In my refinery, distillation columns are the heart where we separate crude into products, and McCabe-Thiele is the old, trusty method I still use on a napkin to sketch trays. Absorption and extraction? We use them too—like washing gases or pulling aromatics—but my real lesson is simpler. You see, after twenty-two years at the factory, I know a machine runs best not just on fancy methods, but on the care of the man who listens to its hum, like I listen for my son's key in the door. All that theory in my boy’s engineering books... it finds its soul only on the plant floor, with tea-stained drawings and the worry for a daughter’s future sharpening your eye.
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