Question

In: Other

Distillates of benzene containing benzene 42 wt% and Toluene mixture 3000 kg/hr shall be distilled, so...

Distillates of benzene containing benzene 42 wt% and Toluene mixture 3000 kg/hr shall be distilled, so that the benzene of the distillate is 95 wt % and the Tolumen of 98 %. Find the D(mole/hr) and W (mole/hr). The molecular weight of benzene and Toluene is 78 and 92 respectively.

Solutions

Expert Solution

Feed rate F = 3000 kg/h

Benzene enters the column = 3000 x 0.42 = 1260 kg/h

Overall mass balance

3000 = D + W

Multiply by 0.02

60 = 0.02D + 0.02W

Benzene balance

1260 = D*0.95 + W*0.02

Solve the above equations simultaneously

1200 = 0.93 D

D = 1290 kg/h

W = 3000 - 1290 = 1710 kg/h

Benzene in distillate = 1290 x 0.95 = 1225.5 kg/h

Moles of Benzene in distillate = ( 1225.5 kg/h) / (78 kg/kmol)

= 15.712 kmol/h x 1000mol/kmol

= 15712 mol/h

Toluene in distillate = 1290 x 0.05 = 64.5 kg/h

Moles of Toluene in distillate = ( 64.5 kg/h) / (92 kg/kmol)

= 0.701 kmol/h x 1000mol/kmol

= 701 mol/h

Total Moles of distillate D = 15712 + 701 = 16413 mol/h

Similarly

Benzene in bottom = 1710 x 0.02 = 34.2 kg/h

Moles of Benzene in bottom = ( 34.2 kg/h) / (78 kg/kmol)

= 0.438 kmol/h x 1000mol/kmol

= 438 mol/h

Toluene in bottom = 1710 x 0.98 = 1675.8 kg/h

Moles of Toluene in bottom = ( 1675.8 kg/h) / (92 kg/kmol)

= 18.215 kmol/h x 1000mol/kmol

= 18215 mol/h

Total Moles of bottom W = 438 + 18215 = 18653 mol/h

Amanda K answered 2 years ago
Next > < Previous

Related Solutions

A liquid mixture of benzene-toluene is to be distilled in a fractionating tower at 101.3 kPa...
A liquid mixture of benzene-toluene is to be distilled in a fractionating tower at 101.3 kPa pressure. The feed of 100 kg mol/h is liquid, containing 45 mol benzene and 55 mol% toluene, and enters at 327.6 K. A distillate containing 95 mol benzene and 5 mol toluene and a bottoms containing 10 mol benzene and 90 mol toluene are to be obtained. The reflux ratio R is 4: 1. Determine the kg moles per hour distillate, kg moles per...
A liq mixture of benzene-toluene is to be distilled in a fractionating tower at 101.3 kPa...
A liq mixture of benzene-toluene is to be distilled in a fractionating tower at 101.3 kPa pressure. The feed of 100 kg mol/h is liquid and it contains 45 mole % benzene and 55 mole % toluene and enters at 327.6 K (130 ◦F). A distillate containing 95 mole % benzene and 5 mole % toluene and a bottoms containing 10 mole % benzene and 90 mole % toluene are to be obtained. The average heat capacity of the feed...
1000 kg/h of a mixture containing equal parts by mass of benzene and toluene isdistilled to...
1000 kg/h of a mixture containing equal parts by mass of benzene and toluene isdistilled to get overhead product containing 95% benzene (weight basis). The flow rate of bottom stream being 512 kg/h. Calculate : A) flow rate of overhead product B) The flow of benzene and Toluene in the bottom product. C) The molar fraction of benzene in the bottom stream.
Problem 1 Rectification. McCabe-Thiele Method. A mixture of benzene-toluene is to be distilled in a fractionating...
Problem 1 Rectification. McCabe-Thiele Method. A mixture of benzene-toluene is to be distilled in a fractionating tower at 101.3 kPa. The column is fed 120 kg mol /h of a saturated liquid at the boiling point with 60 mol % benzene and 40 mol % toluene. The content of the distillate is 92 mol % benzene, and of the bottoms 5 mol % benzene. The reflux ratio is 3:1. (a) Calculate the kg mol/h distillate: D=_______ (b) Calculate the kg...
mixture of 10 kmol of 70 mol% benzene in toluene is distilled at atmospheric pressure using...
mixture of 10 kmol of 70 mol% benzene in toluene is distilled at atmospheric pressure using differential distillation with a constant boil up the rate of 10 mol/min. When 50% (by mole) has been vaporized, report the residue composition, the average vapor composition, the temperature of the still, and how long the process takes using : 1. K-constant=1.48 2.alpha constant=2.41
A gas containing nitrogen, benzene, and toluene is in equilibrium with a liquid mixture of 30.0...
A gas containing nitrogen, benzene, and toluene is in equilibrium with a liquid mixture of 30.0 mole% benzene–70.0 mole% toluene at 50.0°C and 15.0 atm. Estimate the gas-phase composition (mole fractions using Raoult's law).
100 kg/hr of aqueous mixture containing 74 %wt of sucrose is cooled from 60 ˚C to...
100 kg/hr of aqueous mixture containing 74 %wt of sucrose is cooled from 60 ˚C to 20 ˚C. Due to the decrease in temperature, some of the sugar precipitates out from the mixture as crystals and are subsequently removed via a separator unit.  In the separation of the crystals, for every 1 kg of crystals removed, 0.05 kg of the aqueous mixture will be removed together with the crystals.  Calculate the mass flow rate of the remaining saturated aqueous solution (in kg/hr)....
An ideal benzene toluene mixture contains 6 moles of benzene and 4 moles of toluene at...
An ideal benzene toluene mixture contains 6 moles of benzene and 4 moles of toluene at 25 ° C. The saturated vapor pressure of pure benzene at 25 ° C is 96 Torr, the saturated vapor pressure of pure toluene is 29 Torr. Initially, the mixture at 760 Torr pressure is only liquid. The total pressure is then slowly reduced to a pressure of 60 Torr. Calculate the composition of liquid phase and vapor phase, and calculate liquid and vapor...
An ideal benzene toluene mixture contains 6 moles of benzene and 4 moles of toluene at...
An ideal benzene toluene mixture contains 6 moles of benzene and 4 moles of toluene at 25 ° C. The saturation steam pressure of pure benzene at 25 ° C is 96 Torr, the saturation steam pressure of pure toluene is 29 Torr. Initially, the mixture at 760 Torr pressure is only liquid. The total pressure is then slowly reduced to a pressure of 60 Torr. Calculate the composition of liquid phase and vapor phase, and liquid and vapor mole...
A binary mixture of benzene and toluene will be separated by continuous distillation. The mixture consists...
A binary mixture of benzene and toluene will be separated by continuous distillation. The mixture consists of 20% mol of benzene and 80% mol of toluene at the bubble point of 91ºC. The binary mixture is available at 100 mol h-1 and the separation should deliver a distillate product that has a concentration of 90% mol of benzene and that contains half of the benzene in the feed stream. a) Plot the equilibrium line for benzene. b) Determine the minimum...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT