Page 29 - Analysis, Synthesis and Design of Chemical Processes, Third Edition

development of new devices, development of new chemicals, development of new processes to
produce these new chemicals, and development of marketable technology. The design hierarchy for
chemical product design is presented. The necessity of considering customer needs in chemical
product design and the need to develop interdisciplinary teams are discussed.
Chapter 5: Tracing Chemicals through the Process Flow Diagram
In order to gain a better understanding of a PFD, it is often necessary to follow the flow of key
chemical components through the diagram. This chapter presents two different methods to
accomplish this. The tracing of chemicals through the process reinforces our understanding of the
role that each piece of equipment plays. In most cases, the major chemical species can be followed
throughout the flow diagram using simple logic without referring to the flow summary table.

Chapter 6: Understanding Process Conditions
Once the connectivity or topology of the PFD has been understood, it is necessary to understand why
a piece of equipment is operated at a given pressure and temperature. The idea of conditions of
special concern is introduced. These conditions are either expensive to implement (due to special
materials of construction and/or the use of thick-walled vessels) or use expensive utilities. The
reasons for using these conditions are introduced and explained.