ABSTRACT
Fractions or streams produced by crude distillation (Chapter 16), cracking (Chapter 17 and
Chapter 18), and other refinery processes (Chapter 14) (although usable in the refinery as
process feedstocks) often contain small amounts of impurities that must be removed.
Processes that remove these undesirable components are known as treating processes, and
these processes are used not only to finish products for the market but also to prepare
feedstocks for other processes (catalytic polymerization and reforming) (Chapter 23) in
which catalysts would be harmed by impurities (Bland and Davidson, 1967).
