ELEM PRIN OF CHEMICAL PROC(LL)+NEXTGEN
20th Edition
ISBN: 9781119761006
Author: FELDER
Publisher: WILEY
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Textbook Question
Chapter 6, Problem 6.99P
Acetone is lo be extracted with n-hexane from a 40.0 wt% acetone—0.0 wt% water mixture at 25°C. The acetone distribution coefficient (mass fraction acetone in the hexane-rich phase/mass fraction acetone in the water-rich phase) is 0.34. Water and hexane may be considered immiscible. Three different processing alternatives are to be considered: a two-stage process and two single-stage processes.
(a) In the first stage of the proposed two-stage process, equal masses of the feed mixture and pure hexane are blended vigorously and then allowed to settle. The organic phase is withdrawn and the aqueous phase is mixed with 75% of the amount of hexane added in the first stage. The mixture is allowed to settle and the two phases are separated. What percentage of the acetone in the original feed solution remains in the water at the end of the process?
(b) Suppose all of the hexane added in the two-stage process of Part (a) is instead added In the feed mixture and the process is carried out in a single equilibrium stage. What percentage of the acetone in the feed solution remains in the water al the end of the process?
(c) Finally, suppose a single-stage process is used but it is desired to reduce the acetone content of the rater to the final value of Pan (a). How much hexane must be added to the feed solution?
(d) Under what circumstances would each of the three processes be the most cost-effective? What additional information would you need to make the choice?
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Thermophysical Properties of Petroleum Fractions and Crude Ofls
67
3.4. A gas oil has the following TBP distillation data
Volume %
TBP (°C)
0
216
10
243
30
268
50
284
70
304
90
318
95
327
100
334
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0.850 g/cm³.
(a) Split this gas oil fraction into five pseudo-components. Calculate T., Pc
and w for each pseudo-component.
(b) Calculate T, Pc and w for the whole gas oil fraction.
(c) Calculate the enthalpy of this gas oil fraction at 400 °C using the Lee-
Kessler correlation with a reference state of ideal gas at 273.15 K.
3.3. Use the following crude assay data with crude API of 36 to estimate cut
vol%, critical properties and molecular weight for Light Naphtha (90-
190 °F) and Kerosene (380-520 °F). In addition, calculate the fractions
of paraffins, naphthenes and aromatics in the two cuts.
ASTM D86 (°F)
Volume % Cum vol%
SG
86
0.0
0.0
122
0.5
0.5
0.6700
167
1.2
1.7
0.6750
212
1.6
3.3
0.7220
257
2.7
6.0
0.7480
302
3.1
9.1
0.7650
347
3.9
13.0
0.7780
392
4.7
17.7
0.7890
437
5.7
23.4
0.8010
482
8.0
31.4
0.8140
527
10.7
42.1
0.8250
584
5.0
47.1
0.8450
636
10.0
57.1
0.8540
689
7.8
64.9
0.8630
742
7.0
71.9
0.8640
794
6.5
78.4
0.8890
20.8
99.2
0.9310
Chapter 6 Solutions
ELEM PRIN OF CHEMICAL PROC(LL)+NEXTGEN
Ch. 6 - Ten mL of pure liquid water in a cylinder with a...Ch. 6 - A quantity of methyl acetate is placed in an open,...Ch. 6 - Ethyl alcohol has a vapor pressure of 20.0 mm Hg...Ch. 6 - Prob. 6.4PCh. 6 - Prob. 6.5PCh. 6 - Prob. 6.6PCh. 6 - Prob. 6.7PCh. 6 - Prob. 6.8PCh. 6 - Prob. 6.9PCh. 6 - Prob. 6.10P
