Chemistry — Fractional Distillation of Crude Oil

Fractions separated by boiling point.

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