Atmospheric and Vacuum Distillation


To enhance the participants' knowledge, skills, and abilities necessary for better understanding of distillation and corrosion control.


By the end of this course, participant will be able to:

  • Understand the initial fractionation of crude oil.

  • Analyse operating conditions of an atmospheric distillation unit (ADU).

  • Be Familiar with desalting and corrosion controls.

  • Analyse operating conditions of a vacuum distillation unit.

  • Be familiar with operation of the multi-draw off columns


  • Initial Fractionation of Crude Oil.
  • TBP Analysis of Crude Oils.
  • Determination of Petroleum Fractions in View of their end-use.
  • Crude Oils: Overall Properties and Yields.
  • Main Crude Oil Fractionation Schemes.
  • Analysis of Operating Conditions of an Atmospheric Distillation Unit (ADU).
  • Typical Unit: Process Scheme, Operating Conditions.
  • Material Balance: Crude Oil Yields, Product Characteristics, Separation Quality.
  • Crude Intake Temperature - Overflash.
  • Product Stripping.
  • Heat Balance of the Column – Pump Rounds.
  • Liquid - Vapor Flows: Fractionation and Heat Exchange Zone.
  • Desalting and Corrosion Control.
  • Corrosion by Sulfur, Napthenic Acids and Mineral Salts.
  • Crude Oil Desiting; Desalter Operation, Operating Variables Incidents and Troubleshooting.
  • Further Neutralizing Treatment.
  • Analysis of Operating Conditions of a Vacuum Distillation Unit.
  • Typical Unit: Process Scheme, Operating Conditions.
  • Material Balance and Separation Quality.
  • Vacuum System.
  • Operation of the Multi-Draw off Columns.
  • Different Control Systems Used in Atmospheric and Vacuum Distillation Columns.
  • Cut Point Control
  • Separation Control.
  • Influence of Pressure.

Who Can Benefit?

Chemicals engineers.