The Crude Distillation Vacuum Units (most commonly called “CDU” or ”VDU”) are challenged with a variety of problems that include hydrocarbon losses, reliability concerns, quality giveaways and energy costs.

Dorf Ketal offers refiners a program in achieving key performance indicators (KPIs) for the refinery’s run-length objectives to maximize the facility’s operating profitability. Dorf Ketal offers chemical programs for crude/vacuum units that include:

  • Desalters
  • Pre-heat exchanger train fouling control (heater fouling control)
  • Atmospheric unit overhead corrosion control
  • Vacuum unit overhead corrosion control
  • High temperature (naphthenic acid) corrosion control
  • Turn-around preparation chemicals


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