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The fractions at the top of the fractionating column have lower boiling points than the fractions at the bottom.Aqueous Wastes from Petroleum and Petrochemical Plants (1st.).

59 60 The most important route of exposure for btex chemicals is inhalation due to the low boiling point of these chemicals.Schematic flow diagram of a typical oil refinery There are many process configurations other than that depicted above.To make (a substance eg sugar) pure by taking out dirt, waste substances etc.

Because it leads to equipment failure, it is a primary driver for the refinery maintenance schedule.Retrieved August 24, 2014.

"A Critical Review of Cancer Epidemiology in the Petroleum Industry, with a Meta-analysis of a Combined Database of More Than 350,000 Workers".Flow diagram of typical refinery edit The image below is a schematic flow diagram of a typical oil refinery 29 that depicts the various unit processes and the flow of intermediate product streams that occurs between the inlet crude oil feedstock and the final end.In fact, oil companies in the.S.

 Concerns include both direct injury through a heat illness or injury, as well as the potential for devastating burns should the worker come in contact with super-heated reagents/equipment.The crude oil feedstock has typically been processed by an oil production plant.