DeGarmo's Materials and Processes in Manufacturing
12th Edition
ISBN: 9781118987674
Author: J. T. Black, Ronald A. Kohser
Publisher: WILEY
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Chapter 34, Problem 23RQ
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The PLC.
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One thousand kg/h of a (50-50 wt%) acetone-in-water solution is to be extracted at 25C in a continuous,
countercurrent system with pure 1,1,2-trichloroethane to obtain a raffinate containing 10 wt% acetone. Using the
following equilibrium data, determine with an equilateral-triangle diagram:
a- the minimum flow rate of solvent;
b- the number of stages required for a solvent rate equal to 1.5 times minimum, and composition of each
streamleaving each stage.
c- Repeat the calculation of (a) and (b) if the solvent used has purity 93wt% (4wr% acetone, 3wt% water
impurities)
acetone water
1,1,2-trichloroethane
Raffinate. Weight
Extract. Weight
0.6
0.13
0.27
Fraction Acetone
Fraction Acetone
0.5
0.04
0.46
0.44
0.56
0.4
0.03
0.57
0.29
0.40
0.3
0.02
0.68
0.12
0.18
0.2
0.015
0.785
0.0
0.0
0.1
0.01
0.89
0.55
0.35
0.1
0.5
0.43
0.07
0.4
0.57
0.03
0.3
0.68
0.02
0.2
0.79
0.01
0.1
0.895
0.005
2500 kg/hr of (20-80) nicotine water solution is to be extracted with benzene containing 0.5% nicotine in
the 1st and 2ed stages while the 3rd stage is free of nicotine. Cross- current operation is used with different amounts
of solvent for each stages 2000kg/hr in the 1st stage, 2300 kg/hr in the 2nd stage, 2600 kg/hr in the 3rd,
determine: -
a- The final raffinate concentration and % extraction.
b-
b- The minimum amount of solvent required for counter-current operation if the minimum concentration
will be reduced to 5% in the outlet raffinate.
Equilibrium data
Wt % Nicotine in water
Wt % Nicotine in benzene
0
4
16
25
0
4
21
30
Quiz/An eccentrically loaded bracket is welded to the support as shown in Figure below. The load is static. The weld size
for weld w1 is h1=6mm, for w2 h2 5mm, and for w3 is h3 -5.5 mm. Determine the safety factor (S.f) for the welds.
F=22 kN. Use an AWS Electrode type (E90xx).
140
101.15
REDMI NOTE 8 PRO
AI QUAD CAMERA
F
Chapter 34 Solutions
DeGarmo's Materials and Processes in Manufacturing
Ch. 34 - Prob. 1RQCh. 34 - Give an everyday example of a household device or...Ch. 34 - Prob. 3RQCh. 34 - Prob. 4RQCh. 34 - Prob. 5RQCh. 34 - Prob. 6RQCh. 34 - How is a machining center different from a milling...Ch. 34 - Prob. 8RQCh. 34 - What makes an NC machine a machining center?Ch. 34 - At what level of automation is your typical...
Ch. 34 - Figure 24.6 shows tool paths to rough and finish...Ch. 34 - In Figure 34.6. what is a G70 finish cycle (see...Ch. 34 - Prob. 13RQCh. 34 - Prob. 14RQCh. 34 - Prob. 15RQCh. 34 - Prob. 16RQCh. 34 - What is the difference between an FMS and an FMC?Ch. 34 - What does the A(5) level of automation require...Ch. 34 - Prob. 19RQCh. 34 - Prob. 20RQCh. 34 - Prob. 21RQCh. 34 - Prob. 22RQCh. 34 - Prob. 23RQCh. 34 - FMSs use CNC machines for processing and AGVs,...Ch. 34 - Why are transfer lines replacing relay logic with...Ch. 34 - Prob. 26RQCh. 34 - Prob. 27RQCh. 34 - Prob. 28RQCh. 34 - Prob. 29RQCh. 34 - Prob. 30RQCh. 34 - Prob. 31RQCh. 34 - Compare a human worker in a manned cell to the...Ch. 34 - Prob. 33RQCh. 34 - What is a teach pendant?Ch. 34 - Prob. 35RQCh. 34 - Prob. 1PCh. 34 - Prob. 2PCh. 34 - Prob. 3P
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