ABSTRACT
Fractions or streams produced by crude distillation (Chapter 13), cracking (Chapters 14, 15, and 16), and other refinery processes (Chapter 18) 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 to prepare feedstocks for other processes (catalytic polymerization and reforming) (Chapter 18) in which catalysts would be harmed by impurities (Bland and Davidson, 1967).