Ch. 6 - Prob. 6.11PCh. 6 - Prob. 6.12PCh. 6 - Prob. 6.13PCh. 6 - Air at 50% relative humidity is cooled...Ch. 6 - Prob. 6.15PCh. 6 - Prob. 6.16PCh. 6 - Air at 90°C and 1.00 atm (absolute) contains 10.0...Ch. 6 - When fermentation units are operated with high...Ch. 6 - When you step out of a shower, the temperature in...Ch. 6 - A fuel cell is an electrochemical device in which...Ch. 6 - Prob. 6.21PCh. 6 - Prob. 6.22PCh. 6 - Prob. 6.23PCh. 6 - Prob. 6.24PCh. 6 - Prob. 6.25PCh. 6 - Prob. 6.26PCh. 6 - Prob. 6.27PCh. 6 - Prob. 6.28PCh. 6 - An air conditioner is designed to bring 10.000...Ch. 6 - Prob. 6.30PCh. 6 - Prob. 6.31PCh. 6 - Prob. 6.32PCh. 6 - A gas stream containing 40.0 mole% hydrogen, 35.0%...Ch. 6 - Prob. 6.34PCh. 6 - In the manufacture of an active pharmaceutical...Ch. 6 - Prob. 6.36PCh. 6 - In the ?nal stage of the manufacturing process...Ch. 6 - Prob. 6.38PCh. 6 - A fuel gas containing methane and ethane is burned...Ch. 6 - A mixture of propane and butane is burned with...Ch. 6 - An important parameter in the design of gas...Ch. 6 - A liquid stream consisting of 12.5 mole% n-butane...Ch. 6 - Nitric acid is a chemical intermediate primarily...Ch. 6 - Prob. 6.44PCh. 6 - Sulfur trioxide (SO3) dissolves in and reacts with...Ch. 6 - State whether you would use Raoult’s law or Henrys...Ch. 6 - A gas containing nitrogen, benzene, and toluene is...Ch. 6 - Prob. 6.48PCh. 6 - Prob. 6.49PCh. 6 - A conelation for methane solubility in...Ch. 6 - Prob. 6.51PCh. 6 - The constituent partial pressures of a gas in...Ch. 6 - Prob. 6.53PCh. 6 - Prob. 6.54PCh. 6 - Prob. 6.55PCh. 6 - Prob. 6.56PCh. 6 - Prob. 6.57PCh. 6 - Prob. 6.58PCh. 6 - Nitrogen is bubbled through a liquid mixture that...Ch. 6 - Prob. 6.60PCh. 6 - Prob. 6.61PCh. 6 - Prob. 6.62PCh. 6 - The feed to a distillation column (sketched below)...Ch. 6 - Prob. 6.64PCh. 6 - Prob. 6.65PCh. 6 - Prob. 6.66PCh. 6 - Prob. 6.67PCh. 6 - Prob. 6.68PCh. 6 - Prob. 6.69PCh. 6 - Prob. 6.70PCh. 6 - A methanol-water feed stream is introduced to a...Ch. 6 - Prob. 6.72PCh. 6 - In this problem you will use a spreadsheet to...Ch. 6 - Prob. 6.74PCh. 6 - Prob. 6.75PCh. 6 - Prob. 6.76PCh. 6 - Acetaldehyde is synthesized by the catalytic...Ch. 6 - Dehydration of natural gas is necessary to prevent...Ch. 6 - A two-unit process is used to separate H2S from a...Ch. 6 - Prob. 6.80PCh. 6 - Prob. 6.81PCh. 6 - Prob. 6.82PCh. 6 - Prob. 6.83PCh. 6 - A solution containing 100 lbm KNO3/100 Ibm H2O at...Ch. 6 - A 10.0 wt% aqueous solution of sodium chloride is...Ch. 6 - Potassium dichromate (K2Cr2O7) is to be recovered...Ch. 6 - Prob. 6.87PCh. 6 - Prob. 6.88PCh. 6 - Sodium bicarbonate is synthesized by reacting...Ch. 6 - An ore containing 90 wt% MgSO4(H2O and the balance...Ch. 6 - An aqueous waste stream leaving a process contains...Ch. 6 - A solution of diphenyl (MW = 154.2) in benzene is...Ch. 6 - An aqueous solution of urea (MW = 60.06) freezes...Ch. 6 - Prob. 6.94PCh. 6 - Derive Equation 6.54 for the boiling-point...Ch. 6 - Prob. 6.96PCh. 6 - A stream of 5.00 wt% oleic acid in cottonseed oil...Ch. 6 - Benzene and hexane are being considered as...Ch. 6 - Acetone is lo be extracted with n-hexane from a...Ch. 6 - Prob. 6.100PCh. 6 - Prob. 6.101PCh. 6 - Five kilograms of a 30 wt% acetone70% water...Ch. 6 - An aqueous acetone solution is fed at a rate of...Ch. 6 - Prob. 6.104PCh. 6 - Prob. 6.105PCh. 6 - Air at 25°C and 1 atm with a relative humidity of...Ch. 6 - Prob. 6.107PCh. 6 - Prob. 6.108PCh. 6 - Various amounts of activated carbon were added to...
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