Chemistry — Fractional Distillation of Crude Oil

Fractions separated by boiling point up the column.

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digraph CrudeOil {
  rankdir=BT;
  node [shape=box, style=rounded];
  "Crude oil" -> Bitumen [label="highest bp"];
  Bitumen -> "Fuel oil";
  "Fuel oil" -> Diesel;
  Diesel -> Kerosene;
  Kerosene -> Petrol;
  Petrol -> "Refinery gases" [label="lowest bp"];
}