IB and 3.68 mol DB hi hr moles hr :: Total flow rate = (1.80 +3.68 = 5.48 moles hr.

Mass flow rate of IB = 1.80 mol x 120.19 g nr mol = 216.342 g nr. Mass flow rate of DB = 3.68 mol x 162-27 g mol - 597.1536 g 67 nr. 862.0 m3 and Density m3 Density of Isopropyl Benzene = 69 kg. Diisopropyl Benzene = 855.9 kg, .. volumetric How-rate of I B = 216.342 X10-9 kg/hr 862.0 855.00 kg/m3 2.5096X10-9 m3/07 Volumetric flow rate of DB = 597.1536 X10-9 kg/hr 855.9 kg/m3 = 6.9769 810-4 m3/hr i. Total volumetric flow rate of the mixture = 2.5096X10-4 +689769x10-4 m3 3/hr

= 9.4865 X10-4 no xha Day m3/hr = 9.4865 810-4 x 1000 L = 9.4865x1074 x 1000 x 24 (the 22.7676 L Day .: Volumetric flow rate of liquid stream 22.7676 L Day こ