Industrial Plastics: Theory and Applications
6th Edition
ISBN: 9781285061238
Author: Lokensgard, Erik
Publisher: Delmar Cengage Learning
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Chapter 7, Problem 7.25Q
Interpretation Introduction
Interpretation:
The reason for crazing, chalking, color changes & loss of properties in polymers should be defined.
Concept introduction:
Polymers are defined as large or macro molecules which consist of many repeating subunits.
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Do question 9 please! Question 7 Is just there for reference!!
7) You are tasked with separating two proteins by ion exchange chromatography on a 30 cm long
column with an inner diameter of 2 cm. The resin has a diameter of 100 μm and a void fraction
of 0.3, and your mobile phase flows through the column at a rate of Q = 5 cm³/min. The Van
Deemter coefficients A, B, and C have been determined to be 0.0228 cm, 0.0036 cm²/min, and
0.00053 min, respectively, for both proteins. Protein A elutes from the column with an average
retention time of 27 min and standard deviation of 0.8 min. Protein B elutes from the column.
with an average retention time of 33.8 min and standard deviation of 1.0.
a) How many theoretical plates does the column contain?
b) What flow rate (Q) will give you the maximum resolution?
c) What is the minimum height of a theoretical plate for the system?
4) A fixed bed adsorption unit contains rigid (incompressible) silica particles with a diameter of
120 um and porosity of 0.3. The resin bed is 200 cm long and has a diameter of 15 cm. A protein
solution is pumped into the column at a rate of 50 L/min, and the mobile phase has a viscosity of
1.2 CP.
a) What is the pressure drop for this system (in bar)?
b) What would be the pressure drop if the particle diameter were decreased to 30 μm?
Chapter 7 Solutions
Industrial Plastics: Theory and Applications
Ch. 7 - Prob. 7.1QCh. 7 - Prob. 7.2QCh. 7 - Prob. 7.3QCh. 7 - Prob. 7.4QCh. 7 - Prob. 7.5QCh. 7 - Prob. 7.6QCh. 7 - Prob. 7.7QCh. 7 - Prob. 7.8QCh. 7 - Prob. 7.9QCh. 7 - Prob. 7.10Q
Ch. 7 - Prob. 7.11QCh. 7 - Prob. 7.12QCh. 7 - Prob. 7.13QCh. 7 - Prob. 7.14QCh. 7 - Prob. 7.15QCh. 7 - Prob. 7.16QCh. 7 - Prob. 7.17QCh. 7 - Prob. 7.18QCh. 7 - Prob. 7.19QCh. 7 - Prob. 7.20QCh. 7 - Prob. 7.21QCh. 7 - Prob. 7.22QCh. 7 - Prob. 7.23QCh. 7 - Prob. 7.24QCh. 7 - Prob. 7.25QCh. 7 - Prob. 7.26QCh. 7 - Prob. 7.27QCh. 7 - Prob. 7.28QCh. 7 - Prob. 7.29QCh. 7 - Prob. 7.30QCh. 7 - Prob. 7.31Q
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