The system docosane–diphenylhexane (DPH)–furfural is representativeof complex systems encountered in the solvent refining of lubricating oils. Five hundred kg/h of a 40 wt% mixture of DPH in docosane are to be extracted in a countercurrent system with 500 kg/h of a solvent containing 98 wt% furfural and 2 wt% DPH to produce a raffinate of 5 wt% DPH. Calculate, with a right-triangle diagram, the stages required and the kg/h of DPH in the extract at 45oC and 80oC. BINODAL CURVES IN DOCOSANE-DIPHENYLHEXANE-FURFURAL SYSTEM [IND. ENG. CHEM., 35, 711 (1943)]Wt% at 45°CWt% at 80°CDocosaneDPHFurfuralDocosaneDPHFurfural96.00.04.090.30.09.784.011.05.050.529.520.067.026.07.034.235.830.052.537.510.023.836.240.032.647.420.016.233.850.021.348.730.010.729.360.013.246.840.06.923.170.07.742.350.04.615.480.04.435.660.03.07.090.02.627.470.02.20.097.81.518.580.01.09.090.00.70.099.3 The tie lines in the docosane-diphenylhexane-furfural systemare:Docosane PhaseComposition, wt%Furfural PhaseComposition, wt%DocosaneDPHFurfuralDocosaneDPHFurfuralTemperature, 45°C:85.210.04.81.19.889.169.024.56.52.224.273.643.942.613.36.840.952.3Temperature, 80°C:86.73.010.32.63.394.173.113.913.04.615.879.650.529.520.29.227.463.4

Given: Feed of 500 kg/h of 40 % DPH in D, 500 kg/h of solvent S, containing 98 wt % F, and 2 wt %…

Answered: BINODAL CURVES IN…

Introduction to Chemical Engineering Thermodynamics

8th Edition

ISBN:9781259696527

Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Chapter1: Introduction

Section: Chapter Questions

Problem 1.1P

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The system docosane–diphenylhexane (DPH)–furfural is representative
of complex systems encountered in the solvent refining of lubricating oils. Five hundred kg/h of a 40 wt% mixture of DPH in docosane are to be extracted in a countercurrent system with 500 kg/h of a solvent containing 98 wt% furfural and 2 wt% DPH to produce a raffinate of 5 wt% DPH. Calculate, with a right-triangle diagram, the stages required and the kg/h of DPH in the extract at 45^oC and 80^oC.

BINODAL CURVES IN DOCOSANE-DIPHENYLHEXANE-
FURFURAL SYSTEM [IND. ENG. CHEM., 35, 711 (1943)]
Wt% at 45°C
Wt% at 80°C
Docosane
DPH
Furfural
Docosane
DPH
Furfural
96.0
0.0
4.0
90.3
0.0
9.7
84.0
11.0
5.0
50.5
29.5
20.0
67.0
26.0
7.0
34.2
35.8
30.0
52.5
37.5
10.0
23.8
36.2
40.0
32.6
47.4
20.0
16.2
33.8
50.0
21.3
48.7
30.0
10.7
29.3
60.0
13.2
46.8
40.0
6.9
23.1
70.0
7.7
42.3
50.0
4.6
15.4
80.0
4.4
35.6
60.0
3.0
7.0
90.0
2.6
27.4
70.0
2.2
0.0
97.8
1.5
18.5
80.0
1.0
9.0
90.0
0.7
0.0
99.3

The tie lines in the docosane-diphenylhexane-furfural system
are:
Docosane Phase
Composition, wt%
Furfural Phase
Composition, wt%
Docosane
DPH
Furfural
Docosane
DPH
Furfural
Temperature, 45°C:
85.2
10.0
4.8
1.1
9.8
89.1
69.0
24.5
6.5
2.2
24.2
73.6
43.9
42.6
13.3
6.8
40.9
52.3
Temperature, 80°C:
86.7
3.0
10.3
2.6
3.3
94.1
73.1
13.9
13.0
4.6
15.8
79.6
50.5
29.5
20.2
9.2
27.4
63.4

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