Page 9 - Gas Purification 5E

conversion, thermal oxidation, permeation, and condensation are included in the chapters
devoted to these general subjects.
No attempt has been made to define the ownership or patent status of the processes
described. Many of the basic patents on well-known processes have expired; however,
patented improvements may be critical to commercial application. In fact, a number of
important proprietary systems are based primarily on the incorporation of special additives
or flow system modifications into previously existing processes.
Technical data are normally presented in the units of the original publication. practically,
this means that most U.S. data on commercial operations are given in English units, while
foreign and U.S. scientific data are presented in metric or, occasionally, SI units. To aid in
the conversion between systems, a table of units and conversion factors is included as
an appendix.
The assistance of many individuals who contributed material and suggested improvements
is gratefully acknowledged. Thanks ace also due to the companies and organizations who
graciously provided data and gave permission for reproducing charts and figures. The num-
ber of such organizations is too large to permit individual recognition in this preface; howev-
er, they are generally identified in the text as the sources of specific data. We particularly
acknowledge with appreciation the generous support of the Fluor Daniel Corporation in the
preparation of this edition, and to the following Fluor Daniel personnel: Joseph Saliga, for
providing much of the new data in Chapters 7 and 10 on Sq and NO, removal processes;
Michael Patter, for input on sulfur umversion processes; Paul Buclcingham, for work on the
physical solvent chapter; and David Weirenga, for assistance with the chapter on permeation
processes. Other significant contributors to this fifth edition are Ronald Schendel, consultant,
who provided data for Chapters 8 and 15 on sulfur conversion technology and permeation
processes; John McCullough, Proton Technology, who supplied information for the discus-
sion of amine plant corrosion in Chapter 3; Robert Bucklin, consultant, who provided
detailed information on sulfur scavenging processes for Chapter 16; and Dr. Carl Vancini,
who drafted the review of the Streeford process for Chapter 9. Finally, we wish to express
gratitude to our families: Evelyn, Jeffrey, and Martin Kohl; and Theresa and Michael Nielsen
for their support and patience during the preparation of this book
Arthur L. Kohl
Richard B. Nielsen